Background

Determining the level of physical activity (PA) is an essential part of patient evaluation in axial spondylarthritis (axSpA). Subjective and objective methods are both frequently used methods for evaluating PA. Although subjective methods are cost-effective and easy to use, their accuracy for measuring PA is still questionable.

Objective

To investigate the concurrent criterion validity of a self-reported questionnaire (IPAQ-Short Form) when compared to an accelerometer (Actigraph wGT3X-BT) for measuring PA level in patients with axSpA.

Design

Cross-sectional design.

Methods

Fifty-eight patients with axSpA with a median age of 39.0 (IQR 25/75: 30.0/46.0) years were included in the study. An accelerometer (Actigraph wGT3X-BT) was attached to the waist of patients at their first visits and was removed at their second visits, seven days later. Patients were asked to complete the International Physical Activity Questionnaire Short Form (IPAQ) at their second visits.

Results

No significant correlations were determined between IPAQ and accelerometer (p > 0.05), except for the moderate PA (rho: 0.367, p < 0.05), and total PA (rho: 0.330, p < 0.05). It was also observed that IPAQ was underestimating energy expenditure for all types of PA.

Conclusion

IPAQ might not be a valid tool for measuring PA level in patients with axSpA. Disease-specific subjective methods for determining the PA should be developed and validated for those patients.

中文翻译：

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国际体力活动问卷 (IPAQ) 是否是衡量中轴性脊柱炎患者体力活动的有效评估工具？

背景

确定体力活动 (PA) 水平是轴性脊柱炎 (axSpA) 患者评估的重要组成部分。主观方法和客观方法都是评估 PA 的常用方法。尽管主观方法具有成本效益且易于使用，但它们测量 PA 的准确性仍然值得怀疑。

客观的

研究与加速度计 (Actigraph wGT3X-BT) 相比，用于测量 axSpA 患者的 PA 水平的自我报告问卷（IPAQ-Short Form）的并发标准有效性。

设计

横断面设计。

方法

该研究包括了 58 名中位年龄为 39.0 (IQR 25/75: 30.0/46.0) 岁的 axSpA 患者。加速度计（Actigraph wGT3X-BT）在第一次就诊时贴在患者的腰部，7天后在第二次就诊时被移除。患者被要求在第二次就诊时完成国际体育活动问卷简表 (IPAQ)。

结果

除了中度 PA（rho：0.367，p < 0.05）和总 PA（rho：0.330，p < 0.05）外，IPAQ 和加速度计之间没有显着相关性（p > 0.05）。还观察到 IPAQ 低估了所有类型 PA 的能量消耗。

结论

IPAQ 可能不是测量 axSpA 患者 PA 水平的有效工具。应该为这些患者开发和验证用于确定 PA 的特定疾病的主观方法。