Division of General Internal Medicine, School of Public Health, University of California, Los Angeles, CA, USA.
J Occup Environ Med. 2012 Jul;54(7):816-9. doi: 10.1097/JOM.0b013e3182572e53.
To assess the accuracy of body mass index (BMI) as a measure of obesity compared with percent body fat (%BF) directly measured by dual energy x-ray absorptiometry among retired football players.
The level of agreement between BMI and %BF as measures of obesity was assessed by sensitivity, specificity, and the kappa statistic among 129 retired football players. Logistic regression was used to investigate the association between obesity and selected comorbidities.
Using BMI 30 kg/m or higher to identify obesity had poor specificity (0.36): 87 of 129 subjects were classified as obese, yet only 13 were truly obese based on %BF. Although BMI did not reliably indicate true %BF-obesity, BMI-obesity was significantly correlated with lineman position (P < 0.0001), years played (P = 0.03), and obstructive sleep apnea (P = 0.0005).
Percent body fat measured by dual energy x-ray absorptiometry provides a more accurate measure of obesity than does BMI among retired football players.
评估体重指数 (BMI) 作为衡量肥胖的指标的准确性，与通过双能 X 射线吸收法直接测量的体脂肪百分比 (%BF) 进行比较，对象为退役足球运动员。
通过灵敏度、特异性和kappa 统计评估 129 名退役足球运动员中 BMI 和 %BF 作为肥胖衡量指标的一致性。使用逻辑回归研究肥胖与选定合并症之间的关系。
使用 BMI 30kg/m 或更高来确定肥胖时特异性较差（0.36）：129 名受试者中有 87 名被归类为肥胖，但根据 %BF，只有 13 名是真正肥胖。虽然 BMI 不能可靠地指示真正的 %BF 肥胖，但 BMI 肥胖与线卫位置（P<0.0001）、参赛年限（P=0.03）和阻塞性睡眠呼吸暂停（P=0.0005）显著相关。
在退役足球运动员中，通过双能 X 射线吸收法测量的体脂肪百分比比 BMI 提供了更准确的肥胖衡量指标。
