title: [What does a 50 percent reduction of risk mean? Results from clinical trials are often misleading].
authors.affiliation: Norra Alvsborgs länssjukhus, medlem i Statens beredning för utvärdering av medicinsk metodik.
authors.forename: C
authors.initials: C
authors.lastname: Enkvist
authors.forename: L
authors.initials: L
authors.lastname: Werkö
mesh_terms: D002986:Clinical Trials as Topic; D004358:Drug Therapy; D005069:Evaluation Studies as Topic; D006801:Humans; D008403:Mass Screening; D015203:Reproducibility of Results; D012307:Risk Factors; D013223:Statistics as Topic
vernacular_title: Vad betyder 50 procent mindre risk? Resultat från kliniska prövningar ofta missledande.