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利用１９８５～１９８９年我国７省９个县的２６１７１名及１９９０年２７省１０１个县的６８８７６名１～５岁儿童体重和上臂围数据，对国际上采用的诊断１～５岁儿童营养不良的上臂围界限值（＜１２．５ｃｍ为重度营养不良，１２．５～１３．５ｃｍ为中度营养不良）进行分析。结果表明１～５岁儿童用同一上臂围界限值灵敏度随年龄增长而下降，而特异度则随年龄的上升而上升，提示随年龄的增长漏检率越来越高。经判别分析提出各年龄组的上臂围界限值，但其漏检率和误判率也在３０％左右，本研究结果说明上臂围不是评价学龄前儿童营养不良的理想指标。
Using the data of 26171 from 9 counties in 7 provinces of China and 68876 children aged 1 to 5 years from 9 counties in 7 provinces in China from 1990 to 1989 and the upper arm circumference data of 68876 children aged 1 to 5 years, Upper arm circumference limit (<12.5cm for severe malnutrition, 12.5 ~ 13.5cm for moderate malnutrition) were analyzed. The results showed that the limit of sensitivity of 1 ~ 5-year-old children with the same upper arm decreased with age, while the specificity increased with the rise of age, suggesting that the rate of undetected leakage increased with age. According to the discriminant analysis, the limit of the upper arm circumference in each age group was proposed, but the undetected rate and false positive rate were also around 30%. The results of this study indicate that upper arm circumference is not an ideal indicator to evaluate malnutrition in preschool children.