Hung Shang-Ping, Chen Ching-Yu, Guo Fei-Ran, Chang Ching-I, Jan Chyi-Feng
Department of Family Medicine, Chi Mei Liouying Hospital, No. 201, Taikang, Liuying Dist., Tainan City 736, Taiwan, ROC.
Department of Family Medicine, National Taiwan University Hospital, College of Medicine, National Taiwan University, No. 7, Chung San South Rd., Taipei 100, Taiwan, ROC; Institute of Population Health Sciences, National Health Research Institutes, 10F., No.3, Park St., Nangang Dist., Taipei City 115, Taiwan, ROC.
Obes Res Clin Pract. 2017 Jan-Feb;11(1):11-18. doi: 10.1016/j.orcp.2016.02.005. Epub 2016 Mar 2.
Obesity screening among young adult groups is meaningful. Body mass index (BMI) is limited to discriminate between fat and lean mass. Asian young adult group tends to have lower BMI and higher body fat percentage (BFP) than other ethnic groups. Accuracy of obesity screening by commonly used BMI criteria is unclear in young Taiwanese population.
A total of 894 young adults (447 males and 447 females) aged 20-26 were recruited. BMI, regional fat percentage and BFP determined by bioelectrical impedance analysis (BIA) were measured. BMI cutoff points were based on the criteria adopted by the Ministry of Health and Welfare in Taiwan. Cutoff points of low or high BFP were defined as 24% in men and 31.4% in women.
Prevalence of BFP defining obesity was 14.8% in young men and 27.3% in young women. 23.2% of young men and only 8.3% of young women were classified to overweight or obesity categories according to the BMI criteria. Disagreement was noticed mainly among overweight males and normal weight females. 68.7% of BMI defining overweight young men had low BFP; however, 29.7% of young women of BMI defining normal group had high BFP. Up to 69.7% of young women with high BFP would be missed by BMI category only.
Disagreement between BMI and BFP was significant among young adults, especially young women. We suggest combining BMI and BIA for obesity and overweight screening in Asian young adults.
在年轻成年人群体中进行肥胖筛查具有重要意义。身体质量指数（BMI）在区分脂肪量和瘦体量方面存在局限性。亚洲年轻成年人群体的BMI往往低于其他种族群体，而体脂百分比（BFP）则较高。常用的BMI标准在台湾年轻人群体中进行肥胖筛查的准确性尚不清楚。
共招募了894名年龄在20 - 26岁之间的年轻成年人（447名男性和447名女性）。测量了通过生物电阻抗分析（BIA）测定的BMI、局部脂肪百分比和BFP。BMI的切点基于台湾卫生福利部采用的标准。低BFP或高BFP的切点定义为男性24%，女性31.4%。
根据BFP定义肥胖的患病率在年轻男性中为14.8%，在年轻女性中为27.3%。根据BMI标准，23.2%的年轻男性和仅8.3%的年轻女性被归类为超重或肥胖类别。主要在超重男性和正常体重女性中发现了不一致情况。根据BMI定义为超重的年轻男性中，68.7%的人BFP较低；然而，根据BMI定义为正常组的年轻女性中，29.7%的人BFP较高。仅通过BMI类别会遗漏高达69.7%的BFP高的年轻女性。
在年轻成年人中，尤其是年轻女性中，BMI和BFP之间的不一致性很显著。我们建议在亚洲年轻成年人中结合BMI和BIA进行肥胖和超重筛查。
