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Circulation. 2003;107:391-397
Published online before print January 27, 2003, doi: 10.1161/01.CIR.0000055014.62083.05
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(Circulation. 2003;107:391.)
© 2003 American Heart Association, Inc.


Clinical Investigation and Reports

C-Reactive Protein, the Metabolic Syndrome, and Risk of Incident Cardiovascular Events

An 8-Year Follow-Up of 14 719 Initially Healthy American Women

Paul M Ridker, MD; Julie E. Buring, ScD; Nancy R. Cook, ScD; Nader Rifai, PhD

From the Center for Cardiovascular Disease Prevention (P.M.R., J.E.B., N.R.C., N.R.), the Divisions of Preventive Medicine (P.M.R., J.E.B., N.R.C.) and Cardiology (P.M.R.), and the LeDucq Center for Cardiovascular Research (P.M.R., N.R.), Brigham and Women’s Hospital, and the Department of Laboratory Medicine, Children’s Hospital (N.R.), Harvard Medical School, Boston, Mass.

Correspondence to Paul M Ridker, MD, Center for Cardiovascular Disease Prevention, 900 Commonwealth Ave E, Boston, MA 02215. E-mail pridker{at}partners.org


*    Abstract
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Background— The metabolic syndrome describes a high-risk population having 3 or more of the following clinical characteristics: upper-body obesity, hypertriglyceridemia, low HDL, hypertension, and abnormal glucose. All of these attributes, however, are associated with increased levels of C-reactive protein (CRP).

Methods and Results— We evaluated interrelationships between CRP, the metabolic syndrome, and incident cardiovascular events among 14 719 apparently healthy women who were followed up for an 8-year period for myocardial infarction, stroke, coronary revascularization, or cardiovascular death; 24% of the cohort had the metabolic syndrome at study entry. At baseline, median CRP levels for those with 0, 1, 2, 3, 4, or 5 characteristics of the metabolic syndrome were 0.68, 1.09, 1.93, 3.01, 3.88, and 5.75 mg/L, respectively (Ptrend <0.0001). Over the 8-year follow-up, cardiovascular event-free survival rates based on CRP levels above or below 3.0 mg/L were similar to survival rates based on having 3 or more characteristics of the metabolic syndrome. At all levels of severity of the metabolic syndrome, however, CRP added prognostic information on subsequent risk. For example, among those with the metabolic syndrome at study entry, age-adjusted incidence rates of future cardiovascular events were 3.4 and 5.9 per 1000 person-years of exposure for those with baseline CRP levels less than or greater than 3.0 mg/L, respectively. Additive effects for CRP were also observed for those with 4 or 5 characteristics of the metabolic syndrome. The use of different definitions of the metabolic syndrome had minimal impact on these findings.

Conclusions— These prospective data suggest that measurement of CRP adds clinically important prognostic information to the metabolic syndrome.


Key Words: protein, C-reactive • risk factors • prognosis • diabetes mellitus • inflammation


*    Introduction
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Patients with the metabolic syndrome are at increased risk for diabetes and cardiovascular events,13 and the recently released Third Report of the National Cholesterol Education Program Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults (ATP-III) stresses the importance of targeting prevention strategies for such individuals.4 The ATP-III guideline also suggests a working definition of the metabolic syndrome that includes the presence of at least 3 of the following characteristics: abdominal obesity, elevated triglycerides, reduced levels of HDL cholesterol, high blood pressure, and high fasting glucose. However, all of these parameters are associated with elevated levels of C-reactive protein (CRP), an easily measured inflammatory biomarker that has proven to be a strong, independent predictor of both incident diabetes5,6 and incident cardiovascular disease.714 CRP levels also correlate with several other components of the metabolic syndrome such as fasting insulin, microalbuminuria, and impaired fibrinolysis that are not easily evaluated in usual clinical practice.1520 We therefore sought to evaluate in a large-scale population cohort the potential interrelationships between CRP, the metabolic syndrome, and incident cardiovascular events. We additionally sought evidence as to whether or not CRP might add prognostic information at all levels of severity of the metabolic syndrome.


*    Methods
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*Methods
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We evaluated the relationship of CRP with components of the metabolic syndrome among apparently healthy women participating in the Women’s Health Study (WHS), an ongoing trial of aspirin and vitamin E in primary prevention. Details of the WHS and the methods used to ascertain baseline risk factors and adjudicate clinical outcomes have been described elsewhere.8,10 In brief, American women aged 45 years and over with no prior history of cardiovascular disease or cancer were enrolled between November 1992 and July 1995, at which time they provided detailed information on demographic, lifestyle, and behavioral risk factors. Of these women, 28 345 provided baseline blood samples collected in EDTA, which were stored in liquid nitrogen. Since enrollment, all study participants have been followed up for incident cardiovascular events, including nonfatal myocardial infarction, nonfatal ischemic stroke, coronary revascularization procedures, and cardiovascular death.

Because recent randomized trial evidence indicates a net hazard in association with hormone replacement therapy (HRT), we elected to increase the generalizability of our data by limiting our analysis to the 15 745 WHS participants not using HRT at study entry. Of these, 14 719 were also free of diabetes at study entry and contributed complete data for all 5 components of the metabolic syndrome. Baseline blood samples from these women were thawed and assayed for CRP by a validated high-sensitivity assay (Denka Seiken), whereas triglyceride and HDL cholesterol levels were ascertained with direct measurement assays (Roche Diagnostics).

