甘肃东乡族成人身体脂肪含量及分布随年龄变化特点

Changing characteristics with age of body fat mass and distribution of Dongxiang nationality adults in Gansu

目的利用生物电阻抗法,分析甘肃东乡族成人脂肪含量及分布随年龄变化特点。方法采用横断面整群分层随机抽样方法,选取491例甘肃省东乡族自治县东乡族成人为研究对象,应用体成分分析仪测量脂肪组织相关体成分指标。结果在总体人群及各个年龄组,甘肃东乡族成年女性的总脂肪量、皮下脂肪含量、躯干及四肢脂肪量均高于男性(P<0.01);内脏脂肪含量差异无显著性(P>0.05)。随着年龄的增长,男、女性内脏脂肪含量均呈上升趋势。男、女性皮下脂肪含量、躯干脂肪量总体呈上升趋势,20岁年龄组到40岁年龄组上升最快,在50岁年龄组稍有下降,此后呈缓慢上升趋势。女性左上肢脂肪量呈持续上升状态,20岁年龄组到40岁年龄组上升较快,此后上升速度放缓;男性总体呈上升趋势,20岁年龄组到40岁年龄组上升较快,在50岁年龄组稍有下降,此后呈缓慢上升趋势。男、女性右上肢脂肪量、双下肢脂肪量均在40岁年龄组达峰值后呈下降趋势。结论甘肃东乡族成年女性除内脏脂肪外,其余身体各部位的脂肪含量均高于男性。随着年龄的增长,甘肃东乡族成人的脂肪含量均发生变化,不同性别、不同部位的脂肪变化趋势略有不同,但内脏脂肪含量和女性左上肢脂肪量一直呈上升趋势,50岁年龄组是各部位脂肪含量发生趋势改变的时间点。

Objective To analyze the changing characteristics with age of body fat mass and distribution of Dongxiang nationality adults in Gansu by bioelectrical impedance analysis method. Methods A total of 491 Dongxiang adults in Dongxiang autonomous county of Gansu Province were selected by cross-sectional stratified random sampling method. The body composition of fat was measured by body composition analyzer. Results In the general population and different age groups,the total fat mass,subcutaneous fat mass,trunk and limbs fat mass in the female adults of Dongxiang in Gansu were higher than in the male（ P〈 0. 01）,and there was no significant difference in the visceral fat mass between the male and female（ P〉 0. 05）. With age,visceral fat mass increased constantly in both male and female. Subcutaneous and trunk fat mass in male and female showed a rising trend of increasing quickly from 20 age group to 40 age group,decreasing slightly in 50 age group and subsequently rising slowly. Left upper limbs fat mass in the female increased constantly,increased quickly from 20 age group to 40 age group and subsequently rising slowly. Left upper limbs fat mass in the male showed a rising trend of increasing quickly from 20 age group to 40 age group,decreasing slightly in 50 age group and subsequently rising slowly. Double lower limbs and right upper limbs fat mass decreased after the peak of 40 age group. Conclusion Fat mass in Dongxiang nationality female adults is higher than in male except visceral fat mass. Fat mass of Dongxiang adults in Gansu changed with age,and it is somewhat different in different genders and parts. Visceral fat mass in both genders and left upper limbs fat mass in the female increase constantly. The 50 age group is the time point when the trend of fat in each part changes.