关键词: 体质指数, 腰围, 血压偏高, 儿童, 青少年

Abstract: Objective To examine the waist circumference (WC)'s predict role to elevate blood pressure (BP) among children and adolescents aged 7~17 years old who have normal body mass index (BMI),and provide scientific evidence for prevention and intervention of elevated BP in children and adolescents. Methods Data were combined from the China Health and Nutrition Survey,which was conducted during the period of 1993-2011.A total of 9 038 children and adolescents aged 7~17 years old who had normal BMI were included in the final data analysis.Data were on gender,age,WC,systolic blood pressure (SBP),diastolic blood pressure (DBP),and the prevalence of elevated BP.After adjusted for sex and age,the multiple liner regression model was used to analyze the trend in mean BP with increase of WC levels.Logistic regression model was conducted to examine the trend in elevated BP prevalence and the risk of elevated BP with increase of WC levels. Results Both the mean value of BP and prevalence of elevated BP showed rising trends with the increase of WC levels among children and adolescents with normal BMI (SBP/DBP ranged from 96.0/63.1 mmHg to 102.4/ 68.0 mmHg; prevalence of elevated BP ranged from 6.9% to 21.8%,all P<0.001),independently of age and sex.When WC<P₂₅ as the referent group,the risk for elevated BP were1.39,1.70,2.21 and 3.10,for groups of WC≥P₂₅ and WC<P₅₀,WC≥P₅₀ and WC<P₇₅,WC≥P₇₅ and WC<P₉₀,and WC≥P₉₀,respectively,independently of age and sex(P<0.01). Conclusions WC can be used as an important predictor of elevated BP in children and adolescents.BMI should be in combined with WC in order to more effectively prevent risk of elevated BP in children and adolescents.

Key words: body mass index, waist circumference, elevated blood pressure, children, adolescents