Women with 3 or more of the following attributes are typically defined as having the metabolic syndrome: (1) triglycerides >=150 mg/dL; (2) HDL cholesterol <50 mg/dL; (3) blood pressure >=135/85 mm Hg; (4) obesity as defined by a waist circumference >88 cm; and (5) abnormal glucose metabolism as defined by a fasting glucose >=110 mg/dL. In the WHS, triglycerides, HDL cholesterol, and blood pressure were directly ascertained as outlined above. However, waist circumference was not measured until year 6 of follow-up. As such, we elected to use as our cutpoint for obesity a body mass index (BMI) >26.7 kg/m2, a value that corresponded to the same percentile cutpoint for BMI at year 6 as did a waist circumference of 88 cm measured at that time. To address whether this choice of BMI affected our results, we repeated our analyses using a BMI cutpoint of 30 kg/m2 as suggested in recent European guidelines.21 Because fasting glucose levels were not available, we elected to conservatively use the diagnosis of incident type II diabetes during study follow-up as an alternative measure of baseline impairment of glucose metabolism. To address how closely these definitions represented the metabolic syndrome, we compared the proportion of women in the present study categorized according to characteristics of the metabolic syndrome as defined above to that previously published for American women in the National Health and Nutrition Survey (NHANES)22 using categories defined by the ATP-III guideline.

To evaluate for evidence of association between baseline CRP levels and the metabolic syndrome, we first compared the distribution of CRP levels among individuals with or without each of the individual components of the syndrome as defined above. Because levels of CRP are skewed, we evaluated the significance of any differences in median values between groups using the Wilcoxon rank-sum test. We then classified all study subjects as having 0, 1, 2, 3, 4, or 5 components of the metabolic syndrome and assessed for evidence of a relation of median CRP levels across these groups using the Jonckheere-Terpstra test. We then used logistic regression analysis to discern whether elevated CRP levels added prognostic information on risk of subsequent cardiovascular events across the full spectrum of severity of the metabolic syndrome. Consistent with recent recommendations from the Centers for Disease Control and Prevention, a CRP cutpoint of 3 mg/L was used to differentiate high-risk and low-risk groups.23

To directly compare the clinical utility of CRP alone to that of the metabolic syndrome alone, we constructed 8-year cardiovascular event-free survival curves for those with CRP levels above or below 3.0 mg/L and compared these to survival curves based on the presence or absence of 3 or more components of the metabolic syndrome. Age-adjusted c statistics, analogous to the area under the receiver operator characteristic (ROC) curve, were used to assess the discrimination of cardiovascular prediction models based on CRP alone versus those based on having 3 or more characteristics of the metabolic syndrome. These analyses were then repeated with continuous rather than dichotomous definitions used for components of the metabolic syndrome. Finally, in analysis stratified by those with and without the metabolic syndrome, we sought evidence in terms of cardiovascular event-free survival that CRP levels might have additional prognostic value in the prediction of incident cardiovascular end points.


*    Results
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*Results
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Mean age of the 14 719 women evaluated in the present study was 54±7.6 years. As defined by the proportion of individuals with increasing numbers of characteristics of the metabolic syndrome, the women participating in the present study were almost identical to those evaluated in the recent NHANES report22 (Table 1). Specifically, the proportion of women in the present cohort with 3 or more characteristics of the metabolic syndrome was 24.4% compared with 23.4% in NHANES.


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TABLE 1. Prevalence of Metabolic Syndrome Abnormalities Among Participants in the Women’s Health Study

Table 2 presents median CRP values (with interquartile ranges) for those study participants with and without each individual component of the metabolic syndrome. Consistent with prior cross-sectional data, CRP levels were significantly higher among women who had each component of the metabolic syndrome than among women who did not (all P<0.0001).


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TABLE 2. Median CRP Levels (Interquartile Range) Among 14 719 American Women According to the Presence or Absence of Each Component of the Metabolic Syndrome

Figure 1 displays the distribution of CRP levels after women were classified according to their total number of components of the metabolic syndrome. As shown, there was a strong linear increase in CRP levels as the number of components of the metabolic syndrome increased; median CRP levels for those with 0, 1, 2, 3, 4, or 5 characteristics of the metabolic syndrome were 0.68, 1.09, 1.93, 3.01, 3.88, and 5.75 mg/L, respectively (Ptrend<0.0001).



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Figure 1. Distribution of CRP levels among 14 719 American women according to presence of 0, 1, 2, 3, 4, or 5 components of metabolic syndrome. Box plots demonstrate median, 25th, and 75th percentile values for CRP.

As shown in Figure 2, CRP levels >3 mg/L at baseline added prognostic information at all levels of severity of the metabolic syndrome. This additive effect was particularly apparent among those with 3, 4, or 5 characteristics of the metabolic syndrome (all P<0.001).



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Figure 2. Relative risks of future cardiovascular events according to number of components of metabolic syndrome and according to CRP levels above or below 3.0 mg/L.

Figure 3 presents results of the survival analyses directly comparing CRP with the metabolic syndrome. As shown, the predictive value of CRP levels above or below 3.0 mg/L in terms of the development of first-ever cardiovascular events was quite similar to the predictive value associated with having or not having 3 or more characteristics of the metabolic syndrome. In age-adjusted analyses, the area under the ROC curve associated with CRP alone was 0.77 versus 0.78 for the metabolic syndrome.



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Figure 3. Comparison of cardiovascular event-free survival for those with and without metabolic syndrome to those with baseline CRP levels above or below 3.0 mg/L. CVD indicates cardiovascular disease.

As prespecified, we additionally sought evidence that CRP might have prognostic utility among those with and without the metabolic syndrome. We therefore first performed an analysis limited to the 3597 study participants classified as having 3 or more characteristics of the metabolic syndrome at study entry. Among these women, we observed significant increases in rates of future cardiovascular disease as levels of baseline CRP increased. Specifically, age-adjusted incidence rates were 3.4 and 5.9 events per 1000 person-years of exposure for those with baseline CRP levels less than or greater than 3.0 mg/L, respectively (P<0.001).

To further explore these interrelationships, we divided the study cohort into 4 groups on the basis of the presence or absence of the metabolic syndrome and on the basis of CRP levels less than or greater than 3.0 mg/L. As shown in Figure 4 (left), CRP evaluation provided additional prognostic information both for those with and without the metabolic syndrome. The age-adjusted relative risks of future cardiovascular events for women in the low-CRP/no metabolic syndrome, high-CRP/no metabolic syndrome, low-CRP/yes metabolic syndrome, and high-CRP/yes metabolic syndrome groups were 1.0 (referent), 1.5 (95% CI 1.0 to 2.2), 2.3 (95% CI 1.6 to 3.3), and 4.0 (95% CI 3.0 to 5.4), respectively.



