Abstract 13485: Dairy Product Consumption and Blood Pressure in Children
Background: Identifying dietary factors associated with blood pressure (BP) in children and adolescents could help guide recommendations for the prevention of elevated BP. Our objective was to examine the association between intake of dairy products and blood pressure using baseline data from an ongoing cohort study.
Methods: Participants were 552 children aged 8-10 years with complete data from the Quality cohort, a longitudinal study assessing cardio-metabolic risk among Caucasian children from the province of Quebec (Canada), with at least one obese parent. Five consecutive readings of BP were obtained after a 5 minute rest using an oscillometric device and the mean value of the last three readings was used to define systolic and diastolic BP (SBP-DBP). Children's average dairy intake assessed from three non-consecutive 24-hour dietary recalls (2 days in the week and one day in the weekend) were divided into tertiles. Linear regression models were adjusted for age, sex, height, physical activity level, total energy intake, calcium and sodium intake, percent of energy from saturated fat, fruits and vegetables intake, sweetened beverages, parental history of hypertension, parental education, child weight status (obese, overweight, normal by CDC definitions), and for the interaction between child weight status and dairy consumption.
Results: Approximately one-third (36%) were overweight or obese (n=228). SBP and DBP means (SD) were 93.8 (8.1) and 48.5 (5.1) mmHg, respectively. Compared to the lowest tertile of dairy intake, the middle and highest tertiles were associated with 2.4 mmHg, and 2.0mmHg lower SBP, respectively and 2.1mmHg and 1.4mmHg lower DBP, respectively, among normal weight children (all p<0.05). At all dairy product intake levels, overweight/obese children had higher SBP and DBP than normal weight children (all p<0.05 except SBP in overweight/obese children with high dairy intake, p<0.09). Among overweight/obese children, tertiles of dairy product intakes were not associated with either SBP or DBP.
Discussion: These results suggest that higher dairy intake is associated with lower BP but only in children who are not overweight or obese.
- © 2011 by American Heart Association, Inc.