| Objective (s):To compare the difference in prevalence of obesity and central obesity and its related factors among Buyi, Yi and Bai ethnic minorities in Yunnan province. And, to explore the relationship between obesity, central obesity and hypertension, providing a scientific basis for prevention and control of the obesity, central obesity and hypertension.Methods:This study is a cross-sectional sampling survey. Probability proportional to size(PPS) sampling method was used to select a representative sample of 1145 ethnic minorities aged 18 years and over from six typical minority township of Buyi, Yi and Bai in Luoping, Tonghai, Yulong County. Questionnaire survey and physical examination were carried out among the participants. Questionnaire contents include basic demographic characteristics, diet, smoking, alcohol consumption and the disease history of hypertension. Physical indicators include weight, height, waist circumference, systolic blood pressure(SBP), diastolic blood pressure(DBP), according to the standards and methods of "Chinese adults’overweight and obesity prevention and control guidelines" and "Chinese Hypertension Prevention guidelines 2010". SPSS 17.0 software was using for statistical analysis, using chi-square test and t test or analysis of variance for count and measurement data respectively. The data does not meet the applicable conditions of the above methods using the rank sum test. Obesity, central obesity related factors and the relationship between obesity, central obesity and hypertension analyzed by correlation analysis and binary Logistic regression. Taking α-0.05 as significance level.Results:There were 1145 copies of valid questionnaires, the rate of response was 95.4%. The total prevalence of obesity was 6.7%, central obesity was 45.2%, Buyi, Yi, Bai was 11.5%,5.6%,3.1%, and 48.0%,37.3%,50.4% respectively. Buyi’s prevalence of obesity was higher than Bai, Yi (χ2= 22.839, P<0.01), Buyi’s and Bai’s prevalence of central obesity were higher than Yi(χ2= 14.940, P<0.01), Women’s prevalence of central obesity was higher than men (χ2= 20.365, P<0.05). The total rate of prehypertension was 40.3%, prevalence of hypertension was 20.7%, which Buyi, Yi, Bai was respectively 38.8%,37.6%,44.4%, and 13.6%,24.0%, 24.4%. Bai’s rate of prehypertension was higher than Buyi, Yi(χ2=11.808, P<0.01), male’s higher than females (χ2= 18.567, P<0.05), Bai’s, Yi’s prevalence of hypertension were higher than Buyi (χ2= 17.309, P<0.01), male’s higher than females (χ2= 10.61, P<0.05). All types of obesity had higher prevalence of hypertension than those without, especially both obesity and central obesity (χ2= 55.634, P<0.01). The prevalence of obesity and central obesity increasing with age (obesity trend, χ2= 7.995; central obesity trend, χ2= 22.043, P<0.05).The prevalence of obesity increasing with the degree of education and income (the former χ2= 7.995, the latter χ2= 4.227, P<0.05, for trend).Logistic regression analysis showed that related factors of obesity had sex, degree of education, to eat meals on time, drinking less100g each time and 5 times and more per week, odds ratio were 0.512 (95%CI:0.297-0.884),0.746 (95%CI:0.564-0.987),0.335 (95%CI:0.202-0.554),0.233 (95%CI:0.080-0.676),0.251 (95%CI:0.074-0.853). That related factors of central obesity were gender, age (45 and above age groups), educational level, the higher frequency of eating oily fatty foods, odds ratio were 2.006 (95%CI:1.552-2.593),2.384 (95%CI:1.591-3.571),2.603 (95%CI:1.640-4.132),1.203 (95%CI:1.036-1.379),1.572 (95%CI:1.226-2.016). Related factors of hypertension were age (45-and 60-age groups), salty food, smoking (quit smokers, current smokers), body type (simple obesity, central obesity alone, combination of both), in which obese, simple central obesity, combination of both had higher risk of suffering from hypertension, odds ratio were 4.550 (95%CI:1.172-17.659),3.140 (95%CI:2.128-4.631),8.069 (95%CI:3.782-17.214).Conclusion(s):There were significant differences in prevalence of obesity, central obesity among three ethnic minority groups, and the prevalence was increasing. Buyi had higher prevalence of obesity and central obesity, Bai had higher prevalence of central obesity. Bai, Yi had higher prevalence of hypertension, and the three ethnic group had a higher proportion of high-risk hypertension, it is necessary for according to the actual prevalence in the region to determine the points of disease control and prevention. Both obesity and central obesity were the risk factors for hypertension, it should take measures to lose obese patients’body weight, while strengthening health education and promoting health knowledge into health beliefs and health behaviors, reducing obesity, central obesity and hypertension risk factors to prevent related diseases. |
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