BMI z-Scores are a poor indicator of adiposity among 2- to 19-year-olds with very high BMIs, NHANES 1999-2000 to 2013-2014.
BMI z-Scores are a poor indicator of adiposity among 2- to 19-year-olds with very high BMIs, NHANES 1999-2000 to 2013-2014.
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DOI：
10.1002/oby.21782
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发表时间：
2017-04
期刊：
影响因子：
--
通讯作者：
Ogden CL
中科院分区：
文献类型：
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作者：
Freedman DS;Butte NF;Taveras EM;Lundeen EA;Blanck HM;Goodman AB;Ogden CL
虽然CDC增长图表被广泛使用，但众所周知，BMIz在第97个百分位数以上是没有信息的。我们比较了BMI和其他BMI指标（%BMIp95，第95百分位的百分比，ΔBMIp95， BMI减去第95百分位）与周长、皮肤褶皱和脂肪量的关系。我们对严重肥胖儿童（%BMIp95≥120）的差异特别感兴趣。我们使用了从1999-2000年到2013-14年在NHANES中接受检查的30,003名2至19岁青少年的数据。基于生长图的理论最大BMIz在不同年龄变化超过3倍。BMI指标有很强的相关性，但BMI与肥胖指标的相关性不如ΔBMIp95和%BMIp95强。在严重肥胖的儿童中，周长和肱三头肌皮褶与BMIz几乎没有关联（r≤0.10），而与%BMIp95和ΔBMIp95的关联范围为r=0.32 ~ 0.79。在8- 19岁的人群中，脂肪量÷身高2的相关系数r=0.40 （bmi）至r=0.82 （%BMIp95）。在严重肥胖的儿童中，bmi与身体肥胖的其他指标只有微弱的关联。非常高的bmi应该相对于CDC的第95百分位数表示，特别是在评估肥胖干预的研究中。
Although the CDC growth charts are widely used, BMIz is known to be uninformative above the 97th percentile. We compared the relations of BMIz and other BMI metrics (%BMIp95, percent of 95th percentile, and ΔBMIp95, BMI minus 95th percentile) to circumferences, skinfolds and fat mass. We were particularly interested in the differences among children with severe obesity (%BMIp95 ≥ 120). We used data from 30,003 2- to 19-year-olds who were examined from 1999-2000 through 2013-14 in NHANES. The theoretical maximum BMIz based on the growth charts varied by more than 3-fold across ages. The BMI metrics were strongly intercorrelated, but BMIz was less strongly related to the adiposity measures than were ΔBMIp95 and %BMIp95. Among children with severe obesity, circumferences and triceps skinfold showed almost no association with BMIz (r ≤ 0.10), whereas associations with %BMIp95 and ΔBMIp95 ranged from r=0.32 to 0.79. Corresponding associations with fat mass ÷ height2 ranged from r=0.40 (BMIz) to r=0.82 (%BMIp95) among 8- to 19-year-olds. Among children with severe obesity, BMIz is only weakly associated with other measures of body fatness. Very high BMIs should be expressed relative to the CDC 95th percentile, particularly in studies that evaluate obesity interventions.