Faculty of Health Sciences, Oslo Metropolitan University, Oslo, Norway.
Research and Communication Unit for Musculoskeletal Health (FORMI), Division of Clinical Neuroscience, Oslo University Hospital, Oslo, Norway.
BMC Musculoskelet Disord. 2022 Mar 24;23(1):282. doi: 10.1186/s12891-022-05222-y.
Demands of physical work are related to musculoskeletal disorders, and hence, important to assess. The Physical Workload Questionnaire (PWQ) is based on 26 items related to physical workload. The PWQ has been translated into Norwegian, but its psychometric properties have not yet been tested. The aim of this study was to assess the validity and reliability of the PWQ among patients with musculoskeletal disorders.
A cross-sectional study with a test-retest design was conducted to assess construct validity (structural validity and hypothesis testing) and reliability (internal consistency and test-retest reliability) among employed patients with musculoskeletal disorders. Exploratory factor analysis was performed to assess the structural validity and number of items to be included in the Norwegian version of the PWQ. Hypothesis testing was assessed by 14 a priori hypotheses ("known" group, convergent and discriminant validity). Internal consistency was evaluated using Cronbach's alpha and test-retest reliability by Intraclass Correlation Coefficient (ICC), Standard Error of Measurement (SEM) and Smallest Detectable Change (SDCind).
In total, 115 patients with a mean age (SD) of 46 (9) years were included, of which 48 were included in the reliability analyses. Exploratory factor analysis resulted in two subscales: "Heavy physical work" (15 items, range 0-100) and "Long-lasting postures and repetitive movements" (7 items, range 0-100). No floor or ceiling effects were seen in the subscales. Twelve of the 14 (85%) predefined hypotheses were confirmed. The internal consistency with Cronbach's alpha was 0.94 and 0.85 on subscales 1 and 2, respectively. Test-retest reliability analyses demonstrated an ICC of 0.96 (95% CI 0.88, 0.98) and 0.92 (95% CI 0.81, 0.96), SEM of 6.9 and 10.0 and SDCind of 19.2 and 27.7 of subscales 1 and 2, respectively.
The Norwegian version of the PWQ demonstrated good validity and reliability and can be used to evaluate physical workload in patients with musculoskeletal disorders.
体力工作的要求与肌肉骨骼疾病有关，因此需要进行评估。体力工作问卷（PWQ）基于 26 项与体力工作负荷相关的项目。PWQ 已被翻译成挪威语，但尚未对其心理测量学特性进行测试。本研究的目的是评估肌肉骨骼疾病患者中 PWQ 的有效性和可靠性。
采用横断面研究和测试-重测设计，评估具有肌肉骨骼疾病的在职患者的结构效度（结构效度和假设检验）和可靠性（内部一致性和测试-重测可靠性）。采用探索性因子分析评估挪威语 PWQ 中包含的项目数量和结构效度。通过 14 个先验假设（“已知”组、收敛和判别有效性）评估假设检验。采用 Cronbach's alpha 评估内部一致性，采用组内相关系数（ICC）、测量标准误差（SEM）和最小可检测变化（SDCind）评估测试-重测可靠性。
共纳入 115 名平均年龄（标准差）为 46（9）岁的患者，其中 48 名患者纳入可靠性分析。探索性因子分析产生了两个子量表：“重体力工作”（15 项，范围 0-100）和“持久姿势和重复运动”（7 项，范围 0-100）。两个子量表均未出现地板或天花板效应。14 个先验假设中的 12 个（85%）得到了证实。Cronbach's alpha 内部一致性分别为 0.94 和 0.85。测试-重测可靠性分析表明，子量表 1 和 2 的 ICC 分别为 0.96（95%CI 0.88，0.98）和 0.92（95%CI 0.81，0.96），SEM 分别为 6.9 和 10.0，SDCind 分别为 19.2 和 27.7。
挪威语 PWQ 具有良好的有效性和可靠性，可用于评估肌肉骨骼疾病患者的体力工作负荷。
