The WHO High 5s project: medication reconciliation in a German university hospital. A prospective observational cohort study.

BACKGROUND:Ensuring medication accuracy during transitions in care is one of the five highly prevalent patient safety problems focused on within the World Health Organization High 5s Project. Medication reconciliation is a standardized patient care process that can be used to address this problem. The aim of the current study is to implement medication reconciliation in a German university hospital. METHODS:The study was conducted at the Emergency Department of the University Hospital Aachen, Germany. All discrepancies between the Best Possible Medication History and the Admission Medication Order were documented and classified as documentation errors or medication errors. The type of error was also recorded. A negative binomial regression model was used to test several factors influencing the number of discrepancies. RESULTS:The medications of 105 patients were reconciled. The mean number of discrepancies per patient was 4.6± 3.6, with a total of 298 medication errors and 189 documentation errors. The most common type of medication error was the omission of a drug (n=208; 69.8 %). In the negative binomial regression analysis, the care status (p=0.0015) as well as the number of preadmission drugs (p=0.0007) were significantly associated with medication errors. DISCUSSION:A high number of discrepancies was detected and analysed. Patients admitted from nursing homes were less likely to have discrepancies in their medication reconciliation, perhaps because a structured documentation system for medications is already in place at nursing homes including error prone products (special dosage forms or food supplements). CONCLUSIONS:In this study, medication reconciliation was implemented at a German full-care university hospital. The actual number of discrepancies observed strongly indicates the need for medication reconciliation at hospital admission.