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Figure 4. Cardiovascular event-free survival in analyses stratified by both CRP and metabolic syndrome. CVD indicates cardiovascular disease.

We performed several additional analyses to address the robustness of these findings. First, because the concept of the metabolic syndrome was developed in part to reflect a secondary target population without hyperlipidemia, we repeated our analyses for the 12 453 women with baseline LDL cholesterol levels <160 mg/dL and for the 8500 women with LDL cholesterol <130 mg/dL. As shown in Figure 4 (middle and right), CRP provided prognostic information in addition to the metabolic syndrome in both of these latter analyses. The relative risks and associated CIs for these analyses are presented in Table 3.


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TABLE 3. Relative Risks (95% CIs) of Future Cardiovascular Events According to CRP Levels Greater Than or Less Than 3.0 mg/L and According to the Presence or Absence of the Metabolic Syndrome

Second, and as also shown in Table 3, we repeated our analyses using only the end point of coronary heart disease. For this end point, overall effects were, if anything, larger than that observed with the a priori combined end point that also included thromboembolic stroke.

Third, we repeated our analyses using continuous rather than dichotomous variables and found similar effects. In the continuous variable models, the relative risk of future cardiovascular events associated with CRP levels >3.0 mg/L was 1.5 (P=0.006), and the area under the ROC curve was 0.82. By contrast, when dichotomous definitions for each component of the metabolic syndrome were used, the corresponding relative risk was 1.6 (P=0.0003), and the corresponding area under the ROC curve was 0.79.

Fourth, we repeated our primary analyses using a BMI cutpoint of 30 kg/m2 and again found almost identical results in terms of additive predictive value. Use of this cutpoint, however, classified only 17% of the present cohort as obese. By contrast, the use of a BMI cutpoint of 26.7 kg/m2 (as done in our primary analyses) classified 32% of the cohort as obese, a value closer to that observed in the NHANES survey.

Finally, we performed an additional analysis limited to those 3597 participants with the metabolic syndrome at study entry and found that CRP levels <1, 1 to 3, and >3 mg/L stratified the population into 3 risk groups such that those with the metabolic syndrome and the highest CRP levels had a relative risk 2.1 times that of those with the metabolic syndrome who had the lowest CRP levels (95% CI 1.1 to 4.2, P=0.001; Figure 5). In all these analyses, virtually identical results were observed when we excluded incident diabetes as part of the definition of the metabolic syndrome.



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Figure 5. Cardiovascular event-free survival in analyses stratified by CRP levels <1, 1 to 3, and >=3 mg/L. Data are shown for 3597 study participants with metabolic syndrome at study entry. CVD indicates cardiovascular disease.


*    Discussion
up arrowTop
up arrowAbstract
up arrowIntroduction
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up arrowResults
*Discussion
down arrowReferences
 
Recent guidelines stress the importance of identifying individuals with the metabolic syndrome as a high-risk group for the development of cardiovascular disease.4 The present prospective cohort of 14 719 initially healthy women confirms this association, because those with the metabolic syndrome had significantly worse cardiovascular event-free survival than did those without the metabolic syndrome. However, the present data also demonstrate that at all levels of severity of the metabolic syndrome, CRP added important and independent prognostic information in terms of future cardiovascular risk. This additive effect was present in all study groups evaluated and was robust to the several methods used to define the metabolic syndrome.

That CRP levels correspond with individual components of the metabolic is consistent with work of other investigators1520 and the hypothesized role of inflammation in several processes critical to the development of both diabetes and atherothrombosis.24,25 Indeed, in this cohort, we have previously shown baseline CRP levels to be a strong predictor not only of myocardial infarction and stroke8,10 but also of incident type 2 diabetes.5 Rapidly evolving work now demonstrates that in addition to being a marker of innate immunity, CRP also has several direct effects at the level of the vessel wall.26,27 These observations, along with basic research into the inflammatory mechanisms of both diabetes and vascular dysfunction, provide strong evidence that insulin resistance and atherosclerosis share a common inflammatory basis.28 CRP, however, is also associated with several aspects of the metabolic syndrome not easily ascertained in usual clinical practice, including fasting insulin, hypofibrinolysis, and microalbuminuria.1520 Our finding that CRP measurement adds important prognostic information to clinical definitions of the metabolic syndrome is thus consistent with this hypothesis.

Limitations of this study must be considered. First, the study included only women. We believe, however, that these data are likely to generalize to men because other studies have linked markers of inflammation to individual components of the metabolic syndrome in men, and many cohort studies have already shown CRP to independently predict vascular events in men.7,1114 Second, because we did not have fasting glucose levels in all participants, we elected instead to use the diagnosis of incident diabetes during follow-up as a surrogate for abnormal baseline glucose metabolism. We believe this choice to be valid because other work has shown CRP levels to correlate with fasting glucose level29 and predict incident type 2 diabetes.5,6 Moreover, as shown in Table 1, this choice was, if anything, conservative, because it resulted in only 1.2% of the present cohort being defined as having all 5 characteristics of the metabolic syndrome versus 2.9% in the NHANES survey. We also believe it unlikely that this decision affected validity, because elevated fasting glucose is by far the least common abnormality used to define those with the metabolic syndrome. Finally, these analyses do not make adjustment for other factors that may affect CRP levels, such as smoking status.

We recognize that these data have broad implications for the development of therapies targeting insulin resistance, diabetes, and atherothrombosis. We have previously shown that aspirin and statins are relatively more effective in reducing vascular risk among those with elevated CRP levels,7,9,30 and we have hypothesized on that basis that CRP is likely to have utility in the targeting of therapies for the primary prevention of cardiovascular disease. At the same time, weight reduction and exercise, the first-line therapies stressed by ATP-III for the management of the metabolic syndrome, also reduce CRP levels. Furthermore, a recent report suggests that rosiglitazone directly reduces CRP levels, an intriguing observation because this PPAR-{gamma} inhibitor is already established as standard therapy for those with type II diabetes.31

In sum, these data provide clear evidence that the presence of at least 3 of 5 components of the metabolic syndrome predicts incident cardiovascular events in apparently healthy women. However, these data also indicate that among those with and without the metabolic syndrome, baseline CRP levels add clinically relevant prognostic information concerning future vascular risk.


