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Table 1 Baseline characteristics of the non-responders and responders

From: Effects of a randomized controlled intervention trial on return to work and health care utilization after long-term sickness absence

N = 1352 Non-responders n = 909 Responders n = 443 p value
Women, n (%) 520 (57) 273 (62) 0.12 A
Age, average years (SD) 41.3 (11.8) 44.4 (10.8) 0.05 B
Work n (%)    0.15 A
Farming, fishery, industry 150 (17) 65 (15)  
Construction, trading and transport 231 (25) 109 (25)  
Communication, information, finance, insurance, real estate and consultancy 103 (11) 49 (11)  
Public administration, teaching, health, culture and leisure 329 (36) 189 (43)  
Other 36 (4) 11 (2)  
Missing 60 (7) 20 (5)  
Self-reported reason for sickness absence n (%)    <0.001 A
Musculoskeletal disorder (MSD) 387 (43) 244 (55)  
Common mental disorder (CMD) 294 (32) 94 (21)  
Stress 95 (19) 52 (12)  
Functional somatic syndrome/unknown 19 (2) 10 (2)  
Heart disorder, lung disorder, cancer 36 (4) 12 (3)  
Other 78 (9) 31 (7)  
Previous year before inclusion median (iqr)
Employment or unemployment, weeks 42 (26-46) 42 (33-45) 0.35 C
Duration of sickness absence, weeks 7 (5-12) 7 (6-11) 0.43 C
Health care utilization
Visits in general practice 11 (7-18) 12 (7-18) 0.30 C
Visits in physiotherapist clinics 0 (0-0) 0 (0-1) 0.30 C
Visits in out-patient clinics 2 (1-6) 3 (1-6) 0.58 C
Visits in psychiatric out-patient clinics 0 (0-0) 0 (0-0) 0.19 C
Admissions in hospitals 0 (0-0) 0 (0-0) 0.45 C
Admissions in psychiatric hospitals 0 (0-0) 0 (0-0) 0.02 C
One year after inclusion
Labour market participation n (%)    0.92 A
Non-RTW 309 (34) 146 (33)  
RTW 548 (60) 273 (62)  
Old age and disability pension 50 (6) 22 (5)  
Died 2 (0) 2 (0)  
  1. A Chi2 test, B t-test, C Wilcoxon rank sum test