title: Objectives and interpretations.
authors.affiliation: Epidemiology Unit, Imperial Chemical Industries plc, Alderley Park, Macclesfield, U.K.
authors.forename: G M
authors.initials: GM
authors.lastname: Paddle
mesh_terms: D003663:Decision Trees; D004812:Epidemiologic Methods; D004813:Epidemiology / Q000592:standards; D012107:Research Design; D013223:Statistics as Topic