Study On Relationship Between Anthropometric Indices And Blood Pressure In Children And Adolescents In Hubei Province

ObjectiveTo describe the development of anthropometric indices of children andadolescents in Hubei Province and to study the relationship between these indices andblood pressure, so as to provide evidence for screening hypertension.MethodsOur study was based on the2010National Survey on Students’ Physical Fitnessand Health in Hubei Province. A total of12883students aged7~17were recruitedthrough a stratified cluster sampling. Height, weight, waist circumference, skin-foldthickness were measured. BMI, waist-to-height ratio were calculated from height,weight and waist circumference. Percentage of body fat was calculated from tricepsand subscapular skin-fold thickness through Suzuki equation. T–test was used toanalyze the differences in anthropometric indices between boys and girls. ANOVA,χ2-test, correlation, ROC and multi-linear regression were used to analyze relationshipbetween anthropometric indices and blood pressure.Results1. It was shown that BMI, WC, LBW increased with age in both rural and urbanstudents. Gender differences in these three indices were statistically significant, boysseemed to show a higher level than girls. As for skin-fold thickness, gender differences were not statistically significant before12-year-old, however, it turned outto be statistically differences between boys and girls after12-year-old (P<0.05). Girlsseemed to have a higher percentage of body fat than boys (P<0.05).2. Blood pressure (SDP&DBP) showed an increase tendency with age in bothrural and urban students. Gender differences in SBP were statistically significant. Theprevalence of high DBP was4.34%(4.46%for boys,4.22%for girls), and theprevalence of high SBP was3.60%(4.33%for boys,2.89%for girls).3.①The prevalence of high DBP and SBP in control group, overweight groupand obesity group were3.85%,7.56%,11.78%, and2.78%,8.26%,15.27%respectively;②The prevalence of high DBP and SBP in WC＜P25group, P25≤WC＜P75group, WC≥P75group were1.89%,4.18%,7.67%and1.53%,2.48%,8.32%respectively;③The prevalence of high DBP and SBP in WHtR＜0.5group,WHtR≥0.5group were4.18%,9.50%and3.09%,13.03%respectively;④Theprevalence of high DBP and SBP in control group, mild obesity group, moderateobesity group and severe obesity group were3.46%,7.42%,8.68%,14.05%and2.59%,5.90%,7.99%,16.99%respectively.4. In partial analysis, WC showed the closest correlation with blood pressure.The partial correlation coefficients with SBP and DBP were0.278and0.166respectively (P<0.01). WC showed the largest AUCs (0.669for high DBP for boys,0.723for high DBP for girls,0.630for high SBP for boys,0.643for high SBP forgirls).In multi-linear regression, WC had a largest standard partial regressioncoefficient.Conclusions1. Gender differences in anthropometric indices between boys and girls in HubeiProvince were statistically significant. Boys showed a higher level in BMI, waistcircumference and lean body fat, meanwhile girls had a larger skin-fold thickness andpercentage of body fat.2. The prevalence of high DBP was4.34%and the prevalence of high SBP was 3.60%.3. All the four anthropometric indices could predict hypertension in children andadolescents. WC showed the closest relationship with hypertension.