Using body mass index Z-score among severely obese adolescents: A cautionary note
Using body mass index Z-score among severely obese adolescents: A cautionary note
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DOI：
10.3109/17477160902957133
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发表时间：
2009-01-01
影响因子：
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通讯作者：
Woo, Jessica G.
中科院分区：
文献类型：
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作者：
Woo, Jessica G.
超过17%的12-19岁的美国儿童肥胖，导致区分严重肥胖青少年的体重状况的新问题。使用CDC 2000生长曲线和已发表的方程，本研究强调了在涉及严重肥胖青少年的临床研究中使用体重指数（BMI）Z评分作为结局指标的陷阱。在BMI为40以上（这是青少年治疗计划的典型值），BMI的大范围转化为BMI Z分数的非常窄的范围，并且BMI Z分数表现出类似于BMI Z分数的上限。在这个水平上，BMI和BMI Z评分之间的对应关系因年龄、性别和起始BMI而异。因此，青春期稳定的高BMI导致男孩BMI Z分数增加，女孩BMI Z分数降低。可能需要一个新的补充BMI参考，特别是对于严重肥胖的青少年，以改善测量和评估这一组的治疗成功。
Over 17% of US children aged 12-19 years are obese, leading to new issues in differentiating weight status among severely obese adolescents. Using the CDC 2000 growth curves and published equations, this study highlights the pitfalls of using body mass index (BMI) Z-score as an outcome measure in clinical research involving severely obese adolescents. Above BMIs of 40, which are typical for adolescent treatment programs, a wide range of BMI translates to a very narrow range of BMI Z-scores, and BMI Z-scores exhibit an upper limit similar to BMI percentiles. At this level, the correspondence between BMI and BMI Z-score differs by age, sex and starting BMI. Thus, a stable high BMI during adolescence results in increasing BMI Z-scores for boys and decreasing BMI Z-scores in girls. A new supplemental BMI reference may be needed specifically for severely obese adolescents to improve measurement and evaluation of treatment success in this group.