| Objective:To analyze the distribution of obesity, blood pressure and the relationship between them in Han adolescents of YanbianMethods:①A total of 1 658 Han adolescents were finally selected from four high schools in Antu County of Yanbian and the survey were carried out in April 2008 and 2009. All of students knew the informed consent.②Inquiries were performed in accordance with unified questionnaire (including the general information, eating habits, physical activity, smoking history, drinking history, family and social environment factors, etc.) and that was completed by the students.③Using Physical examination, all subjects were checked in the fasting and quiet state in the morning by unified apparatus and it was measured that the height (HT), weight (WT), waist circumference (WC), hip circumference (Hip) and blood pressure (systolic blood pressure, SBP; diastolic blood pressure, DBP), etc. All anthropometric indexes were measured on the base of the "Rules on The Physical Fitness and Health Research of China School Students" in 2005. Blood pressure (mmHg) is checked by the mercury sphygmomanometer. The body mass index (BMI, kg/m2), Waist hip ratio (WHR) and Waist height ratio (WHtR) was calculated as the evaluation of obesity in this study. Overweight and obesity was detected by the Working Group on Obesity in China (WGOC), 24 and 28 were used as cut-off points for overweight and obesity both for males and females aged 18 years. High blood pressure was detected by the Guidelines on Prevention and Treatment of Blood Lipid Abnormality in Chinese Adult, and that is SBP/DBP≥130/85 (mmHg). All subjects were divided into three subgroups as follows:isolated systolic high blood pressure (ISH), isolated diastolic high blood pressure (IDH) and systolic combined diastolic high blood pressure (SDH).④The measurement data were examined by T and ANOVA test; the numeration data were compared with the Chi square; the obesity and its influencing factors were analyzed by the multi-regression analysis; the correlation between BMI and physical indicators were analyzed by partial correlation analysis; the obesity influencing factors were analyzed by the multi-regression analysis; overweight and obesity as the dependent variable, Sex, WT, Hip, WHtR, high blood pressure as independent variables. Logistic regression analysis; the variables were selected by BACKWARD, selected variables were significant level asα= 0.05 and deleted variables were significant level asα= 0.10.Results:Out of 1 658 cases,771 cases (46.5%) were male, and 887 cases (53.5%) were female.①For boy, the level (kg/m2) of BMI was 23.67 in P85 and 26.21 in P95, respectively; for girl, which was 22.67 in P85 and 24.98 in P95, respectively. For boy, the level (mmHg) of SBP and DBP was 130.00 and 85.00 in P95,respectively; for girl, that was 120.10 and 85.00 in P95,respectively.②For boy, the average level of HT, WT, BMI, WC, Hip, SBP and DBP was 173.59±5.25,63.81±9.20,21.15±2.72,72.01±9.26,92.87±6.68,115.53±9.96 and 75.77±6.76 respectively; for girl, that was 161.11±4.97,53.09±7.24,20.44±2.50,66.24±8.32, 89.95±6.27,107.27±10.07 and 71.83±6.95, respectively, and there were significant sex differences (all P<0.01).③For boy, the level of WT, WC, Hip, WHR and WHtR increased along with the increase of BMI (all P＜0.01); for girl, that of HT, WT, WC, Hip and WHtR increased along with the increase of BMI (all P＜0.01). The level of SBP and DBP in both sexes increased along with the increase of BMI (all P＜0.05).④The detection rate of overweight was 11.2% in boys and 7.1% in girls, and that of the obesity was 13.5% in boys and 8.6% in girls, there were significant sex differences (all P＜0.01). For boy, the prevalence of high blood pressure, ISH, IDH and SDH was 20.8%,9.2%,8.9% and 2.6%; and that was 7.8%,2.8%,4.2% and 0.8%, respectively, and there were significant sex differences (all P<0.01).⑤For boy, the prevalence of high blood pressure, ISH and SDH in overweight and general obesity was significantly higher than that in normal weight, and that increased along with the increase of obesity (all P<0.01); for girl, the prevalence of high blood pressure, IDH and SDH in overweight and general obesity was significantly higher than that in normal weight, and that increased along with the increase of obesity (all P＜0.01).⑥There was a significant positive correlation between BMI and WT, WC, Hip, WHR, WHtR, SBP and DBP (all P＜0.01), and the value of the partial correlate coefficient was 0.893 (WT),0.548 (WC),0.584 (Hip),0.555 (WHtR),0.214 (SBP) and 0.142 (DBP); there was a weak positive correlation between BMI and WHR, the value of the partial correlate coefficient was 0.056 (P<0.05).⑦The results of multifactor analysis showed that the general obesity is closely related with Sex, WT, abdominal obesity, high blood pressure in Han adolescents of Yanbian, the value of OR is 81.052,1.520,6.457 and 1.985, respectively.Conclusion:①The average level of BMI of Han adolescents in this region was significantly lower than that of WGOC standard, and higher than other ethnic minority, and close to rich rural areas. The prevalence of overweight and obesity was significantly lower than that of Developed Country, and higher than other ethnic minority, and close to the big city.②The prevalence of high blood pressure was close to the urban areas in China, and there was significant sex difference.③The prevalence of high blood pressure (both sexes), ISH (boy), IDH (girl) and SDH (both sexes) increased along with the increase of obesity.④There was a significant positive correlation between BMI and WT, WC, Hip, WHR, WHtR, SBP and DBP.⑤The general obesity is closely related with gender, WT, abdominal obesity and high blood pressure.
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