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Table 1 Baseline sample characteristics

From: Effort-reward imbalance and work ability: cross-sectional and longitudinal findings from the Second German Sociomedical Panel of Employees

  Mean (SD) or % Median IQR Cronbach’s Alpha
WAI, mean (SD) 38.1 (7.4) 39.5 34.0; 43.5 0.84
WAI     
 Good or excellent, % 65.2    
 Poor or moderate, % 34.8    
Gender: female, % 33.8    
Age, mean (SD) 51.1 (4.2) 51.0 47.0; 55.0  
Low educational level, % 34.8    
White-collar worker, % 97.4    
Exercise: at least two hours per week, % 46.6    
BMI ≥ 25, % 58.5    
Smoking, % 21.4    
Health-related behaviour (0–3), mean (SD) 1.7 (0.9) 2.0 1.0; 2.0  
Physical demands (0–12), mean (SD) 1.3 (2.0) 1.0 0.0; 2.0 0.68
Psychological job demands (0–4), mean (SD) 1.5 (0.9) 1.4 0.8; 2.2 0.82
Job control (0–4), mean (SD) 3.2 (0.7) 3.3 2.8; 3.8 0.79
Effort (5–25), mean (SD) 14.9 (4.5) 15.0 12.0; 18.0 0.84
Reward (11–55), mean (SD) 43.8 (8.7) 45.0 37.0; 52.0 0.89
ER ratio, mean (SD) 0.8 (0.4) 0.7 0.5; 1.0  
ERI: ER ratio > 1, % 25.9    
  1. n = 1501; SD, standard deviation; IQR, interquartile range; WAI, Work Ability Index; BMI, body mass index; ER ratio, effort-reward ratio; ERI, effort-reward imbalance