*    Acknowledgments
 
This study was supported by grants HL-43851, HL-63293, and HL-58755 from the National Heart, Lung, and Blood Institute (Bethesda, Md), the Leducq Foundation (Paris, France), and a Distinguished Clinical Scientist Award to Dr Ridker from the Doris Duke Charitable Foundation (New York, NY).


*    Footnotes
 
This article originally appeared Online on January 27, 2003 (Circulation. 2003;107:r20–r26).

Dr Ridker is named as a coinventor on patents filed by the Brigham and Women’s Hospital that relate to the use of inflammatory biomarkers in cardiovascular disease and diabetes.

Received December 2, 2002; revision received December 20, 2002; accepted December 20, 2002.


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up arrowResults
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*References
 
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J Am Coll CardiolHome page
L. J. Shaw, R. Bugiardini, and C. N. B. Merz
Women and ischemic heart disease: evolving knowledge.
J. Am. Coll. Cardiol., October 20, 2009; 54(17): 1561 - 1575.
[Abstract] [Full Text] [PDF]


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LupusHome page
V Bellomio, A Spindler, E Lucero, A Berman, R Sueldo, H Berman, M Santana, M. Molina, V Gongora, G Cassano, et al.
Metabolic syndrome in Argentinean patients with systemic lupus erythematosus
Lupus, October 1, 2009; 18(11): 1019 - 1025.
[Abstract] [PDF]


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CirculationHome page
D. Conen, K. M. Rexrode, M. A. Creager, P. M Ridker, and A. D. Pradhan
Metabolic Syndrome, Inflammation, and Risk of Symptomatic Peripheral Artery Disease in Women: A Prospective Study
Circulation, September 22, 2009; 120(12): 1041 - 1047.
[Abstract] [Full Text] [PDF]


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Am J Clin PatholHome page
I. Jialal
The Role of the Laboratory in the Diagnosis of the Metabolic Syndrome
Am J Clin Pathol, August 1, 2009; 132(2): 161 - 162.
[Full Text] [PDF]


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JCOHome page
K. C. Oeffinger, B. Adams-Huet, R. G. Victor, T. S. Church, P. G. Snell, A. L. Dunn, D. A. Eshelman-Kent, R. Ross, P. M. Janiszewski, A. J. Turoff, et al.
Insulin Resistance and Risk Factors for Cardiovascular Disease in Young Adult Survivors of Childhood Acute Lymphoblastic Leukemia
J. Clin. Oncol., August 1, 2009; 27(22): 3698 - 3704.
[Abstract] [Full Text] [PDF]


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J. Clin. Endocrinol. Metab.Home page
A. Mahajan, R. Tabassum, S. Chavali, O. P. Dwivedi, M. Bharadwaj, N. Tandon, and D. Bharadwaj
High-Sensitivity C-Reactive Protein Levels and Type 2 Diabetes in Urban North Indians
J. Clin. Endocrinol. Metab., June 1, 2009; 94(6): 2123 - 2127.
[Abstract] [Full Text] [PDF]


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Am. J. Clin. Nutr.Home page
A. W Fogarty, S. A Lewis, T. M McKeever, and J. R Britton
Is higher sodium intake associated with elevated systemic inflammation? A population-based study
Am. J. Clinical Nutrition, June 1, 2009; 89(6): 1901 - 1904.
[Abstract] [Full Text] [PDF]


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Am. J. Clin. Nutr.Home page
T. W McDade, J. N Rutherford, L. Adair, and C. Kuzawa
Population differences in associations between C-reactive protein concentration and adiposity: comparison of young adults in the Philippines and the United States
Am. J. Clinical Nutrition, April 1, 2009; 89(4): 1237 - 1245.
[Abstract] [Full Text] [PDF]


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J. Clin. Endocrinol. Metab.Home page
A. G. Pittas, S. S. Harris, M. Eliades, P. Stark, and B. Dawson-Hughes
Association between Serum Osteocalcin and Markers of Metabolic Phenotype
J. Clin. Endocrinol. Metab., March 1, 2009; 94(3): 827 - 832.
[Abstract] [Full Text] [PDF]


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CirculationHome page
J. Steinberger, S. R. Daniels, R. H. Eckel, L. Hayman, R. H. Lustig, B. McCrindle, and M. L. Mietus-Snyder
Progress and Challenges in Metabolic Syndrome in Children and Adolescents: A Scientific Statement From the American Heart Association Atherosclerosis, Hypertension, and Obesity in the Young Committee of the Council on Cardiovascular Disease in the Young; Council on Cardiovascular Nursing; and Council on Nutrition, Physical Activity, and Metabolism
Circulation, February 3, 2009; 119(4): 628 - 647.
[Full Text] [PDF]


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J Gerontol A Biol Sci Med SciHome page
B. W. J. H. Penninx, B. J. Nicklas, A. B. Newman, T. B. Harris, B. H. Goodpaster, S. Satterfield, N. de Rekeneire, K. Yaffe, M. Pahor, S. B. Kritchevsky, et al.
Metabolic Syndrome and Physical Decline in Older Persons: Results from the Health, Aging and Body Composition Study
J Gerontol A Biol Sci Med Sci, January 27, 2009; (2009) gln005v2.
[Abstract] [Full Text] [PDF]


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HeartHome page
R Iijima, R A Byrne, G Ndrepepa, S Braun, J Mehilli, P B Berger, A Schomig, and A Kastrati
Pre-procedural C-reactive protein levels and clinical outcomes after percutaneous coronary interventions with and without abciximab: pooled analysis of four ISAR trials
Heart, January 15, 2009; 95(2): 107 - 112.
[Abstract] [Full Text] [PDF]


