title: Psychometric properties of a German organizational justice questionnaire (G-OJQ) and its association with self-rated health: findings from the Mannheim Industrial Cohort Studies (MICS).
abstract: OBJECTIVE
  The objective of the present study was to validate a German 11-item organizational justice questionnaire (G-OJQ) that consists of two subscales, referred to as "procedural justice" (PJ) and "interactional justice" (IJ) adapted from Moorman's organizational justice (OJ) questionnaire. A second objective was to determine associations of the G-OJQ with self-rated health.
  
  
  METHODS
  This study used cross-sectional data from an occupational cohort of 1518 factory workers from Germany (87.7 % male; mean age = 38.8 with SD = 11.9). After splitting the sample in two random subsamples, we assessed structural validity by exploratory factor analyses in one subsample and by confirmatory factor analysis in the other subsample. Internal validity was assessed by Cronbach's α. Associations with self-reported poor health were estimated by logistic regression.
  
  
  RESULTS
  The full scale and its subscales yielded Cronbach's α's of ≥0.9, and item-total correlations were ≥0.5. Factor analyses confirmed the expected 2-factor structure, labeled "interactional justice" (IJ, 4 items, λ 0.43-0.94) and "procedural justice" (PJ, 7 items, λ 0.46-0.83), respectively, and showed an acceptable fit to the data (χ (2) = 61; p = .001; CFI = 0.995; RMSEA = 0.037). The OJ total score as well as subscale scores in the lowest quartile, when compared to the highest quartile, was associated with an ≥2.3 increased odds of reporting poor health.
  
  
  CONCLUSIONS
  The G-OJQ seems to be a valid and useful tool for observational and intervention studies in occupational settings. Future studies may additionally explore longitudinal associations and test the generalizability of the present findings to other populations and health outcomes.
authors.affiliation: Mannheim Institute of Public Health, Social and Preventive Medicine, Medical Faculty Mannheim, Heidelberg University, Ludolf-Krehl-Strasse 7-11, 68167, Mannheim, Germany, raphael.herr@medma.uni-heidelberg.de.
authors.forename: Raphael M
authors.initials: RM
authors.lastname: Herr
authors.forename: Jian
authors.initials: J
authors.lastname: Li
authors.forename: Jos A
authors.initials: JA
authors.lastname: Bosch
authors.forename: Burkhard
authors.initials: B
authors.lastname: Schmidt
authors.forename: David M
authors.initials: DM
authors.lastname: DeJoy
authors.forename: Joachim E
authors.initials: JE
authors.lastname: Fischer
authors.forename: Adrian
authors.initials: A
authors.lastname: Loerbroks
mesh_terms: D000328:Adult; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D005163:Factor Analysis, Statistical; D005260:Female; D005858:Germany; D006801:Humans; D007221:Industry / Q000706:statistics & numerical data; D016015:Logistic Models; D008297:Male; D016272:Occupational Health / Q000706:statistics & numerical data; D011594:Psychometrics; D015203:Reproducibility of Results; D057566:Self Report; D012935:Social Justice / Q000706:statistics & numerical data; D011795:Surveys and Questionnaires