用主成分法评价学龄前儿童的营养状况

Application of principal component analysis in evaluating nutritional status of preschool children

目的 用主成分法评价学龄前儿童营养状况 ,并与kaup指数法相比较。 方法 用分层整群随机抽样的方法在合肥市抽取 8所幼儿园 ,分别测量儿童的身高、体重值 ,按照 5类分级标准分别采用主成分法及kaup指数法对儿童的营养状况进行评价 ,并与身高标准体重法相比较。结果 一致性检验结果表明 ,主成分法和kaup指数法存在一致性 (P <0 0 1)。配对McNemar检验表明 ,两者的肥胖检出率有显著性差异 (P <0 0 1)。主成分法的肥胖检出率(3 2 1% )明显高于kaup指数法 (0 63 % )。 结论 在评价学龄前儿童的营养状况尤其是儿童肥胖时 ,主成分法是较好的方法。

Objective To compare the effects of principal component a nalysis and Kaup index in evaluating nutritional status of preschool children. Methods Eight kindergartens were selected randomly in Hef ei by using stratified cluster sampling method.Body heights and body weights of children were measured,and their nutritional status were evaluated using princip al component analysis and Kaup index respectively according to five-class criter ia,then the two methods were compared with method of weight for height. Results The test of consistency showed that there was con sistency between principal component analysis and Kaup index ( P <0.01),meanwh ile,McNemar test indicated that there was a significant difference between them in the rate of obesity detected.Principal component analysis showed higher obesi ty prevalence than Kaup index (3.21% vs.0.63%). Conclusion Principal component analysis was a better meth od for evaluating nutritional status of preschool children,especially for evalua ting childhood obesity.