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Table 1 Characteristics of the study samples based on register data

From: Long-term follow-up of disability pensioners having musculoskeletal disorders

Variables

Group 1

Participants RCT

(n = 89)

Group 2

Non-participants

(n = 361)

Group 3

Musculoskeletal

(n = 449)

 

Intervention

(n = 45)

Control

(n = 44)

  

Age, yrs: mean (SD)

49.1 (6.4)

49.0 (4.5)

50.0 (5.7)

49.6 (5.9)

Gender, female: n (%)

26 (60.0)

30 (69.8)

200 (55)

355 (79)

DP, yrs: mean (SD)

9.8 (4.8)

11.6 (5.8)

11.0 (5.9)

9.8 (4.8)

DP at 1-year follow-up*

    

   Full time employed: n (%)

-

-

-

-

   0<DP≤50: n (%)

-

-

-

1 (0.2)

   50<DP<100: n (%)

1 (2.3)

2 (4.6)

4 (1.2)

2 (0.4)

   Full time DP

42 (97.7)

42 (95.5)

352 (97.5)

441 (98.2)

DP at 3-year follow-up*

    

   Full time employed: n (%)

-

-

-

1 (0.2)

   0<DP≤50: n (%)

-

1 (2.3)

-

-

   50<DP<100: n (%)

-

1 (2.3)

4 (1.2)

8 (1.6)

   Full time DP

43 (100)

42 (95.5)

345 (98.8)

432 (98.4)

  1. Group 1: Disability pensioners with back pain participating in the RCT, Group 2: Disability pensioners with back pain, invited, but not willing to participate in the RCT, Group 3 Disability pensioners with other musculoskeletal disorders not invited to participate in the RCT. DP = disability pension. *Numbers are given in valid percent. Two were missing in the intervention group, 12 were missing in Group 2 and 8 were missing in Group 3 at 3 year follow-up.