Table 1 Background characteristics of the control- and treatment group for the intention-to-treat analysis. Mean, standard deviation (SD) and [range] of each variable

Male, %

42

43

1

0.435

Age at randomisation

46 (12) [19–67]

46 (11) [18–66]

0.2

0.568

Days on sick leave the past year

34 (54) [0–273]

31 (50) [0–266]

− 2.5

0.126

Days on sick leave the past two years

18 (54) [0–388]

17 (59) [0–386]

− 0.6

0.715

Days on sick leave before randomisation

139 (23) [0–367]

140 (60) [0–327]

0.8

0.275

N

2599

1698