Smoking status | Reference group 1: non-smokers (exposed and not exposed to ETS) | ||||||||
---|---|---|---|---|---|---|---|---|---|
Patients with stroke (n = 521) | Community controls (n = 1851) | OR3-150 | 95% CI | ||||||
n | (%) | n | (%) | ||||||
Never smoked | 162 | 31.1 | 901 | 48.7 | 1.00 | Referent | |||
Active smokers | 164 | 31.5 | 255 | 13.8 | 4.14 | 3.04–5.63 | |||
⩾15 cigarettes/day | 95 | 18.2 | 154 | 8.3 | 4.59 | 3.17–6.63 | |||
6–14 cigarettes/day | 42 | 8.1 | 62 | 3.4 | 4.37 | 2.61–7.32 | |||
⩽5 cigarettes/day | 27 | 5.2 | 39 | 2.1 | 2.56 | 1.35–4.88 | |||
Ex-smokers | 174 | 33.4 | 671 | 36.2 | 1.00 | 0.75–1.32 | |||
<2 years | 22 | 4.2 | 46 | 2.4 | 2.30 | 1.24–4.27 | |||
2–10 years | 49 | 9.4 | 190 | 10.3 | 1.23 | 0.80–1.88 | |||
>10 years | 103 | 19.8 | 435 | 23.5 | 0.79 | 0.57–2.51 |
↵3-150 Adjusted for age, sex, diabetes, hypertension, and history of heart disease in logistic regression analysis.
ETS = environmental tobacco smoke; OR = odds ratios; CI = confidence intervals.