Journal Article
Study

Methodological variability in detecting prescribing errors and consequences for the evaluation of interventions.

Franklin BD, Birch S, Savage I, et al. Pharmacoepidemiology and drug safety. 2009;18:992-9.

Four different strategies for identification of medication errors—prospective identification by pharmacists, retrospective chart review, use of a trigger tool, and voluntary reporting—each yielded a different estimate of the incidence of errors.