Ceccarelli Gabriele, Bellato Massimo, Zago Matteo, Cusella Gabriella, Sforza Chiarella, Lovecchio Nicola
Department of Public Health, Experimental Medicine and Forensic, Center for Health Technologies (C.H.T.)-Human Anatomy Unit, University of Pavia, Pavia, Italy.
Department of Electrical, Computer and Biomedical Engineering, Laboratory of Bioinformatics, Mathematical Modelling and Synthetic Biology, University of Pavia, Pavia, Italy.
Ann Hum Biol. 2020 May;47(3):237-243. doi: 10.1080/03014460.2020.1738551. Epub 2020 Mar 18.
The use of body mass index (BMI) could lead to over/under estimation of fat mass percentage (FM%). An alternative index (inverted BMI, iBMI) has been proposed as a better estimator of FM% in adults, while its practical feasibility in children and adolescents has not been fully investigated. To examine if iBMI can better estimate FM% than BMI in children/adolescents. Height, weight, and triceps and subscapularis skinfolds were measured in 6686 schoolchildren aged 11-14-years-old. BMI and iBMI (squared height/weight) were calculated; FM% was estimated by skinfold thicknesses. The Pearson correlation coefficient and the coefficient of determination were obtained to test the best regression model between the indexes and FM%. FM% was linearly related to both indexes with R2 values that were overall > 0.7. No significant differences among the R2 values were found ( value = .2, ANOVA). BMI persists as a robust index for health surveillance screening in children/adolescents, being very intuitive and ready-to-use. Inverted BMI may be more accurate within a cohort of adults who experience only ponderal modifications, directly implicated in the variation of FM. In conclusion, the BMI remains a quick, handy and intuitive predictor of FM%.
身体质量指数（BMI）的使用可能导致对体脂百分比（FM%）的高估或低估。一种替代指数（倒置BMI，iBMI）已被提出，作为成人FM%的更好估计指标，而其在儿童和青少年中的实际可行性尚未得到充分研究。目的是检验在儿童/青少年中，iBMI是否比BMI能更好地估计FM%。对6686名11至14岁的学童测量了身高、体重、肱三头肌和肩胛下皮褶厚度。计算了BMI和iBMI（身高平方/体重）；通过皮褶厚度估计FM%。获得了Pearson相关系数和决定系数，以检验各指数与FM%之间的最佳回归模型。FM%与这两个指数均呈线性相关，R2值总体>0.7。未发现R2值之间存在显著差异（P值=0.2，方差分析）。BMI仍然是儿童/青少年健康监测筛查的可靠指标，非常直观且易于使用。倒置BMI在仅经历体重变化、直接与FM变化相关的成年人群体中可能更准确。总之，BMI仍然是FM%的快速、便捷且直观的预测指标。
