Study on the relationship of blood pressure with BMI,FMP and waist circumference among children and adolescents in Beijing

Objective To analyze the relationship between blood pressure and BMI,waist circumference(WC) and fat mass percentile(FMP) among children and adolescents(7～17 years) in Beijing. Methods As part of the Beijing Children and Adolescent Metabolic Syndrome Study(BCAMS),data of weight,height,FMP,WC,and blood pressure were collected from 19 488 subjects aged 7～17 years from April to October in 2004. Overweight and obesity were defined according to BMI,WC and FMP criteria. Analyze the relationship between blood pressure and BMI,WC and FMP,as well as the change and trend of hypertension. Results The levels of SBP and DBP increased in the order of normal weight to overweight and obesity. With age and gender controlled,BMI,WC and FMP were independently positively correlated with SBP and DBP (P 0.001). The incidence of hypertension was significantly higher in the BMI,WC and FMP overweight and obesity groups than in the normal group,and the difference had statistical significance. The relative risk of hypertension in the obesity group is 3 to 7 times that of the normal group,and the risk in BMI obesity/FMP obesity group and the BMI obesity/abdominal obesity group was 7.3 and 6.8 times that of the normal group respectively.Conclusion BMI,WC and FMP are closely related to SBP and DBP in children and adolescents. BMI is a better index for hypertension:the heavier the childrn,the higher the risk of hypertension.