Table 2

Age adjusted crude odds ratio

20–30 years31–40 years41–50 years
SmokerNon-smokerSmokerNon-smokerSmokerNon-smoker
Age adjusted odds ratio 2.24 (95% CI 1.27 to 3.94), p<0.05 (Mantel-Hanszel estimate).
Cases1311223297
Controls7811095617935