title: The 11-item workplace organizational policies and practices questionnaire (OPP-11): examination of its construct validity, factor structure, and predictive validity in injured workers with upper-limb disorders.
abstract: BACKGROUND
  Reliable and valid measurement of workplace organizational policies and practices (OPPs) is needed to evaluate their influences on the prevention and management of occupational injuries.
  
  
  METHODS
  Injured workers (n = 614) attending an upper-limb specialty clinic operated by the Workplace Safety & Insurance Board of Ontario were recruited for a 1-year study. The OPP-11, completed at baseline, was examined for scaling properties (floor/ceiling effects, internal consistency, and item-convergent/discriminant validity), construct validity, and factor structure. Predictive validity for longitudinal work disability was examined using multivariable logistic regressions.
  
  
  RESULTS
  Strong scaling properties were observed for the OPP-11. High internal consistency (Cronbach's alpha = 0.80-0.90) and expected associations with comparator constructs were evident. A 4-domain structure (fit statistics: CFI = 0.98, TLI = 0.97, and RMSEA = 0.06) was supported. Higher OPP-11 predicted more favorable 12-month work disability outcomes, after adjusting for demographic and health attributes.
  
  
  CONCLUSIONS
  The OPP-11 is valid for use in upper-limb disorders. Expanding the ergonomic practices domain could be considered.
authors: Department of Health Policy, Management and Evaluation, University of Toronto, Ontario, Canada.
authors: Kenneth
authors: K
authors: Tang
authors: Joy C
authors: JC
authors: MacDermid
authors: Benjamin C
authors: BC
authors: Amick
authors: Dorcas E
authors: DE
authors: Beaton
mesh_terms: D000328:Adult; D016009:Chi-Square Distribution; D004185:Disability Evaluation; D005240:Feasibility Studies; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D009784:Occupational Diseases / Q000453:epidemiology* / Q000209:etiology; D016273:Occupational Exposure / Q000009:adverse effects*; D016272:Occupational Health; D016134:Organizational Policy; D011237:Predictive Value of Tests; D011594:Psychometrics; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D014481:United States / Q000453:epidemiology; D034941:Upper Extremity / Q000293:injuries*