Objective To investigate the body fat percentage and BMI at different ages in adult physical examination population from Tianjin binhai new area,and to analysis the detection accuracy in determination of overweight by body fat percentage or BMI. Methods We selected total 2,198 people,whose physical examination was healthy,inclouding youth group (20 to 39 years old,566 male and 400 female),middle-aged group (40 to 59 years old,645 male and 456 female),and elderly group (≥ 60 years old,77 male and 54 female) from tianjin binhai new area. Results The average of body fat percentage detection was more than the normal range in each age stage,and increased as the growth of age;The overweight detection ratio using the method of body fat percentage was significantly higher than BMI method,and the excessive percentage of body fat in middle-aged men reached to 84.9%,and 81.5%in elderly women. The missed detection ratio increased and might appeared misjudgment of muscle overweight with the growth of age. The overweight ratio using body fat percentage method in elderly men,which was normal with BMI method, reached to 77.3%,and 75.0% in elderly women;The overweight ratio using BMI method in young men,but normal with body fat percentage method,was 9.7%. Conclusion BMI method might result in the misjudgment due to the limitation of age and exercise in the determination of overweight. But body fat percentage method can reflect whether the fat is overweight ,and body fat percentage is useful to nutrition assessment and therapy and sport instruction.%目的 调查天津滨海新区健康体检人群不同年龄段成年人体脂百分比及体质量指数(BMI)情况,分析BMI及体脂百分比检测法对超重判定的准确率.方法 选取2015年3月~2015年12月在本院参加健康体检的天津滨海新区居民2198例,其中青年组(20~39岁)男性566例、女性400例,中年组(40~59岁)男性645例、女性456例,老年组(≥60岁)男性77例、女性54例,对其进行BMI及体脂肪比例检测及分析.结果 滨海新区健康体检居民在体脂百分比检测中各年龄阶段平均值均超过正常范围,且体脂百分含量随着年龄的增长而增长.体脂百分比法的超重检出率明显高于使用BMI检测法的超重检出率,其中中年男性体脂百分比超标率达到84.9%,老年女性体脂百分比超标率达到81.5%.随着年龄的增长,BMI检测法出现的漏检率增加,并且会出现肌肉超重型的误判,在BMI正常的中老年男性人群中体脂百分比超标率达到77.3%,而老年女性达到75.0%;对于BMI超标的青年男性人群中体脂百分比正常的比率为9.7%.结论 在超重的判定中,BMI受年龄、运动情况的限制会造成误判情况,而脂肪百分比检测可以更准确反映脂肪情况及是否超重,更有助于营养评估和运动指导及患者的临床营养治疗.
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