Baseline covariates (n=69 842) and their association with job strain and incidence of all-cause disability pension (n=2572)
| Covariate | No. (%) of participants | Measure of job strain | Incidence of all-cause disability pension per 1000 person-years | |
| Occupation-based job strain | Work unit-based job strain | |||
| Mean (SD) | Mean (SD) | |||
| All | 69 842 (100) | 3.57 (0.45) | 3.58 (0.56) | 8.0 |
| Sex* | ||||
| Male | 16 613 (23.8) | 3.45 (0.41) | 3.49 (0.50) | 7.8 |
| Female | 53 229 (76.2) | 3.61 (0.45) | 3.60 (0.58) | 8.1 |
| Age†, years | ||||
| 17–39 | 21 771 (31.2) | 3.54 (0.43) | 3.55 (0.56) | 1.4 |
| 40–49 | 24 198 (34.6) | 3.57 (0.45) | 3.58 (0.56) | 4.6 |
| 50–59 | 22 062 (31.6) | 3.59 (0.46) | 3.60 (0.57) | 18.3 |
| 60–64 | 1811 (2.6) | 3.61 (0.48) | 3.62 (0.56) | 29.7 |
| Socioeconomic position† | ||||
| Upper non-manual | 20 942 (30.2) | 3.30 (0.30) | 3.39 (0.48) | 4.2 |
| Lower non-manual | 34 157 (49.3) | 3.62 (0.42) | 3.62 (0.56) | 7.5 |
| Manual | 14 216 (20.5) | 3.86 (0.48) | 3.79 (0.57) | 14.9 |
| Type of job contract† | ||||
| Temporary | 13 069 (19.2) | 3.51 (0.44) | 3.54 (0.56) | 3.1 |
| Permanent | 55 103 (80.8) | 3.58 (0.45) | 3.59 (0.56) | 9.3 |
| Physical illness† | ||||
| Yes | 7873 (11.3) | 3.60 (0.46) | 3.61 (0.57) | 20.7 |
| No | 61 969 (88.7) | 3.57 (0.44) | 3.57 (0.56) | 6.5 |
| Mental disorder† | ||||
| Yes | 3941 (5.6) | 3.58 (0.44) | 3.58 (0.56) | 25.8 |
| No | 65 901 (94.4) | 3.57 (0.45) | 3.58 (0.56) | 7.0 |
| Size of the work unit (person-years)† | ||||
| 3–19 | 28 656 (41.8) | 3.48 (0.43) | 3.43 (0.57) | 7.9 |
| 20–39 | 20 847 (30.4) | 3.56 (0.43) | 3.56 (0.54) | 7.4 |
| ≥40 | 19 066 (27.8) | 3.71 (0.46) | 3.79 (0.50) | 9.2 |
| Proportion (%) of temporary employees at work unit† | ||||
| 0–14 | 17 345 (25.3) | 3.56 (0.47) | 3.53 (0.55) | 10.5 |
| 14–28 | 25 647 (37.4) | 3.60 (0.46) | 3.59 (0.56) | 8.2 |
| 29–100 | 25 577 (37.3) | 3.54 (0.42) | 3.60 (0.56) | 6.5 |
| Mean age of employees at work unit† | ||||
| 15–40 | 12 169 (17.7) | 3.47 (0.40) | 3.47 (0.57) | 4.6 |
| 41–45 | 31 841 (46.4) | 3.59 (0.44) | 3.61 (0.54) | 7.1 |
| 46–64 | 24 559 (35.8) | 3.59 (0.47) | 3.59 (0.57) | 11.3 |