中国成人体质指数分布状况

根据 1992年第 3次全国营养调查资料 ,选取了 44 485例 2 0～ 6 0岁成人 ,对体质指数 (BMI)的性别、年龄分布进行了分析 ,并采用百分位数法对超重及肥胖的BMI界值进行了探讨。结果表明 ,我国成人BMI呈对数正态分布 ,均数为 2 2 1± 3 0 ,第 5 0、85和 95百分位数分别为 2 1 6、2 4 9和 2 7 4,其中第 85百分位数非常接近WHO推荐的超重界值 ,第 95分位数低于WHO肥胖的界值。BMI分布在年龄、性别、城乡之间都存在较大的差异。因此 ,作者建议在确定界值时应考虑性别、年龄的影响 ,并与发病率和死亡率、体脂含量等相联系

Distributions of body mass index of Chinese adults

Based on the Third China National Nutrition Survey conducted in 1992, the distribution of body mass index (BMI) in 44,485 adults aged 20-60 y was analyzed, and the cutoff points of BMI for overweight and obesity were also explored. The results showed that the BMI of Chinese adults was in logarithmic normal distribution. The average BMI of this population was 22.1 +/- 3.1. The 50th, 85th and 95th percentiles of BMI were 21.6, 24.9 and 27.4 kg/m2 respectively. The 85th percentile of BMI was much closer to the BMI cutoff points for overweight recommended by WHO, but the 95th percentile was much lower than WHO's cutoff points for obesity. The distribution of BMI based on age, gender and urban/rural areas was different and with statistical significance. It is considered that age and gender should be taken into account while setting up BMI cutoff points for the overweight and obesity of a population, as well as considering the relationships among BMI and morbidity and mortality, body fat composition, and some blood biochemical indexes.