Baseline characteristics
| Characteristics | All participants (n=263) | iSMI (n=131) | WLC (n=132) |
|---|---|---|---|
| Sociodemographic characteristics | |||
| Age (years), M (SD) | 42 (9) | 41 (9) | 42 (9) |
| Gender, female, n (%) | 188 (72) | 97 (74) | 91 (69) |
| Married or in a relationship, n (%) | 161 (61) | 81 (62) | 80 (61) |
| Ethnicity, n (%) | |||
| Caucasian/white | 219 (83) | 107 (82) | 112 (85) |
| Asian | 1 (1) | 1 (1) | 0 (0) |
| Prefer not to say | 43 (16) | 23 (18) | 20 (15) |
| Educational level, n (%) | |||
| Low | 11 (4) | 6 (5) | 5 (4) |
| Middle | 75 (29) | 39 (30) | 36 (27) |
| High | 177 (67) | 86 (66) | 91 (69) |
| Working characteristics | |||
| Full-time, n (%) | 196 (75) | 93 (71) | 103 (78) |
| Part-time, n (%) | 62 (24) | 35 (27) | 27 (21) |
| On sick leave, n (%) | 5 (2) | 3 (2) | 2 (2) |
| Work experience in years, M (SD) | 18 (10) | 17 (10) | 18 (9) |
| Working sectors, n (%) | |||
| Economy | 55 (21) | 22 (17) | 33 (25) |
| Service | 50 (19) | 34 (26) | 16 (12) |
| Social | 47 (18) | 19 (15) | 28 (21) |
| Health | 35 (13) | 17 (13) | 18 (14) |
| IT | 22 (8) | 11 (8) | 11 (8) |
| Others | 54 (21) | 28 (21) | 26 (20) |
| Income in Euros, per year, n (%) | |||
| <10 000 | 2 (1) | 1 (1) | 1 (1) |
| 10 000–30 000 | 68 (26) | 38 (29) | 30 (23) |
| 30 000–40 000 | 72 (27) | 40 (31) | 32 (24) |
| 40 000–50 000 | 38 (14) | 12 (9) | 26 (20) |
| 50 000–60 000 | 23 (9) | 14 (11) | 9 (7) |
| 60 000–100 00 | 28 (11) | 15 (12) | 13 (10) |
| >100 000 | 12 (5) | 4 (3) | 8 (6) |
| Prefer not to say | 20 (8) | 7 (5) | 13 (10) |
| Experience, n (%) | |||
| Previous health training | 35 (13) | 14 (11) | 21 (16) |
| Previous psychotherapy | 76 (29) | 37 (28) | 39 (30) |
| Current psychotherapy | 25 (10) | 10 (8) | 15 (11) |
iSMI, internet-based stress management intervention; IT, Information Technology; M, mean; n, number; WLC, wait-list control group.