Mean values and SD of age, height, weight and BMI grouped by working years
| Working years | Mean age (years) | Mean height (cm) | Mean weight (kg) | Mean BMI (kg/m2) |
| Group 1 | 34.7±9.0 | 179±7.5 | 91.3±22.9 | 28.3±6.0 |
| Group 2 | 46.35±7.1 | 178±6.4 | 91.15±21.1 | 28.64±5.9 |
| Group 3 | 55.8±4.3 | 179.2±6.9 | 97.6±16.2 | 30.4±4.8 |
BMI, body mass index.