Hergenroeder Andrea L, Brach Jennifer S, Otto Amy D, Sparto Patrick J, Jakicic John M
Department of Physical Therapy, School of Health and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, PA.
Cardiopulm Phys Ther J. 2011 Sep;22(3):11-20.
Little is known about limitations in physical function across BMI categories in middle aged women using both self-report and performance-based measures. Furthermore, the impact of BMI on the measurement of function has not been explored. The purpose of this study was to assess physical function in adult women across BMI categories using self-report and performance-based measures and determine the influence of BMI on the relationship between the measures.
Fifty sedentary females (10 in each BMI category: normal weight, overweight, obese class I, II, and III) aged 51.2 ± 5.4 years participated. Assessments included demographics, past medical history, physical activity level, BMI, and self-report (Late Life Function and Disability Instrument) and performance-based measures of physical function (6-Minute Walk Test, timed chair rise, gait speed). Physical function was compared between BMI categories using analysis of variance. The influence of BMI on the relationship of self-report and performance-based measures was analyzed using linear regression.
Compared to those that were normal weight or overweight, individuals with obesity scored lower on the self-report measure of physical function (LLFDI) for capability in participating in life tasks and ability to perform discrete functional activities. On the performance-based measures, the individuals with obesity had slower gait speed compared to the normal and overweight weight groups. For the 6-Minute Walk Test and timed chair stands, individuals with obesity had poorer performance compared to those who were normal weight. Linear regression analyses revealed that BMI attenuated the relationship between the self-report and performance-based measures by approximately 50%.
While those with severe obesity were most impaired, adult women with less severe obesity also demonstrated significant decrements in physical function.
对于使用自我报告和基于表现的测量方法来评估中年女性不同BMI类别之间的身体功能限制，我们了解得还很少。此外，BMI对功能测量的影响尚未得到探讨。本研究的目的是使用自我报告和基于表现的测量方法评估不同BMI类别的成年女性的身体功能，并确定BMI对这些测量方法之间关系的影响。
50名久坐不动的女性（每个BMI类别10名：正常体重、超重、肥胖I级、II级和III级）参与了研究，年龄为51.2±5.4岁。评估内容包括人口统计学信息、既往病史、身体活动水平、BMI、自我报告（晚年功能与残疾量表）以及基于表现的身体功能测量方法（6分钟步行测试、定时起坐、步态速度）。使用方差分析比较不同BMI类别之间的身体功能。使用线性回归分析BMI对自我报告和基于表现的测量方法之间关系的影响。
与正常体重或超重的个体相比，肥胖个体在参与生活任务的能力和执行离散功能活动的能力的自我报告身体功能测量（LLFDI）上得分较低。在基于表现的测量中，肥胖个体的步态速度比正常体重和超重组慢。对于6分钟步行测试和定时起坐，肥胖个体的表现比正常体重个体差。线性回归分析显示，BMI使自我报告和基于表现的测量方法之间的关系减弱了约50%。
虽然重度肥胖者受损最严重，但肥胖程度较轻的成年女性也表现出身体功能的显著下降。
