老年人躯干肌群与髋部肌群相关性研究

目的探讨老年人躯干肌群与髋部肌群体质成分含量的相关性。方法收集2017年3月至5月来我院体检的新街口社区60～85岁中老年人316名,其中,男性122名,女性194名。CT扫描得到志愿者腹部和髋部图像,使用东软医疗系统有限公司开发的高级可视化后处理工作站(advanced visualization workspace,AVW),分别定量测量L_3椎体中份层面和小转子下3 cm垂直股骨长径横截面的肌群面积(cross-sectional muscle area,CSMA)、肌肉间隙脂肪面积(inter-muscular adipose area,IMAA)、肌肉脂肪浸润程度(muscle fat infiltration,MFI)。用单样本K-S检验正态性;使用组内相关系数(interclass correlation coefficient,ICC)评价两名测量者组间重复性及一名测量者两次测量的组内重复性;使用独立样本t检验比较男、女两组间一般情况、躯干和髋部肌群CSMA、IMAA、MFI结果的差异;Pearson相关性比较两组L_3水平躯干肌群和髋部肌群体质成分的相关性,再分别以L_3 CSMA、IMAA、MFI为因变量,髋部CSMA、IMAA、MFI为自变量做多元逐步回归分析,确定影响躯干肌群体质成分的主要影响因子。P0.05,差异有统计学意义。结果男性躯干和髋部CSMA大于女性,两个部位MFI程度小于女性。Pearson相关分析显示男、女躯干CSMA、IMAA、MFI与髋部CSMA、IMAA、MFI成正相关,其中,男性躯干肌肉面积与髋部肌肉面积相关性最高。结论老年躯干肌群与髋部肌群体质成分改变具有相关性,男性躯干肌肉面积与髋部肌肉面积相关性最高。

Correlation between trunk muscle group and hip muscle group in older individuals

Objective: To investigate the correlation between the composition of trunk muscle group and hip muscle group. Methods: Data of 316 older individuals aged 60-85 years (122 males and 194 females), who underwent physical?examination from March to May 2017 at our hospital, were collected. Abdominal and hip images were obtained using CT scan. Cross-sectional muscle area (CSMA), intra-muscular muscle area (IMAA) and muscle fat infiltration (MFI) were obtained on the central plane of the third lumber vertebra (L3) and 3 cm below the lesser trochanter by using Post-processing workstation Advanced Visualization Workspace (AVW) developed by Shenyang Neusoft Ltd. Statistics analyses were performed by using one-sample K-S test to test the normality of the data, intra-class correlation coefficient (ICC) to test the inter-correlation of two subjects and the intra-correlation of two measures in one subject, independent-samples?t?test to test the differences between males and females in general characteristics and trunk and hip CSMA, IMAA and MFI, Pearson correlation analysis to test the correlation of the composition of muscle groups at L3 and hip, and multiple regression analysis to determine the predictors of trunk muscle group composition, with L3 CSMA, IMAA and MFI as the dependent variables and hip CSMA, IMAA and MFI as the independent variables. Results: CSMA of both trunk and hip in males was greater than that in females, and males had less MFI at both sites than females. Pearson correlation analysis showed positive correlation between L3 CSMA, IMAA and MFI and hip CSMA, IMAA and MFI in both males and females, and the correlation was the strongest for CSMA in males .Conclusion: In older people, trunk muscle composition positively correlated with hip muscle composition, of which, the correlation between trunk CSMA and hip CSMA in males was the highest.