Table 1 Study population baseline characteristics in a sample of male, non-smoking trucking industry workers
| Â | Total | P&D driver | Dock | Office |
|---|---|---|---|---|
Total no. | 67 | 35 | 14 | 18 |
Race (no. (%)) | Â | Â | Â | Â |
   White | 62 (93%) | 32 (91%) | 14 (100%) | 16 (89%) |
   Hispanic | 5 (7%) | 3 (9%) | 0 (0%) | 2 (11%) |
Age (years, mean ± SD) | 50.4 ± 8.5 | 51.1 ± 7.8 | 47.9 ± 11.0 | 50.8 ± 7.5 |
BMI (kg/m2, mean ± SD) | 30.4 ± 4.4 | 30.8 ± 4.1 | 29.8 ± 4.3 | 30.1 ± 5.2 |
Past smoker (no. (%)) | 36 (54%) | 23 (66%) | 6 (43%) | 7 (39%) |
Exercise (hrs/wk, mean ± SD) | 3.3 ± 3.7 | 2.3 ± 2.9 | 4.6 ± 5.4 | 4.4 ± 2.7 |
Hypertension (no. (%)) | 24 (36%) | 13 (37%) | 6 (43%) | 5 (28%) |
Heart disease (no. (%)) | 3 (4%) | 0 (0%) | 1 (7%) | 2 (11%) |
CHD (no. (%)) | 6 (9%) | 4 (11%) | 1 (7%) | 1 (6%) |
Diabetes (no. (%)) | 1 (1.5%) | 1 (3%) | 0 (0%) | 0 (0%) |
Medication use | Â | Â | Â | Â |
   Blood pressure | 19 (28%) | 9 (26%) | 5 (36%) | 5 (28%) |
   Lipid lowering | 24 (36%) | 14 (40%) | 4 (29%) | 6 (33%) |
   Aspirin | 17 (25%) | 9 (26%) | 2 (14%) | 6 (33%) |
Total workdays (mean ± SD) | 4.0 ± 0.5 | 3.9 ± 0.4 | 4.4 ± 0.5 | 3.9 ± 0.5 |
Avg shift duration (hrs, mean ± SD) | 9.5 ± 1.8 | 10.6 ± 1.0 | 8.6 ± 1.6 | 8.1 ± 1.9 |
Total hrs worked during study period | 45.8 ± 9.4 | 50.7 ± 6.9 | 41.7 ± 9.3 | 39.3 ± 8.8 |