National Advisory Unit on Rehabilitation in Rheumatology, The Division of Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway.
Faculty of Medicine, Institute of Health and Society, University of Oslo, Oslo, Norway.
BMC Musculoskelet Disord. 2021 Feb 27;22(1):232. doi: 10.1186/s12891-021-04069-z.
To tailor physical activity treatment programs for patients with osteoarthritis, clinicians need valid and feasible measurement tools to evaluate habitual physical activity. The widely used International Physical Activity Questionnaire-Short Form (IPAQ-SF) is not previously validated in patients with osteoarthritis.
To assess the concurrent criterion validity of the IPAQ-SF in patients with osteoarthritis, using an accelerometer as a criterion-method.
Patients with osteoarthritis (n = 115) were recruited at The Division of Rheumatology and Research at Diakonhjemmet Hospital (Oslo, Norway). Physical activity was measured by patients wearing an accelerometer (ActiGraph wGT3X-BT) for seven consecutive days, followed by reporting their physical activity for the past 7 days using the IPAQ-SF. Comparison of proportions that fulfilled physical activity recommendations as measured by the two methods were tested by Pearson Chi-Square analysis. Differences in physical activity levels between the IPAQ-SF and the accelerometer were analyzed with Wilcoxon Signed-Rank Test and Spearman rank correlation test. Bland-Altman plots were used to visualize the concurrent criterion validity for total- and intensity-specific physical activity levels.
In total, 93 patients provided complete physical activity data, mean (SD) age was 65 (8.7) years, 87% were women. According to the IPAQ-SF, 57% of the patients fulfilled the minimum physical activity recommendations compared to 31% according to the accelerometer (p = 0.043). When comparing the IPAQ-SF to the accelerometer we found significant under-reporting of total physical activity MET-minutes (p = < 0.001), sitting (p = < 0.001) and walking (p < 0.001), and significant over-reporting of moderate-to-vigorous physical activity (p < 0.001). For the different physical activity levels, correlations between the IPAQ-SF and the accelerometer ranged from rho 0.106 to 0.462. The Bland-Altman plots indicated an increased divergence between the two methods with increasing time spent on moderate-to-vigorous intensity physical activity.
Physical activity is a core treatment of osteoarthritis. Our finding that patients tend to over-report activity of higher intensity and under-report low-intensity activity and sitting-time is of clinical importance. We conclude that the concurrent criterion validity of the IPAQ-SF was weak in patients with osteoarthritis.
为了为骨关节炎患者量身定制体育活动治疗方案，临床医生需要有效的、可行的测量工具来评估习惯性体育活动。广泛使用的国际体力活动问卷-短表（IPAQ-SF）以前没有在骨关节炎患者中进行验证。
使用加速度计作为标准方法，评估 IPAQ-SF 在骨关节炎患者中的同时效标效度。
在挪威奥斯陆 Diakonhjemmet 医院的风湿病学和研究科（Division of Rheumatology and Research at Diakonhjemmet Hospital）招募了 115 名骨关节炎患者。患者佩戴加速度计（ActiGraph wGT3X-BT）连续 7 天，然后使用 IPAQ-SF 报告过去 7 天的身体活动情况。通过 Pearson Chi-Square 分析测试两种方法测量的满足身体活动建议的比例是否存在差异。采用 Wilcoxon 符号秩检验和 Spearman 秩相关检验分析 IPAQ-SF 和加速度计之间的体力活动水平差异。Bland-Altman 图用于直观显示总体力活动和强度特异性体力活动水平的同时效标效度。
共有 93 名患者提供了完整的体力活动数据，平均（SD）年龄为 65（8.7）岁，87%为女性。根据 IPAQ-SF，57%的患者满足最低体力活动建议，而根据加速度计则为 31%（p=0.043）。与加速度计相比，我们发现 IPAQ-SF 显著低估了总体力活动代谢分钟数（p<0.001）、久坐时间（p<0.001）和步行时间（p<0.001），并显著高估了中高强度体力活动（p<0.001）。对于不同的体力活动水平，IPAQ-SF 与加速度计之间的相关性范围为 rho 0.106 至 0.462。Bland-Altman 图表明，随着中高强度体力活动时间的增加，两种方法之间的差异逐渐增大。
体力活动是骨关节炎的核心治疗方法。我们发现患者倾向于高估高强度活动和低估低强度活动和久坐时间，这具有临床意义。我们得出结论，在骨关节炎患者中，IPAQ-SF 的同时效标效度较弱。
