title: When can a risk factor be used as a worthwhile screening test?
authors.affiliation: Department of Environmental Medicine, Wolfson Institute of Preventive Medicine, St Bartholomew's Hospital, London EC1M 6BQ. n.j.wald@mds.qmw.ac.uk
authors.forename: N J
authors.initials: NJ
authors.lastname: Wald
authors.forename: A K
authors.initials: AK
authors.lastname: Hackshaw
authors.forename: C D
authors.initials: CD
authors.lastname: Frost
mesh_terms: D005189:False Positive Reactions; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D016017:Odds Ratio; D018570:Risk Assessment; D012307:Risk Factors; D012680:Sensitivity and Specificity