Department of Human Ecology, Cinvestav-Merida, Merida, Yucatan, Mexico.
Indian J Pediatr. 2012 May;79(5):640-6. doi: 10.1007/s12098-011-0580-0. Epub 2011 Oct 20.
To understand age-sex variation of stature and upper arm length (UAL) and to estimate stature from UAL through prediction equations.
A cross-sectional study was undertaken in 2006-2007 among 458 children (218 boys and 240 girls) aged 4.0 to 6.92 y of south Merida in Yucatan, Mexico.
The results show significant age variation (p < 0.001) of stature and upper arm length (UAL) in children. Boys show significantly higher mean stature and UAL compared to the girls. Relative proportion of upper arm length to stature is greater in boys. Interrelationship between stature and upper arm length exhibits significant association with respect to age and sex of children. Reconstruction of stature from upper arm length through regression analysis also gives good prediction models for separate and combined samples of both sexes with age. Regression coefficients for UAL predicting stature account for 0.90 or greater variance in the dependent variable (stature). The difference between reconstructed stature and the actual measurement is less than ±2.00 cm.
UAL appears to be a reliable indicator to estimate stature in children aged 4.0 to 6.92 y old.
了解身高和上臂长（UAL）的年龄性别差异，并通过预测方程从 UAL 估算身高。
2006-2007 年在墨西哥尤卡坦州南部梅里达进行了一项横断面研究，共纳入 458 名年龄为 4.0 至 6.92 岁的儿童（218 名男孩和 240 名女孩）。
结果表明，儿童的身高和上臂长（UAL）随年龄有显著变化（p<0.001）。与女孩相比，男孩的平均身高和 UAL 显著更高。男孩的上臂长与身高的相对比例较大。身高与上臂长之间的相互关系显示出与儿童年龄和性别的显著关联。通过回归分析从上臂长重建身高也为男女单独和组合样本提供了良好的预测模型。用于预测身高的 UAL 回归系数可以解释因变量（身高）的 0.90 或更高的方差。重建身高与实际测量值之间的差异小于±2.00cm。
UAL 似乎是估算 4.0 至 6.92 岁儿童身高的可靠指标。
