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Table 5 Results of logistic regression models of factors predicting higher work ability regarding physical 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 1.49** (1.10 to 2.00) 1.41* (1.03 to 1.93) 1.62** (1.15 to 2.30) 1.84** (1.27 to 2.69) 1.60* (1.07 to 2.40)
PLIWa 1.61 (0.98 to 2.65) 1.33 (0.78 to 2.26) 1.39 (0.79 to 2.45) 1.60 (0.86 to 2.98) 1.41 (0.72 to 2.76)
Employment Company      
Company 1 1   1 1 1
Company 2 1.81 (0.99 to 3.30)   1.54 (0.64 to 3.72) 1.81 (0.72 to 4.57) 1.52 (0.55 to 4.17)
Company 3 2.61* (1.15 to 5.92)   1.70 (0.69 to 4.20) 2.00 (0.78 to 5.12) 1.42 (0.51 to 3.98)
Position at work      
Production 1   1 1 1
Administration 0.77 (0.40 to 1.47)   2.28* (1.17 to 4.46) 1.61 (0.77 to 3.39) 1.55 (0.69 to 3.49)
Manager 1.15 (0.48 to 2.79)   3.31** (1.33 to 8.26) 2.49 (0.94 to 6.59) 1.91 (0.67 to 5.40)
Experience of leadership qualityb 1.68** (1.21 to 2.33)   1.59** (1.12 to 2.27) 1.62** (1.13 to 2.33) 1.51* (1.02 to 2.22)
Demographic Gender      
Male 1    1 1
Female 1.53 (0.92 to 2.56)    1.36 (0.64 to 2.89) 1.95 (0.85 to 4.49)
Age 0.99 (0.96 to 1.01)    0.98 (0.95 to 1.02) 0.99 (0.95 to 1.02)
Education level      
University 1    1 1
Secondary school or equal 1.40 (0.76 to 2.58)    0.98 (0.42 to 2.30) 0.96 (0.38 to 2.44)
Compulsory school 3.49** (1.72 to 7.08)    2.75 (0.92 to 8.25) 2.06 (0.63 to 6.76)
Baseline work ability regarding physical demands Lower at T0 1     1
Higher at T0 6.70** (3.70 to 12.14)     5.43** (2.78 to 10.62)
Nagelkerke R Square (R2)   5% 17% 22% 35%
ΔR2    12% 5% 13%
  1. Odds ratio (OR), 95% CI: 95% confidence interval of factors predicting higher work ability regarding physical demands. Work ability regarding physical demands was dichotomized into lower work ability (=0) and higher 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 = WIPL+PLIW, 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 physical demands