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Cleveland Clinic Journal of MedicineHome page
M. H. SHISHEHBOR and S. L. HAZEN
JUPITER to Earth: A statin helps people with normal LDL-C and high hs-CRP, but what does it mean?
Cleveland Clinic Journal of Medicine, January 1, 2009; 76(1): 37 - 44.
[Abstract] [Full Text] [PDF]


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J. Clin. Endocrinol. Metab.Home page
T. Sathyapalan, E. S. Kilpatrick, A.-M. Coady, and S. L. Atkin
The Effect of Atorvastatin in Patients with Polycystic Ovary Syndrome: A Randomized Double-Blind Placebo-Controlled Study
J. Clin. Endocrinol. Metab., January 1, 2009; 94(1): 103 - 108.
[Abstract] [Full Text] [PDF]


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Toxicol PatholHome page
Y. Handelsman
Metabolic Syndrome Pathophysiology and Clinical Presentation
Toxicol Pathol, January 1, 2009; 37(1): 18 - 20.
[Abstract] [Full Text] [PDF]


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ESC Textbook of Cardiovascular MedicineHome page
F. Cosentino, L. Rydén, P. Francia, and L. G. Mellbin
CHAPTER 14 Diabetes Mellitus and Metabolic Syndrome
ESC Textbook of Cardiovascular Medicine, January 1, 2009; 2(1): med-9780199566990-chapter - med-9780199566990-chapter.
[Abstract] [Full Text] [PDF]


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Endocr. Rev.Home page
M.-A. Cornier, D. Dabelea, T. L. Hernandez, R. C. Lindstrom, A. J. Steig, N. R. Stob, R. E. Van Pelt, H. Wang, and R. H. Eckel
The Metabolic Syndrome
Endocr. Rev., December 1, 2008; 29(7): 777 - 822.
[Abstract] [Full Text] [PDF]


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J. Nutr.Home page
T. W. McDade, J. N. Rutherford, L. Adair, and C. Kuzawa
Adiposity and Pathogen Exposure Predict C-Reactive Protein in Filipino Women
J. Nutr., December 1, 2008; 138(12): 2442 - 2447.
[Abstract] [Full Text] [PDF]


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Circ Heart FailHome page
T. Suzuki, R. Katz, N. S. Jenny, N. A. Zakai, M. M. LeWinter, J. I. Barzilay, and M. Cushman
Metabolic Syndrome, Inflammation, and Incident Heart Failure in the Elderly: The Cardiovascular Health Study
Circ Heart Fail, November 1, 2008; 1(4): 242 - 248.
[Abstract] [Full Text] [PDF]


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ChestHome page
K. Nakajima, Y. Kubouchi, T. Muneyuki, M. Ebata, S. Eguchi, and H. Munakata
A Possible Association Between Suspected Restrictive Pattern as Assessed by Ordinary Pulmonary Function Test and the Metabolic Syndrome
Chest, October 1, 2008; 134(4): 712 - 718.
[Abstract] [Full Text] [PDF]


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Psychosom. Med.Home page
P. G. Surtees, N. W. J. Wainwright, S. M. Boekholdt, R. N. Luben, N. J. Wareham, and K.-T. Khaw
Major Depression, C-Reactive Protein, and Incident Ischemic Heart Disease in Healthy Men and Women
Psychosom Med, October 1, 2008; 70(8): 850 - 855.
[Abstract] [Full Text] [PDF]


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Diabetes CareHome page
H. M. Lee, T. V. Le, V. A. Lopez, and N. D. Wong
Association of C-Reactive Protein With Reduced Forced Vital Capacity in a Nonsmoking U.S. Population With Metabolic Syndrome and Diabetes
Diabetes Care, October 1, 2008; 31(10): 2000 - 2002.
[Abstract] [Full Text] [PDF]


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CirculationHome page
R. L. Pande, T. S. Perlstein, J. A. Beckman, and M. A. Creager
Association of Insulin Resistance and Inflammation With Peripheral Arterial Disease: The National Health and Nutrition Examination Survey, 1999 to 2004
Circulation, July 1, 2008; 118(1): 33 - 41.
[Abstract] [Full Text] [PDF]


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Diabetes and Vascular Disease ResearchHome page
K. Chen, J. B Lindsey, A. Khera, J. A. D. Lemos, C. R Ayers, A. Goyal, G. L Vega, S. A Murphy, S. M Grundy, and D. K Mcguire
Independent associations between metabolic syndrome, diabetes mellitus and atherosclerosis: observations from the Dallas Heart Study
Diabetes and Vascular Disease Research, June 1, 2008; 5(2): 96 - 101.
[Abstract] [PDF]


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Int J STD AIDSHome page
M K Baum, C Rafie, S Sales, S Lai, R Duan, D T Jayaweera, J B Page, and A Campa
C-reactive protein: a poor marker of cardiovascular disease risk in HIV+ populations with a high prevalence of elevated serum transaminases
Int J STD AIDS, June 1, 2008; 19(6): 410 - 413.
[Abstract] [Full Text] [PDF]


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Pharmacol. Rev.Home page
V. M. Miller and S. P. Duckles
Vascular Actions of Estrogens: Functional Implications
Pharmacol. Rev., June 1, 2008; 60(2): 210 - 241.
[Abstract] [Full Text] [PDF]


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Clin. Chem.Home page
A. Kelley-Hedgepeth, D. M. Lloyd-Jones, A. Colvin, K. A. Matthews, J. Johnston, M. R. Sowers, B. Sternfeld, R. C. Pasternak, C. U. Chae, and for the SWAN Investigators
Ethnic Differences in C-Reactive Protein Concentrations
Clin. Chem., June 1, 2008; 54(6): 1027 - 1037.
[Abstract] [Full Text] [PDF]


