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Table 2 Baseline characteristics of non-permanent workers, sick-listed due to psychological problems (n = 320)

From: Is the “Brainwork Intervention” effective in reducing sick leave for non-permanent workers with psychological problems? Results of a controlled clinical trial

  Intervention group
(n = 164)
Control group
(n = 156)
Age, yr (Mean ± SD) 40 ± 10.7 40 ± 10.8
Gender n (%) male 76 (46%) 71 (46%)
Type of worker n (%)
Unemployed/temporary agency worker 115 (70%) 112 (72%)
Expired fixed-term contract worker 49 (30%) 44 (28%)
Brainwork categorya n (%)
Category 1 115 (71%)  
Category 2 48 (29%)  
Segmentation codeb n (%)
Code 1 47 (29%) 31 (20%)
Code 2 117 (71%) 125 (80%)
Psychological complaints (Mean ± SD) 28.4 ± 6.9 29.8 ± 6.4
(0 to 36 score) n = 89 (n = 51) (n = 38)
Self-efficacy for RTW (Mean ± SD) 3.0 ± 1.03 2.6 ± 1.25
(1 to 6 score)) n = 87 (n = 49) (n = 38)
Living area in the Netherlands n (%)
 East n = 111 58 (35%) 53 (34%)
 South-west n = 102 52 (32%) 50 (32%)
 South n = 107 54 (33%) 53 (34%)
  1. aBrainwork category 1 = estimated recovery < 3 months
  2. Brainwork category 2 = estimated recovery 3 to 12 months
  3. bSegmentation code 1 = estimated sick leave duration < 13 weeks
  4. Segmentation code 2 = estimated sick leave duration 13 to 52 weeks