Analysis of the obese status of adults from Guangxi in 2000

Qiwen CHEN

ABSTRACT

BACKGROUND:

Nowadays, the obesity has become a serious problem of public health in global sphere. The status of development of obesity in adults from different region and analysis on feature of risk population can instruct the prevention and treatment.

OBJECTIVE:

To analyze the status of obesity and the characteristics of the easy-attack obese people in adults from Guangxi so as to provide reference data for obese prevention and treatment in groups.

DESIGN:

Randomized cluster sampling, cross-sectional study.

SETTING:

Postgraduate School of Beijing Sport University.

PARTICIPANTS:

A total of 5 157 adults, aged from 20-59 years were selected from Nanning, Guilin and Yulin as observational subjects according to national physical fitness surveillance for national people and Guangxi citizens with randomized cluster sampling method in 2000.

METHODS:

Digital Electronic Height Meter and the RCS-160 Digital Electronic Weight Scale designated by China Center of National Physical Fitness Surveillance, were adopted to measure the height and body mass of the 5 157 participants, and then Body Mass Index (BMI) was calculated.Level of obesity of all participants was evaluated according to the evaluation criterion of obesity, made by WHO in 1997. Sex, age, profession, region, city, country and the situation of physical exercise, etc. were investigated according to the Logging Card of National Physical Fitness Surveillance in 2000. Single factor analysis of variance, t-test and contingency table chi-square test were performed on experimental data.MAIN OUTCOME

MEASURES:

Body Mass Index (BMI) and the rate of overweight.

RESULTS:

The number of people whose BMI≥25 kg/m2 was 1 028. ①The BMI of males and females were(2291±2.81) kg/m2 and (2237±2.96) kg/m2,respectively. It was higher in males than that of females(t=6.75,P ＜ 0.01),and both were lower than the weighted mean of nation, which were 23.34 kg/m2 and 22.93 kg/m2 (tm=-7.78, tl=-9.60,P ＜ 0.01), respectively. ②The rates of over-weight in males and females were 21.88% and 17.98%, respectively.The difference of gender was obvious, (Pearson Chi-Square=8.247, df=1, P ＜ 0.01). ③The mean value of BMI of people aged 20-24 years and the rate of overweight were the lowest. 20-34 years in males and 25-39 years in females were the swift growth period. Male in his 40-44 years and 55-59 years reached a maximum, respectively. Female in her 50-54 years also reached a maximum. The curve of BMI in males and females with the rate of over-weight got a first cross in the age of 40-44 years,and the BMI and the rate of females were higher than those of males. The second across occurred at the age of 55-59 years, and those of males were higher than those of females. ④The rate of overweight and mean value of BMI of samples from Guilin were higher than those of Nanning and Yulin (Pearson Chi-Square=13.579,df=2, P ＜ 0.01;F=12.328,P ＜ 0.01),and the obese severity was Guilin, Nanning and Yulin in order. ⑤The rate of overweight and mean value of BMI in farmers were much lower than those of urban citizens, and the difference was very obvious between city and countryside (Pearson Chi-Square=82.700-137.026,df=2, P ＜ 0.000;F=1 11.539,P ＜ 0.000).⑥Among people with different jobs, the rate of overweight in farmers was the lowest, both males and females(9.49% and 8.51%). For males, the order of the rate was taking service work (48.21%), in charge of an enterprise (40.91%) and clerk (36.34%). For females, the order was business woman (32.56%), worker for transportation (25.00%)and producer (24.38%), and the difference between all sorts of professions was obvious (Pearson Chi-Square=97.944-178.888,df=2, P ＜ 0.000).

CONCLUSION:

The level of obesity in Guangxi adults in 2000 is lower than the national average level. The distribution of obese population has relative obvious characteristics of difference on age, gender, locality, city,countryside and profession.