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Table 2 Baseline predictors of RTW in original study group.

From: Subgroup analyses on return to work in sick-listed employees with low back pain in a randomised trial comparing brief and multidisciplinary intervention

  Association with RTW Interaction Interaction
   All participants Claimants excluded
  HRR (95% CI)* P-value** P-value**
Socio-demographics:    
Gender (men/women) 1.19 (0.93-1.52) 0.97 0.90
Age (<42/>42 years) 1.15 (0.90-1.97) 0.53 0.67
Marital status (married/single) 1.01 (0.75-1.36) 0.17 0.24
Children (no/yes) 1.25 (0.92-1.69) 0.23 0.21
Education (higher/lower) 1.05 (0.80-1.38) 0.35 0.56
Work-related factors:    
Public employee (yes/no) 1.06 (0.80-1.41) 0.92 0.72
High work pace (not often/often) 1.21 (0.94-1.54) 0.71 0.82
Colleagues willing to listen to work-related    
problems (often/not often) 1.33 (1.03-1.72) 0.27 0.63
Support from superior (not often/often) 1.04 (0.79-1.37) 0.41 0.77
Superiors willing to listen to work-related    
problems (often/not often) 1.14 (0.88-1.47) 0.48 0.63
Job satisfaction (very/not very satisfied) 1.18 (0.91-1.51) 0.020 0.026
Influence on work planning (yes/no) 1.40 (1.03-1.90) 0.16 0.14
Shift work (no/yes) 1.24 (0.91-1.68) 0.64 0.99
Interested in returning to current job (yes/no) 1.22 (0.83-1.81) 0.13 0.13
Health and work-related factors:    
Risk of losing job because of current    
sick leave (no/yes) 1.30 (1.00-1.69) 0.27 0.040
Concerned about losing job because of medical condition (no/yes) 1.19 (0.93-1.53) 0.33 0.14
LBP is caused by my work (no/yes) 1.05 (0.81-1.35) 0.28 0.39
Work ability, all in all (good/bad) 1.24 (0.96-1.60) 0.39 0.27
Permanently impaired work ability (no/yes) 1.67 (1.28-2.18) 0.048 0.27
Back at work in 6 months? (sure/not sure) 1.62 (1.24-2.11) 0.84 0.43
Work ability in a year (better/not better) 1.38 (1.05-1.82) 0.68 0.53
Incapacity benefit is desirable (no/yes) 2.04 (1.29-3.23) 0.55 0.33
  1. *adjusted for gender, age and intervention
  2. **adjusted for gender and age
  3. HRR (hazard rate ratio) is shown for each baseline variable without analysis of interaction in first column. In second column, P-values are shown for the interaction between baseline variable and intervention. P-values for the interaction between baseline variables and intervention are also shown after exclusion of 83 participants who have claimed compensation. All variables were dichotomised and analysed with Cox regression.