Description of samples, 1996 and 1997
| 1996 | 1997 | |
|---|---|---|
| *N (%); †mean (SD). | ||
| Production units* | 6 | 5 |
| Total workers* | 253 | 191 |
| Female* | 158 (62%) | 117 (61%) |
| Age (years)† | 40.2 (7.3) | 41.1 (7.4) |
| BMI (kg/m2)† | 24.3 (4.4) | 24.4 (4.4) |
| Years of service (years)† | 20.3 (4.4) | 21.2 (4.3) |
| Years at work situation (years)† | 15.0 (9.7) | 16.9 (9.8) |