Obesity Rev：英研究称用腰围身高比预测肥胖风险更精准

人们通常都使用身体质量指数（BMI）评估健康风险。不过，近日，一项英国研究显示，使用“腰围身高比”能更精准地评估肥胖带来的健康风险。相关研究成果刊登在了国际杂志Obesity Reviews上。
 
BMI值以身高、体重作为计算标准，可以帮助确认一个人的体重是正常的，还是过轻、过重。但从BMI值无法看出其他潜在危险，仅靠BMI值，很容易导致错误判断。例如，从BMI值看不出肌肉质量，有些人肌肉比较多，这些人很可能就被错误归类到肥胖族群。
 
研究人员对共有30万名男女参与的31项研究报告进行了评估。研究结果发现，“腰围身高比”比BMI值，以及单纯的腰围数字更能精确预测高血压、糖尿病和心脏病等与肥胖相关的疾病风险。
 
由英国伦敦城市大学卡斯商学院所进行的这项研究称，对一位30岁没有吸烟习惯的男性来说，如果腰围数字占身高一半以上，其寿命最多会缩短14%。研究人员建议，人们应尽量将腰围数字控制在身高一半以下，这样有助于延长人的寿命。（生物谷Bioon.com）

doi:10.1111/j.1467-789X.2011.00952.x
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Waist-to-height ratio is a better screening tool than waist circumference and BMI for adult cardiometabolic risk factors: systematic review and meta-analysis

M. Ashwell1,3,*, P. Gunn2, S. Gibson2

Our aim was to differentiate the screening potential of waist-to-height ratio (WHtR) and waist circumference (WC) for adult cardiometabolic risk in people of different nationalities and to compare both with body mass index (BMI). We undertook a systematic review and meta-analysis of studies that used receiver operating characteristics (ROC) curves for assessing the discriminatory power of anthropometric indices in distinguishing adults with hypertension, type-2 diabetes, dyslipidaemia, metabolic syndrome and general cardiovascular outcomes (CVD). Thirty one papers met the inclusion criteria. Using data on all outcomes, averaged within study group, WHtR had significantly greater discriminatory power compared with BMI. Compared with BMI, WC improved discrimination of adverse outcomes by 3% (P < 0.05) and WHtR improved discrimination by 4–5% over BMI (P < 0.01). Most importantly, statistical analysis of the within-study difference in AUC showed WHtR to be significantly better than WC for diabetes, hypertension, CVD and all outcomes (P < 0.005) in men and women. For the first time, robust statistical evidence from studies involving more than 300 000 adults in several ethnic groups, shows the superiority of WHtR over WC and BMI for detecting cardiometabolic risk factors in both sexes. Waist-to-height ratio should therefore be considered as a screening tool.