摘要
目的探讨卧床老年患者体质指数(BMI)与相关营养学指标的关系,建立利用相关营养学指标推算卧床老年患者BMI的方程。方法采集330例住院老年患者的营养学指标,将BMI与上述指标进行相关性分析,采用多元逐步回归分析寻求BMI最佳替代值的回归方程,并对回归方程的预测能力进行ROC曲线诊断试验评价。结果大多数营养学指标与BMI的相关性较好(P<0.05,P<0.01);以上臂围、小腿围、身高为自变量建立的三元回归方程对BMI有较好的预测效果;ROC曲线下面积为0.901。结论以上臂围、小腿围、身高为自变量建立的三元回归方程预测卧床老年患者的BMI值简单经济、适用性较强。
Objective To explore the relationship between body mass index（BMI） and nutritional indexes in bedridden elderly patients, and to establish a regression equation for predicting BMI by using these indexes.Methods The nutritional indexes were collected from 330 bedridden elderly patients. Pearson′s analysis was used to calculate the correlation between the BMI and nutritional indexes, and stepwise multiple linear regression analysis was performed by using BMI as the dependent variable and nutritional indexes as the independent variables. The regression equation was estimated by using receiver operating characteristic （ROC） curve analysis.Results Pearson′s analysis revealed that most nutritional indexes were significantly correlated with the BMI（P〈0.05,P〈0.01）. Stepwise multiple linear regression analysis indicated that upper arm circumference, calf circumference and body height were the major independent predictors of BMI; the area under the ROC curve was 0.901.Conclusion Upper arm circumference, calf circumference and body height are strong predictors of BMI in bedridden elderly patients. The regression equation is simple and practical.
关键词
老年卧床患者
体质指数
营养指标
多元回归分析
bedridden elderly patients
body mass index
nutritional index
multiple regression analysis
