title: Odds ratios should be avoided when events are common.
authors.forename: D G
authors.initials: DG
authors.lastname: Altman
authors.forename: J J
authors.initials: JJ
authors.lastname: Deeks
authors.forename: D L
authors.initials: DL
authors.lastname: Sackett
mesh_terms: D016017:Odds Ratio; D018570:Risk Assessment; D019460:Tobacco Industry; D014028:Tobacco Smoke Pollution / Q000009:adverse effects
chemical_list: D014028:Tobacco Smoke Pollution