Table 1.
Work organization.
| Age. Driver Years of Experience, Work Organization Characteristics | N (%) |
|---|---|
| Age | |
| 18–39 | 69 (26.5) |
| 40–49 | 73 (28.1) |
| 50 and older | 118 (45.4) |
| Years of Experience | |
| Less than 10 years | 97 (37.3) |
| 10–19 years | 79 (30.4) |
| 20 or more years | 84 (32.3) |
| Days on road per month | |
| 20 or less days | 40 (15.4) |
| 21–25 days | 110 (42.3) |
| 26 or more days | 110 (42.3) |
| Work hours per day | |
| Less than 11 h | 77 (29.8) |
| 11–13 h | 83 (32.1) |
| 13 or more hours | 99 (38.3) |
| Daily schedule | |
| Same each day | 45 (17.3) |
| Different each day | 215 (82.7) |
| Hours of day | |
| Same each day | 94 (36.2) |
| Different each day | 166 (63.8) |
| Days of week | |
| Same each week | 175 (67.6) |
| Different each week | 84 (32.4) |
| Fast pace of work | |
| Never or rarely | 83 (32.1) |
| Sometimes | 56 (21.6) |
| Often or always | 120 (46.4) |
| Coworker support | |
| Never or rarely | 57 (30.0) |
| Sometimes | 40 (21.1) |
| Often or always | 93 (48.9) |
| Supervisor support | |
| Never or rarely | 21 (8.4) |
| Sometimes | 38 (15.3) |
| Often or always | 189 (76.2) |