RT Journal Article SR Electronic T1 Effects of a multifaceted medication reconciliation quality improvement intervention on patient safety: final results of the MARQUIS study JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 954 OP 964 DO 10.1136/bmjqs-2018-008233 VO 27 IS 12 A1 Jeffrey L Schnipper A1 Amanda Mixon A1 Jason Stein A1 Tosha B Wetterneck A1 Peter J Kaboli A1 Stephanie Mueller A1 Stephanie Labonville A1 Jacquelyn A Minahan A1 Elisabeth Burdick A1 Endel John Orav A1 Jenna Goldstein A1 Nyryan V Nolido A1 Sunil Kripalani YR 2018 UL http://qualitysafety.bmj.com/content/27/12/954.abstract AB Background Unintentional discrepancies across care settings are a common form of medication error and can contribute to patient harm. Medication reconciliation can reduce discrepancies; however, effective implementation in real-world settings is challenging.Methods We conducted a pragmatic quality improvement (QI) study at five US hospitals, two of which included concurrent controls. The intervention consisted of local implementation of medication reconciliation best practices, utilising an evidence-based toolkit with 11 intervention components. Trained QI mentors conducted monthly site phone calls and two site visits during the intervention, which lasted from December 2011 through June 2014. The primary outcome was number of potentially harmful unintentional medication discrepancies per patient; secondary outcome was total discrepancies regardless of potential for harm. Time series analysis used multivariable Poisson regression.Results Across five sites, 1648 patients were sampled: 613 during baseline and 1035 during the implementation period. Overall, potentially harmful discrepancies did not decrease over time beyond baseline temporal trends, adjusted incidence rate ratio (IRR) 0.97 per month (95% CI 0.86 to 1.08), p=0.53. The intervention was associated with a reduction in total medication discrepancies, IRR 0.92 per month (95% CI 0.87 to 0.97), p=0.002. Of the four sites that implemented interventions, three had reductions in potentially harmful discrepancies. The fourth site, which implemented interventions and installed a new electronic health record (EHR), saw an increase in discrepancies, as did the fifth site, which did not implement any interventions but also installed a new EHR.Conclusions Mentored implementation of a multifaceted medication reconciliation QI initiative was associated with a reduction in total, but not potentially harmful, medication discrepancies. The effect of EHR implementation on medication discrepancies warrants further study.Trial registration number NCT01337063.