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Am J EpidemiolHome page
F. Tabassum, M. Kumari, A. Rumley, G. Lowe, C. Power, and D. P. Strachan
Effects of Socioeconomic Position on Inflammatory and Hemostatic Markers: A Life-Course Analysis in the 1958 British Birth Cohort
Am. J. Epidemiol., June 1, 2008; 167(11): 1332 - 1341.
[Abstract] [Full Text] [PDF]


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J Gerontol A Biol Sci Med SciHome page
T. You, B. J. Nicklas, J. Ding, B. W. J. H. Penninx, B. H. Goodpaster, D. C. Bauer, F. A. Tylavsky, T. B. Harris, S. B. Kritchevsky, and for the Health, Aging and Body Composition Study
The Metabolic Syndrome Is Associated With Circulating Adipokines in Older Adults Across a Wide Range of Adiposity
J Gerontol A Biol Sci Med Sci, April 1, 2008; 63(4): 414 - 419.
[Abstract] [Full Text] [PDF]


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Eur Heart JHome page
D. Conen, P. M. Ridker, S. Mora, J. E. Buring, and R. J. Glynn
Risk of type 2 diabetes mellitus in those with hypertension: reply
Eur. Heart J., April 1, 2008; 29(7): 953 - 954.
[Full Text] [PDF]


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CirculationHome page
H. Watanabe, N. Tanabe, T. Watanabe, D. Darbar, D. M. Roden, S. Sasaki, and Y. Aizawa
Metabolic Syndrome and Risk of Development of Atrial Fibrillation: The Niigata Preventive Medicine Study
Circulation, March 11, 2008; 117(10): 1255 - 1260.
[Abstract] [Full Text] [PDF]


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Eur Heart JHome page
V. Stangl, V. Witzel, G. Baumann, and K. Stangl
Current diagnostic concepts to detect coronary artery disease in women
Eur. Heart J., March 2, 2008; 29(6): 707 - 717.
[Abstract] [Full Text] [PDF]


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Ann Fam MedHome page
D. E. King, A. G. Mainous III, B. M. Egan, R. F. Woolson, and M. E. Geesey
Effect of Psyllium Fiber Supplementation on C-Reactive Protein: The Trial to Reduce Inflammatory Markers (TRIM)
Ann. Fam. Med, March 1, 2008; 6(2): 100 - 106.
[Abstract] [Full Text] [PDF]


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Arterioscler. Thromb. Vasc. Bio.Home page
C. Cuaz-Perolin, L. Billiet, E. Bauge, C. Copin, D. Scott-Algara, F. Genze, B. Buchele, T. Syrovets, T. Simmet, and M. Rouis
Antiinflammatory and Antiatherogenic Effects of the NF-{kappa}B Inhibitor Acetyl-11-Keto-{beta}-Boswellic Acid in LPS-Challenged ApoE-/- Mice
Arterioscler Thromb Vasc Biol, February 1, 2008; 28(2): 272 - 277.
[Abstract] [Full Text] [PDF]


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Clin. Chem.Home page
C. Marsik, L. Kazemi-Shirazi, T. Schickbauer, S. Winkler, C. Joukhadar, O. F. Wagner, and G. Endler
C-Reactive Protein and All-Cause Mortality in a Large Hospital-Based Cohort
Clin. Chem., February 1, 2008; 54(2): 343 - 349.
[Abstract] [Full Text] [PDF]


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Clin. Chem.Home page
J. M. Moreno-Navarrete, F. J. Ortega, J. Bassols, A. Castro, W. Ricart, and J. M. Fernandez-Real
Association of Circulating Lactoferrin Concentration and 2 Nonsynonymous LTF Gene Polymorphisms with Dyslipidemia in Men Depends on Glucose-Tolerance Status
Clin. Chem., February 1, 2008; 54(2): 301 - 309.
[Abstract] [Full Text] [PDF]


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Clin. Chem.Home page
R. R. S. Packard and P. Libby
Inflammation in Atherosclerosis: From Vascular Biology to Biomarker Discovery and Risk Prediction
Clin. Chem., January 1, 2008; 54(1): 24 - 38.
[Abstract] [Full Text] [PDF]


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J. Med. Genet.Home page
Y Yamada, S Ichihara, K Kato, T Yoshida, K Yokoi, H Matsuo, S Watanabe, N Metoki, H Yoshida, K Satoh, et al.
Genetic risk for metabolic syndrome: examination of candidate gene polymorphisms related to lipid metabolism in Japanese people
J. Med. Genet., January 1, 2008; 45(1): 22 - 28.
[Abstract] [Full Text] [PDF]


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Eur Heart JHome page
D. Conen, P. M. Ridker, S. Mora, J. E. Buring, and R. J. Glynn
Blood pressure and risk of developing type 2 diabetes mellitus: The Women's Health Study
Eur. Heart J., December 1, 2007; 28(23): 2937 - 2943.
[Abstract] [Full Text] [PDF]


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HeartHome page
C A Daly, P Hildebrandt, M Bertrand, R Ferrari, W Remme, M Simoons, K M Fox, and on behalf of the EUROPA investigators
Adverse prognosis associated with the metabolic syndrome in established coronary artery disease: data from the EUROPA trial
Heart, November 1, 2007; 93(11): 1406 - 1411.
[Abstract] [Full Text] [PDF]


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Eur J EndocrinolHome page
D. H St-Pierre, J.-P. Bastard, L. Coderre, M. Brochu, A. D Karelis, M.-E. Lavoie, F. Malita, J. Fontaine, D. Mignault, K. Cianflone, et al.
Association of acylated ghrelin profiles with chronic inflammatory markers in overweight and obese postmenopausal women: a MONET study
Eur. J. Endocrinol., October 1, 2007; 157(4): 419 - 426.
[Abstract] [Full Text] [PDF]


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J. Clin. Endocrinol. Metab.Home page
A. Kotronen, J. Westerbacka, R. Bergholm, K. H. Pietilainen, and H. Yki-Jarvinen
Liver Fat in the Metabolic Syndrome
J. Clin. Endocrinol. Metab., September 1, 2007; 92(9): 3490 - 3497.
[Abstract] [Full Text] [PDF]


