Table 1 Mean Body Mass Index in Relation to Socio-demographics and Working Conditions in both Genders
| Â | Men (N = 519)** | Women (N = 531) | ||||
|---|---|---|---|---|---|---|
| Â | BMI (SD) | N (%) | p value* | BMI (SD) | N (%) | p value* |
Age | Â | Â | <0.001 | Â | Â | <0.001 |
   < 30 years | 24.3 (3.2) | 118 (22.7) |  | 22.7 (4.8) | 125 (23.5) |  |
   30–40 years | 26.0 (4.5) | 157 (30.3) |  | 24.7 (4.7) | 150 (28.2) |  |
   41–50 years | 26.8 (3.8) | 122 (23.5) |  | 24.9 (4.4) | 149 (28.1) |  |
   ? 51 years | 27.2 (5.0) | 122 (23.5) |  | 25.7 (4.8) | 107 (20.2) |  |
Educational level | Â | Â | 0.037 | Â | Â | 0.036 |
   Post-graduate | 26.1 (4.7) | 47 (9.1) |  | 24.4 (3.8) | 52 (9.8) |  |
   Undergraduate | 25.9 (3.7) | 128 (24.9) |  | 24.5 (4.8) | 204 (38.6) |  |
   Vocational | 26.6 (3.9) | 127 (24.7) |  | 24.0 (4.4) | 71 (13.4) |  |
   High school | 24.9 (5.1) | 89 (17.3) |  | 23.5 (4.5) | 101 (19.1) |  |
   Primary or secondary | 26.7 (4.6) | 123 (23.9) |  | 25.5 (5.3) | 101 (19.1) |  |
Marital status | Â | Â | <0.001 | Â | Â | 0.004 |
   Living as a couple | 25.1 (4.0) | 216 (41.6) |  | 23.8 (4.8) | 230 (43.4) |  |
   Living alone | 26.8 (4.4) | 303 (58.4) |  | 25.0 (4.7) | 300 (56.6) |  |
Living with children | Â | Â | 0.767 | Â | Â | 0.536 |
   No | 26.1 (4.4) | 294 (56.6) |  | 24.4 (5.2) | 272 (51.3) |  |
   Yes | 26.2 (4.2) | 225 (43.4) |  | 24.6 (4.3) | 258 (48.7) |  |
Hostility | Â | Â | 0.975 | Â | Â | 0.359 |
   Low | 26.1 (4.1) | 272 (52.4) |  | 24.7 (5.0) | 243 (45.8) |  |
   High | 26.1 (4.6) | 247 (47.6) |  | 24.3 (4.6) | 288 (54.2) |  |
Occupational category | Â | Â | 0.531 | Â | Â | 0.156 |
   Upper white collar | 26.1 (3.9) | 152 (29.3) |  | 24.9 (4.7) | 198 (37.3) |  |
   Middle white collar | 25.7 (4.8) | 122 (23.5) |  | 24.4 (4.8) | 266 (50.1) |  |
   Blue collar | 26.3 (4.3) | 245 (47.2) |  | 23.6 (4.7) | 67 (12.6) |  |
Hour worked | Â | Â | <0.001 | Â | Â | 0.467 |
   <35 hours | 24.2 (3.3) | 77 (15.3) |  | 24.6 (4.7) | 241 (46.9) |  |
   35 to 49 hours | 26.2 (4.4) | 258 (51.3) |  | 24.2 (5.1) | 198 (38.5) |  |
   >49 hours | 26.9 (4.0) | 168 (33.4) |  | 24.9 (4.5) | 75 (14.6) |  |
Psychological work demand | Â | Â | 0.162 | Â | Â | 0.473 |
   Low | 25.8 (3.9) | 293 (59.1) |  | 24.3 (4.9) | 271 (52.0) |  |
   High | 26.3 (4.8) | 203 (40.9) |  | 24.6 (4.7) | 250 (48.0) |  |
Control | Â | Â | 0.144 | Â | Â | 0.119 |
   High | 26.4 (4.2) | 255 (49.2) |  | 24.9 (4.6) | 214 (41.0) |  |
   Low | 25.8 (4.4) | 263 (50.8) |  | 24.2 (4.8) | 308 (59.0) |  |
Demand/Control | Â | Â | 0.151 | Â | Â | 0.479 |
   Low strain | 26.1 (4.3) | 138 (27.9) |  | 24.8 (4.5) | 99 (19.3) |  |
   Active jobs | 26.6 (4.1) | 110 (22.2) |  | 24.8 (4.6) | 112 (21.8) |  |
   Passive jobs | 25.5 (3.6) | 155 (31.3) |  | 24.0 (4.9) | 167 (32.6) |  |
   Job strain | 26.1 (5.5) | 92 (18.6) |  | 24.4 (4.8) | 135 (26.3) |  |
Effort | Â | Â | 0.004 | Â | Â | 0.338 |
   Low | 25.6 (3.8) | 290 (56.8) |  | 24.3 (4.7) | 282 (53.9) |  |
   High | 26.7 (4.9) | 221 (43.2) |  | 24.7 (4.9) | 241 (46.1) |  |
Reward | Â | Â | 0.938 | Â | Â | 0.024 |
   High | 26.0 (3.7) | 228 (47.7) |  | 24.9 (4.7) | 261 (51.0) |  |
   Low | 26.0 (5.0) | 250 (52.3) |  | 24.0 (4.7) | 251 (49.0) |  |
Effort/Reward ratio | Â | Â | 0.898 | Â | Â | 0.404 |
   ? 1: Balance | 26.0 (4.4) | 455 (96.0) |  | 24.5 (4.7) | 488 (96.4) |  |
   > 1: Imbalance | 25.9 (4.0) | 19 (4.0) |  | 23.6 (4.1) | 18 (3.6) |  |
Physical work demand | Â | Â | 0.009 | Â | Â | 0.388 |
   Low | 26.7 (4.3) | 202 (39.2) |  | 24.3 (4.6) | 258 (48.9) |  |
   High | 25.7 (4.3) | 313 (60.8) |  | 24.7 (4.9) | 270 (51.1) |  |
Shift work | Â | Â | 0.262 | Â | Â | 0.823 |
   No | 26.2 (4.3) | 454 (87.5) |  | 24.5 (4.9) | 466 (87.8) |  |
   Yes | 25.5 (4.6) | 65 (12.5) |  | 24.6 (4.0) | 65 (12.2) |  |