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Table 6 Results of logistic regression models of factors predicting higher work ability regarding mental demands

From: Work-life balance predicted work ability two years later: a cohort study of employees in the Swedish energy and water sector

   Crude
OR 95% CI
Model 1
OR 95% CI
Model 2
OR 95% CI
Model 3
OR 95% CI
Model 4
OR 95% CI
Work-life balance WIPLa 2.05** (1.46 to 2.88) 1.76** (1.23 to 2.51) 1.78** (1.22 to 2.59) 1.92** (1.29 to 2.87) 1.59* (1.03 to 2.44)
PLIWa 3.35** (1.78 to 6.34) 2.44** (1.27 to 4.68) 2.60** (1.33 to 5.11) 3.38** (1.64 to 6.96) 2.88** (1.31 to 6.32)
Employment Company      
Company 1 1   1 1 1
Company 2 2.36* (1.12 to 4.90)   2.20 (0.84 to 5.74) 2.47 (0.91 to 6.71) 2.38 (0.83 to 6.83)
Company 3 1.38 (0.64 to 2.97)   1.30 (0.49 to 3.48) 1.46 (0.54 to 3.99) 1.27 (0.44 to 3.68)
Position at work      
Production 1   1 1 1
Administration 0.80 (0.44 to 1.47)   0.95 (0.48 to 1.87) 0.71 (0.32 to 1.56) 0.66 (0.28 to 1.56)
Manager 0.83 (0.38 to 1.83)   1.02 (0.41 to 2.50) 0.71 (0.270 to 1.87) 0.80 (0.29 to 2.23)
Experience of leadership qualityb 1.46* (1.05 to 2.04)   1.58* (1.10 to 2.28) 1.65** (1.13 to 2.40) 1.49* (1.003 to 2.21)
Demographic Gender      
Male 1    1 1
Female 0.86 (0.53 to 1.42)    0.72 (0.33 to 1.55) 0.68 (0.29 to 1.58)
Age 1.00 (0.97 to 1.03)    0.99 (0.96 to 1.02) 1.00 (0.96 to 1.03)
Education level      
University 1    1 1
Secondary school or equal 0.83 (0.45 to 1.54)    1.11 (0.44 to 2.77) 1.28 (0.46 to 3.53)
Compulsory school 1.51 (0.78 to 2.95)    3.39* (1.06 to 10.82) 3.85* (1.07 to 13.86)
Baseline work ability regarding mental demands Lower at T0 1     1
Higher at T0 6.92** (3.74 to 12.78)     5.55** (2.75 to 11.20)
Nagelkerke R Square (R2)   16% 21% 26% 38%
ΔR2    5% 5% 12%
  1. Odds ratio (OR), 95% CI: 95% confidence interval of factors predicting higher work ability regarding mental demands. Work ability regarding mental demands was dichotomized into lower work ability (=0) and higher
  2. work ability (=1) *P ≤ 0.05, **P ≤ 0.01 aWork interference with personal life (WIPL) and personal life interference with work (PLIW), was both three item index scales, ranging from 1 to 5. bExperience with leadership quality was measured with an index, ranging from 1 to 6. Model 1 = PLIW+WIPL, Model 2 = Model 1 + company+position at work+experience of leadership quality, Model 3 = Model 2 + gender+age + education level, Model 4 = Model 3 + baseline work ability regarding mental demands