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Diabetes CareHome page
A. Muscari, S. Antonelli, G. Bianchi, G. Cavrini, S. Dapporto, A. Ligabue, C. Ludovico, D. Magalotti, G. Poggiopollini, M. Zoli, et al.
Serum C3 Is a Stronger Inflammatory Marker of Insulin Resistance Than C-Reactive Protein, Leukocyte Count, and Erythrocyte Sedimentation Rate: Comparison study in an elderly population
Diabetes Care, September 1, 2007; 30(9): 2362 - 2368.
[Abstract] [Full Text] [PDF]


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CirculationHome page
E. Ingelsson, M. J. Pencina, G. H. Tofler, E. J. Benjamin, K. J. Lanier, P. F. Jacques, C. S. Fox, J. B. Meigs, D. Levy, M. G. Larson, et al.
Multimarker Approach to Evaluate the Incidence of the Metabolic Syndrome and Longitudinal Changes in Metabolic Risk Factors: The Framingham Offspring Study
Circulation, August 28, 2007; 116(9): 984 - 992.
[Abstract] [Full Text] [PDF]


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Arch Intern MedHome page
S. Liu, L. Tinker, Y. Song, N. Rifai, D. E. Bonds, N. R. Cook, G. Heiss, B. V. Howard, G. S. Hotamisligil, F. B. Hu, et al.
A Prospective Study of Inflammatory Cytokines and Diabetes Mellitus in a Multiethnic Cohort of Postmenopausal Women
Arch Intern Med, August 13, 2007; 167(15): 1676 - 1685.
[Abstract] [Full Text] [PDF]


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CirculationHome page
S. Cicala, G. de Simone, M. J. Roman, L. G. Best, E. T. Lee, W. Wang, T. K. Welty, J. M. Galloway, B. V. Howard, and R. B. Devereux
Prevalence and Prognostic Significance of Wall-Motion Abnormalities in Adults Without Clinically Recognized Cardiovascular Disease: The Strong Heart Study
Circulation, July 10, 2007; 116(2): 143 - 150.
[Abstract] [Full Text] [PDF]


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J. Clin. Endocrinol. Metab.Home page
D.-F. Dai, J.-W. Lin, J.-H. Kao, C.-N. Hsu, F.-T. Chiang, J.-L. Lin, Y.-H. Chou, K.-L. Hsu, C.-D. Tseng, Y.-Z. Tseng, et al.
The Effects of Metabolic Syndrome Versus Infectious Burden on Inflammation, Severity of Coronary Atherosclerosis, and Major Adverse Cardiovascular Events
J. Clin. Endocrinol. Metab., July 1, 2007; 92(7): 2532 - 2537.
[Abstract] [Full Text] [PDF]


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Eur Heart JHome page
Authors/Task Force Members:, G. Mancia, G. De Backer, A. Dominiczak, R. Cifkova, R. Fagard, G. Germano, G. Grassi, A. M. Heagerty, S. E. Kjeldsen, et al.
2007 Guidelines for the Management of Arterial Hypertension: The Task Force for the Management of Arterial Hypertension of the European Society of Hypertension (ESH) and of the European Society of Cardiology (ESC)
Eur. Heart J., June 11, 2007; (2007) ehm236v1.
[Full Text] [PDF]


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Eur Heart J SupplHome page
Authors/Task Force Members, L. Ryden, E. Standl, M. Bartnik, G. V. d. Berghe, J. Betteridge, M.-J. de Boer, F. Cosentino, B. Jonsson, M. Laakso, et al.
Guidelines on diabetes, pre-diabetes, and cardiovascular diseases: full text: The Task Force on Diabetes and Cardiovascular Diseases of the European Society of Cardiology (ESC) and of the European Association for the Study of Diabetes (EASD)
Eur. Heart J. Suppl., June 1, 2007; 9(suppl_C): C3 - C74.
[Full Text] [PDF]


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Arterioscler. Thromb. Vasc. Bio.Home page
M. Persson, B. Hedblad, J. J. Nelson, and G. Berglund
Elevated Lp-PLA2 Levels Add Prognostic Information to the Metabolic Syndrome on Incidence of Cardiovascular Events Among Middle-Aged Nondiabetic Subjects
Arterioscler Thromb Vasc Biol, June 1, 2007; 27(6): 1411 - 1416.
[Abstract] [Full Text] [PDF]


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ThoraxHome page
A. W Fogarty, S. Jones, J. R Britton, S. A Lewis, and T. M McKeever
Systemic inflammation and decline in lung function in a general population: a prospective study
Thorax, June 1, 2007; 62(6): 515 - 520.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
O. Ben-Yehuda
High-Sensitivity C-Reactive Protein in Every Chart?: The Use of Biomarkers in Individual Patients
J. Am. Coll. Cardiol., May 29, 2007; 49(21): 2139 - 2141.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
P. M. Ridker
C-Reactive Protein and the Prediction of Cardiovascular Events Among Those at Intermediate Risk: Moving an Inflammatory Hypothesis Toward Consensus
J. Am. Coll. Cardiol., May 29, 2007; 49(21): 2129 - 2138.
[Abstract] [Full Text] [PDF]


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Circ. Res.Home page
P. E. Szmitko and S. Verma
C-Reactive Protein and Reendothelialization: NO Involvement
Circ. Res., May 25, 2007; 100(10): 1405 - 1407.
[Full Text] [PDF]


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J Am Coll CardiolHome page
X. Ye, Z. Yu, H. Li, O. H. Franco, Y. Liu, and X. Lin
Distributions of C-Reactive Protein and its Association With Metabolic Syndrome in Middle-Aged and Older Chinese People
J. Am. Coll. Cardiol., May 1, 2007; 49(17): 1798 - 1805.
[Abstract] [Full Text] [PDF]


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CJASNHome page
I. M. Wahba and R. H. Mak
Obesity and Obesity-Initiated Metabolic Syndrome: Mechanistic Links to Chronic Kidney Disease
Clin. J. Am. Soc. Nephrol., May 1, 2007; 2(3): 550 - 562.
[Abstract] [Full Text] [PDF]


