Variable | Unadjusted OR (95% CI) | Adjusted OR* (95% CI) | p for trend |
Non-smokers (n=536) | 1.00 (reference) | 1.00 (reference) | <0.01 |
Past smokers (n=65) | 1.69 (0.86 to 3.30) | 1.79 (0.86 to 3.75) | |
Current smokers (n=251) | 2.79 (1.72 to 4.51) | 2.84 (1.63 to 4.97) | |
Cumulative dose of smokers (pack years) | |||
1–9 | 1.81 (1.00 to 3.30) | 2.09 (1.07 to 4.11) | <0.01 |
10–19 | 2.11 (1.14 to 3.90) | 2.05 (1.03 to 4.09) | |
20–29 | 3.15 (1.59 to 6.27) | 3.25 (1.52 to 6.94) | |
≥30 | 6.13 (2.89 to 13.0) | 5.69 (2.51 to 12.9) |
↵* Adjusted for family history of stroke, hypertension, diabetes, hyperlipidaemia and cardiovascular diseases as well as body mass index, alcohol consumption, high salt intake and laborious work hours.