Norwegian Research Center for Active Rehabilitation, Department of Orthopedics, Oslo University Hospital, Norway.
BMC Musculoskelet Disord. 2012 Feb 21;13:26. doi: 10.1186/1471-2474-13-26.
Physical activity (PA) is beneficial in reducing pain and improving function in lower limb osteoarthritis (OA), and is recommended as a first line treatment. Self-administered questionnaires are used to assess PA, but knowledge about reliability and validity of these PA questionnaires are limited, in particular for patients with OA. The purpose of this study was to evaluate the reliability and validity of the Physical Activity Scale for the Elderly (PASE) in patients with hip OA.
Forty patients with hip OA (20 men and 20 women, mean age 61.3 ± 10 years) were included. For test-retest reliability PASE was administered twice with a mean time between tests of 9 ± 4 days. Intraclass correlation coefficient (ICC), standard error of measurement (SEM) and minimal detectable change (MDC) were calculated for the total score and for the particular items assessing different PA intensity levels. In addition a Bland-Altman analysis for the total PASE score was performed. Construct validity was evaluated by comparing the PASE results with the Actigraph GT1M accelerometer and the International Physical Activity Questionnaire (IPAQ), using the Spearman rank correlation coefficient.
ICC for the total PASE score was 0.78, with relatively large error of measurement; SEM = 31 and MDC = 87. ICC for the intensity items was 0.20 for moderate PA intensity, 0.46 for light PA intensity and to 0.68 for vigorous PA intensity. The Spearman rank correlation coefficient between the Actigraph GT1M total counts per minute and the total PASE score was 0.30 (p = 0.089), and ranging from 0.20-0.38 for the different PA intensity categories. The Spearman rank correlation between IPAQ and PASE was 0.61 (p = 0.001) for the total scores.
In patients with hip OA the test-retest reliability of the total PASE score was moderate, with acceptable ICC, but with large measurement errors. The construct validity of the PASE was poor when compared to the Actigraph GT1M accelerometer. Test-retest reliability and construct validity revealed that the PASE was unable to assess PA intensity levels. PASE is not recommended as a valid tool to examine PA level for patients with hip OA.
身体活动（PA）有益于减轻下肢骨关节炎（OA）患者的疼痛和改善功能，被推荐为一线治疗方法。自我管理问卷用于评估 PA，但这些 PA 问卷的可靠性和有效性知识有限，尤其是对于 OA 患者。本研究旨在评估老年人身体活动量表（PASE）在髋 OA 患者中的可靠性和有效性。
共纳入 40 例髋 OA 患者（男 20 例，女 20 例，平均年龄 61.3±10 岁）。为了评估测试-重测信度，两次测试之间的平均时间间隔为 9±4 天。计算总分和评估不同 PA 强度水平的特定项目的组内相关系数（ICC）、测量误差（SEM）和最小可检测变化（MDC）。此外，还对总 PASE 评分进行了 Bland-Altman 分析。通过与 Actigraph GT1M 加速度计和国际体力活动问卷（IPAQ）比较，使用 Spearman 秩相关系数评估结构效度。
PASE 总分的 ICC 为 0.78，测量误差较大；SEM=31，MDC=87。PA 强度项目的 ICC 为中强度 PA 为 0.20，轻强度 PA 为 0.46，高强度 PA 为 0.68。Actigraph GT1M 每分钟总计数与 PASE 总分之间的 Spearman 秩相关系数为 0.30（p=0.089），不同 PA 强度类别的范围为 0.20-0.38。IPAQ 与 PASE 总分的 Spearman 秩相关系数为 0.61（p=0.001）。
髋 OA 患者的 PASE 总分测试-重测信度为中度，ICC 可接受，但测量误差较大。与 Actigraph GT1M 加速度计相比，PASE 的结构效度较差。测试-重测信度和结构效度表明，PASE 无法评估 PA 强度水平。不建议将 PASE 作为评估髋 OA 患者 PA 水平的有效工具。