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Arterioscler. Thromb. Vasc. Bio.Home page
A. Lopez-Bermejo, B. Chico-Julia, A. Castro, M. Recasens, E. Esteve, J. Biarnes, R. Casamitjana, W. Ricart, and J.-M. Fernandez-Real
Alpha Defensins 1, 2, and 3: Potential Roles in Dyslipidemia and Vascular Dysfunction in Humans
Arterioscler Thromb Vasc Biol, May 1, 2007; 27(5): 1166 - 1171.
[Abstract] [Full Text] [PDF]


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J Clin PharmacolHome page
A. I. Kakafika, D. P. Mikhailidis, A. Karagiannis, and V. G. Athyros
The Role of Endocannabinoid System Blockade in the Treatment of the Metabolic Syndrome
J. Clin. Pharmacol., May 1, 2007; 47(5): 642 - 652.
[Abstract] [Full Text] [PDF]


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ANGIOLOGYHome page
C. Pitsavos, D. B. Panagiotakos, N. Tzima, Y. Lentzas, C. Chrysohoou, U. N. Das, and C. Stefanadis
Diet, Exercise, and C-Reactive Protein Levels in People With Abdominal Obesity: The ATTICA Epidemiological Study
Angiology, April 1, 2007; 58(2): 225 - 233.
[Abstract] [PDF]


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Eur Heart JHome page
J. Wang, S. Ruotsalainen, L. Moilanen, P. Lepisto, M. Laakso, and J. Kuusisto
The metabolic syndrome predicts cardiovascular mortality: a 13-year follow-up study in elderly non-diabetic Finns
Eur. Heart J., April 1, 2007; 28(7): 857 - 864.
[Abstract] [Full Text] [PDF]


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StrokeHome page
O. Schlager, M. Exner, W. Mlekusch, S. Sabeti, J. Amighi, P. Dick, O. Wagner, R. Koppensteiner, E. Minar, and M. Schillinger
C-Reactive Protein Predicts Future Cardiovascular Events in Patients With Carotid Stenosis
Stroke, April 1, 2007; 38(4): 1263 - 1268.
[Abstract] [Full Text] [PDF]


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Arch. Dis. Child.Home page
J. Jose Diaz, J. Arguelles, I. Malaga, C. Perillan, A. Dieguez, M. Vijande, and S. Malaga
C-reactive protein is elevated in the offspring of parents with essential hypertension
Arch. Dis. Child., April 1, 2007; 92(4): 304 - 308.
[Abstract] [Full Text] [PDF]


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Arch Intern MedHome page
D. E. King, B. M. Egan, R. F. Woolson, A. G. Mainous III, Y. Al-Solaiman, and A. Jesri
Effect of a High-Fiber Diet vs a Fiber-Supplemented Diet on C-Reactive Protein Level
Arch Intern Med, March 12, 2007; 167(5): 502 - 506.
[Abstract] [Full Text] [PDF]


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haematolHome page
C. Ay, T. Tengler, R. Vormittag, R. Simanek, W. Dorda, T. Vukovich, and I. Pabinger
Venous thromboembolism a manifestation of the metabolic syndrome
Haematologica, March 1, 2007; 92(3): 374 - 380.
[Abstract] [Full Text] [PDF]


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Clin. Chem.Home page
R. Kelishadi, M. Sharifi, A. Khosravi, and K. Adeli
Relationship Between C-Reactive Protein and Atherosclerotic Risk Factors and Oxidative Stress Markers Among Young Persons 10-18 Years Old
Clin. Chem., March 1, 2007; 53(3): 456 - 464.
[Abstract] [Full Text] [PDF]


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Mayo Clin Proc.Home page
V. Jeevanantham, N. Singh, K. Izuora, J. P. D'souza, and D. H. Hsi
Correlation of High Sensitivity C-Reactive Protein and Calcific Aortic Valve Disease
Mayo Clin. Proc., February 1, 2007; 82(2): 171 - 174.
[Abstract] [Full Text] [PDF]


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Arterioscler. Thromb. Vasc. Bio.Home page
H. Koyama, T. Shoji, S. Fukumoto, K. Shinohara, T. Shoji, M. Emoto, K. Mori, H. Tahara, E. Ishimura, R. Kakiya, et al.
Low Circulating Endogenous Secretory Receptor for AGEs Predicts Cardiovascular Mortality in Patients With End-Stage Renal Disease
Arterioscler Thromb Vasc Biol, January 1, 2007; 27(1): 147 - 153.
[Abstract] [Full Text] [PDF]


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HeartHome page
E K Iliodromitis, S Kyrzopoulos, I A Paraskevaidis, K G Kolocassides, S Adamopoulos, G Karavolias, and D T Kremastinos
Increased C reactive protein and cardiac enzyme levels after coronary stent implantation. Is there protection by remote ischaemic preconditioning?
Heart, December 1, 2006; 92(12): 1821 - 1826.
[Abstract] [Full Text] [PDF]


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Am. J. Clin. Nutr.Home page
S. Bo, M. Durazzo, S. Guidi, M. Carello, C. Sacerdote, B. Silli, R. Rosato, M. Cassader, L. Gentile, and G. Pagano
Dietary magnesium and fiber intakes and inflammatory and metabolic indicators in middle-aged subjects from a population-based cohort.
Am. J. Clinical Nutrition, November 1, 2006; 84(5): 1062 - 1069.
[Abstract] [Full Text] [PDF]


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J. Clin. Endocrinol. Metab.Home page
S. Devaraj, E. Chan, and I. Jialal
Direct Demonstration of an Antiinflammatory Effect of Simvastatin in Subjects with the Metabolic Syndrome
J. Clin. Endocrinol. Metab., November 1, 2006; 91(11): 4489 - 4496.
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S. D. de Ferranti, K. Gauvreau, D. S. Ludwig, J. W. Newburger, and N. Rifai
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