Abstract P352: Trends in the Type of Coronary Heart Disease Hospitalizations: Increasing Proportions of Chronic Forms, Especially among the Elderly
Background: Time trends in event rates of acute myocardial infarction (AMI) show encouraging declines. We studied trends in rates and characteristics of coronary heart disease (CHD) hospital admissions in the Netherlands between 1998 and 2007.
Methods: The national Dutch hospital discharge register was used to identify the first CHD admission of individuals in 28 days (ICD-9 code 410-414). Age-standardized time trends in hospitalization rates of 188,266 AMI (ICD-9 410), 294,374 unstable angina (ICD-9 411, 413) and 203,881 chronic forms of CHD (ICD-9 414) admissions were examined using Poisson regression. Characteristics of patients in 1998 were compared with 2007.
Results: Between 1998 and 2007, the total age-standardized CHD hospitalization rate declined from 688 to 545 per 100,000 in men and from 281 to 229 per 100,000 in women. The annual percentage change in hospitalization rates was larger for AMI (men: -5.1%, women: -4.4%) than for unstable angina patients (men: -2.0%, women: -2.0%). For chronic CHD, the average annual percentage change was +0.5% in men and +2.1% in women. However, a rapid increase in chronic CHD hospitalization rates was particularly observed between 2001 and 2004, mainly accounted for by persons aged ≥65 years. The proportion of chronic CHD in the total of CHD admissions increased between 1998 and 2007 from 29% to 36% in men and from 23% to 30% in women (see Figure 1).
Conclusions: An increasing proportion of CHD hospital admissions in the Netherlands was for chronic forms of CHD. This may probably be accounted for by the increased use of revascularization procedures, especially among the elderly.
- © 2013 by American Heart Association, Inc.