山东省4326名7～12岁儿童体成分指数与血压水平的相关性研究

Relationship between body composition index and blood pressure among children aged 7-12

目的 探讨儿童体成分指数与血压水平的相关性.方法 对4326名7～12岁儿童进行身高、体重、血压和皮褶厚度测量,采用回归方程推算体脂比（BF%）,用公式计算脂肪组织指数（FMI）=BF%×体重/身高2和非脂肪组织指数（FFMI）=（体重-BF%×体重）/身高2.结果 FMI、FFMI与收缩压（SBP）和舒张压（DBP）呈一定程度正相关,7～12岁儿童FMI与SBP的相关系数为0.432～0.531（男生）、0.413～0.485（女生）,与DBP的相关系数为0.316～0450（男生）、0.345～0.421（女生）.FFMI与SBP的相关系数为0.214～0.366（男生）、0.108～0.383（女生）;与DBP的相关系数为0.090～0.250（男生）、0.063～0.214（女生）.血压与FMI的相关性高于FFMI.血压偏高儿童的体成分指数显著高于正常儿童,以FMI差距最大.结论 预防儿童高血压应从控制体脂肪、预防肥胖做起.

Objective To explore the relationship between body composition index and blood pressure of children, and to provide bases for early prevention against adult diseases. Methods A total of 4326 children aged 7-12 participated in this study, with height, weight, skinfold thickness （SFT）and blood pressure（BP）of all subjects measured. Body fat percentage（BF%）were calculated by regression equation, fat mass index（FMI）and fat-free mass index（FFMI）were calculated according to following expressions： FMI（kg/m2）=BF% × weight/height2 and FFMI（kg/m2）=（weight - BF% × weight）/height2. Results Systolic blood pressure（SBP）and diastolic blood pressure（DBP）were positively correlated with FMI and FFMI in both boys and girls. Correlation coefficients between SBP, DBP and FMI were 0.432-0.531, 0.316-0.450 for boys, and 0.413-0.485, 0.345-0.421 for girls respectively and the correlation coefficients between SBP, DBP and FFMI were 0.214-0.366, 0.090-0.250 for boys, and 0.108-0.383, 0.063-0.214 for girls respectively. The coefficient between BP and FMI were larger than those between BP and FFMI. The mean values of FMI and FFMI of children with high BP were significantly higher than those normal children, especially showed in FMI. Conclusion In order to prevent hypertension among children,priority should be comcentrated on controlling body fat and preventing obesity.