Descriptive statistic for physical measurements and health habits
| Variable | Exposed Mean (SD) | Non-exposed Mean (SD) | p Value |
| Age (y) | 39.0 (8.7) | 35.5 (11.8) | NS |
| Education (y) | 10.0 (2.7) | 12.2 (2.2) | <0.001 |
| SBP (mm Hg) | 116 (12.9) | 120 (14.7) | NS |
| DBP (mm Hg) | 75 (9.5) | 76 (9.1) | NS |
| BMI (kg/m2) | 27.8 (4.0) | 25.7 (3.3) | NS |
| Alcohol (drinks/week) | 0.5 (1.5) | 0.7 (0.6) | NS |
| Coffee (cups/day) | 3.21 (0.4) | 1.3 (1.2) | <0.001 |
| Smoking (pack-years) | 11.8 (1.6) | 7.7 (12.0) | NS |
| Sleep (hours/night) | 6.4 (1.1) | 6.8 (0.9) | 0.04 |
| Self rated health (units) | 9.1 (1.8) | 8.4 (1.4) | 0.05 |
SBP=systolic blood pressure; DBP=diastolic blood pressure; BMI=body mass index.