| Table 1: Demographic characteristics of the studied groups. Figures are either mean (SD) or n (%). | |||
| Variable | Exposed group (n=60) | Unexposed group (n=60) | p value |
| Age (yr) | 35.8 (9.2) | 38.5 (8.7) | 0.958 |
| Height (cm) | 174.1 (7.2) | 175.1 (6.3) | 0.326 |
| Weight (kg) | 78.2 (13.0) | 80.5 (11.5) | 0.174 |
| BMI (kg/m2) | 25.8 (3.9) | 26.3 (3.7) | 0.689 |
| Length of employment (yr) | 11.1 (7.1) | 12.5 (8.7) | 0.052 |
| Level of education | |||
| Illiterate | 42 (70%) | 7 (12%) | 0.001 |
| Diploma | 15 (25%) | 14 (23%) | |
| Graduate | 2 (3%) | 23 (38%) | |
| Post graduate | 1 (2%) | 16 (27%) | |
| Marital status | |||
| Single | 4 (7%) | 10 (17%) | 0.084 |
| Married | 56 (93%) | 50 (83%) | |
| Smokers | |||
| Yes | 26 (43%) | 16 (27%) | 0.084 |
| No | 34 (57%) | 44 (73%) | |
| Length of smoking (yr) | 3.7 (5.9) | 2.7 (8.2) | 0.100 |
| Number of cigarettes smoked per day | 2.3 (5.3) | 1.1 (3.4) | 0.073 |
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