Table 1.
Participant characteristics at baseline.
| Characteristic | All participants (N = 504) | Control (N = 251) | Intervention (N = 253) |
|---|---|---|---|
| Recruitment method | |||
| On-site, n (%) | 356 (70.63) | 175 (69.72) | 181 (71.54) |
| Online, n (%) | 148 (29.37) | 76 (30.28) | 72 (28.46) |
| Socio-demographics | |||
| Age, M (SD) | 51.59 (8.55) | 52.1 (8.19) | 51.09 (8.88) |
| Gender, female, n (%) | 309 (61.31) | 160 (63.75) | 149 (58.89) |
| In a relationship, yes, n (%) | 365 (72.42) | 185 (73.71) | 180 (71.15) |
| Children, yes, n (%) | 402 (79.76) | 202 (80.48) | 200 (79.05) |
| Current sick leave, yes, n (%) | 351 (69.64) | 173 (68.92) | 178 (70.36) |
| Lifetime SCID diagnosis, yes, n (%) | 219 (43.45) | 110 (43.82) | 109 (43.08) |
| Marital status | |||
| Single, n (%) | 50 (9.92) | 23 (9.16) | 27 (10.67) |
| Relationship/married, n (%) | 365 (72.42) | 185 (73.71) | 180 (71.15) |
| Divorced/separated, n (%) | 74 (14.68) | 35 (13.94) | 39 (15.42) |
| Widowed, n (%) | 15 (2.98) | 8 (3.19) | 7 (2.77) |
| Educational level | |||
| No formal education (completed), n (%) | 76 (15.08) | 28 (11.16) | 48 (18.97) |
| Up to high school (7–9 years), n (%) | 164 (32.54) | 87 (34.66) | 77 (30.43) |
| High school education (12–13 years), n (%) | 201 (39.88) | 105 (41.83) | 96 (37.94) |
| After high school, n (%) | 39 (7.74) | 20 (7.97) | 19 (7.51) |
| Social support | |||
| Little social support, n (%) | 142 (28.17) | 75 (29.88) | 67 (26.48) |
| Sufficient social support, n (%) | 146 (28.07) | 65 (25.9) | 81 (32.01) |
| Good social support, n (%) | 147 (29.17) | 74 (29.48) | 73 (28.85) |
| Very good social support, n (%) | 51 (10.12) | 28 (11.16) | 23 (9.09) |
| Prior treatment experience | |||
| Previous psychotherapy experience, yes, n (%) | 182 (36.11) | 91 (36.25) | 91 (35.97) |
| Previous depression medication, yes, n (%) | 142 (28.17) | 71 (28.29) | 71 (28.06) |
| Previous back pain medication, yes, n (%) | 322 (63.89) | 160 (63.75) | 162 (64.03) |