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Table 1 Demographics: age, gender and percentage of working hours at work at baseline, per group

From: Evaluation of a randomized controlled trial on the effect on return to work with coaching combined with light therapy and pulsed electromagnetic field therapy for workers with work-related chronic stress

   Mean(sd) Percentage (%) Median (IQR) p-value of between-groups test*
Age (years) Intervention (n = 28) 43 (8.0)    0.01
Placebo (n = 28) 47 (9.7)    
Control (n = 28) 40 (8.9)    
Gender (% women) Intervention (n = 28)   72   0.87
Placebo (n = 28)   69   
Control (n = 28)   66   
Work-hours RTW at baseline (% of contract hours) Intervention (n = 28) 7.3 (16.70)   0.0 (1.25) 0.17
Placebo (n = 28) 13.2 (20.44)   0.0 (24.31)  
Control (n = 28) 6.9 (17.80)   0.0 (0.00)  
  1. *Independent sample T-test for age, Chi-square test for gender and Kruskal-Wallis for Work-hours RTW
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