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Table 3 Adjusted mean KOSS-SF subgroup score at 1st, 2nd, 3rd survey

From: Changes of depression and job stress in workers after merger without downsizing

Variables 1st
Mean(95% C.I)
2nd
Mean(95% C.I)
3rd
Mean(95% C.I)
F P * Post hoc
Job demand 42.29(38.04–46.54) 40.31(36.82–43.79) 46.23(42.22–50.23) 0.423 0.646 A > B, B < C, A < C
Insufficient job control 55.58(51.59–59.57) 55.47(51.55–59.38) 56.61(53.11–60.11) 0.863 0.423 A > B, B < C, A < C
Interpersonal conflict 41.11(37.01–45.22) 37.33(33.34–41.32) 39.01(34.96–43.06) 0.199 0.808 A > B, B < C. A > C
Organizational system 51.41(47.54–55.27) 57.25(53.48–61.01) 58.27(54.44–62.10) 2.779 0.063 A < B, B < C, A < C
Lack of reward 50.50(46.26–54.74) 55.96(51.85–60.07) 60.43(56.29–64.57) 3.296 0.038 A < B, B < C, A < C
Occupational climate 40.63(36.74–44.52) 40.82(36.90–44.74) 44.34(40.14–48.55) 0.888 0.412 A < B, B < C, A < C
Job insecurity 37.71 ± 24.91 78.31 ± 25.26 60.29 ± 27.82 8.025 P < 0.001 A < B, B > C, A < C
  1. A 1st survey April 2014, B 2nd survey April 2015, C 3rd survey April 2016, C. I Confidence interval
  2. * P value was calculated by repeated measure ANOVA
  3. By Bonferroni correction, p < 0.05