Table 5

Cigarette smoking: multivariate-adjusteda ORs (95% CI) for adenomatous and hyperplastic polyps versus controls

Smoking variablesAdenomatous polypsHyperplastic polyps
Smoking status
 Never-smoker1.01.0
 Ex-smoker1.4 (1.1–1.9)2.4 (1.6–3.6)
 Current smoker2.0 (1.4–2.9)4.1 (2.6–6.5)
Pack years
 01.01.0
 1–191.4 (1.0–2.0)2.4 (1.6–3.7)
 ≥201.9 (1.4–2.6)3.2 (2.1–4.9)
  • a Adjusted for age, sex, nonsteroidal anti-inflammatory drug use, and hormonal replacement therapy use.