| MEASUREMENT PROPERTIES | |
| Limitations | <5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
Long Version: varied in scales from 0.61-0.91 WSF: 0.89 |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
Three weeks interval: Long Version: r=0.68-0.89 WSF: 0.88; p<0.01 |
| C. Reliability interobserver or Measurement error | Not Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
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| 2. VALIDITY | |
| A. Content validity: face validity | Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
Selection of 2 items from past research; item generation through focus groups with occupational physicians, physical therapists, occupational health psychologists, and experts in ergonomics, behavioral science, and human factors; Pilot testing of preliminary measure Administration of pool of items to new larger sample of office workers SF: eliminated half of items randomly |
| B. Construct Validity: Structural validity |
Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Not Tested |
| Brief Description |
Long version: Two separate factor analyses (varimax rotation) were computed: one for the categorical response items resulting in 6 factors (Working through pain, Social reactivity, Limited workplace support, Deadlines/Pressure, Self-imposed workplace/workload, Breaks ) accounting for 47.8% of the total variance and one for the dichotomous items resulting in 4 factors (Mood, Pain/Tension, Autonomic Response, Numbness/Tingling) accounting for 30.7% of the total variance Short version: A factor analysis was conducted to develop a brief 10-item scale for potential use in the clinical setting and the 3 pain related questions were removed; this 7-item scale highly correlated with the 79-item scale (r=0.923, P<0 .001) and the 32-item scale (r = 0.932, P <0 .001) (Harrington et el, J Occup Environ Med, 2010) |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
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