Table 1 Descriptive statistics at baseline
Occupational social class | |||||
|---|---|---|---|---|---|
| Â | Unskilled blue-collar | Skilled blue-collar | Lower white-collar | Upper white-collar | Total (n) |
Total, n (%)a | 285 (33.73) | 158 (18.70) | 197 (23.31) | 205 (24.26) | 845 |
Mean age (SD) | 59 (3.30) | 60 (3.87) | 60 (3.38) | 59 (3.22) | 59 (3.42) |
Sex, n (%)b | |||||
Women | 190 (66.7) | 35 (22.2) | 96 (48.7) | 74 (36.1) | 395 (46.7) |
Men | 95 (33.3) | 123 (77.8) | 101 (51.3) | 131 (63.9) | 450 (53.3) |
Physical working conditions, n (%)b | |||||
 No exposure | 63 (22.1) | 31 (19.6) | 100 (50.8) | 137 (66.8) | 331 (39.2) |
 Low exposure | 147 (51.6) | 52 (32.9) | 51 (25.9) | 58 (28.3) | 308 (36.4) |
 High Exposure | 75 (26.3) | 75 (47.5) | 46 (23.3) | 10 (4.9) | 206 (24.4) |
Psychosocial working conditions, n (%)b | |||||
 Passive | 204 (71.5) | 94 (59.5) | 78 (39.6) | 18 (8.8) | 394 (46.6) |
 High-strain | 43 (15.1) | 18 (11.4) | 39 (19.8) | 19 (9.2) | 119 (14.1) |
 Low-strain | 21 (7.4) | 34 (21.5) | 50 (25.4) | 83 (40.5) | 188 (22.2) |
 Active | 17 (6.0) | 12 (7.6) | 30 (15.2) | 85 (41.5) | 144 (17.0) |
Level of education, n (%) | |||||
 Compulsory | 160 (78.1) | 97 (49.2) | 48 (30.4) | 51 (17.9) | 356 (42.1) |
 Beyond compulsory | 45 (22.0) | 100 (50.8) | 110 (69.6) | 234 (82.1) | 489 (57.9) |
Health problems at baseline, n (%)b | |||||
 None or mild | 224 (78.6) | 134 (84.8) | 173 (87.8) | 191 (93.2) | 722 (85.4) |
 Severe | 61 (21.4) | 24 (15.2) | 24 (12.2) | 14 (6.8) | 123 (14.6) |
Mobility at baseline, n (%)b | |||||
 Unrestricted | 214 (75.1) | 126 (79.7) | 159 (80.7) | 183 (89.3) | 682 (80.7) |
 Restricted | 71 (24.9) | 32 (20.3) | 38 (19.3) | 22 (10.7) | 163 (19.3) |