The Impact of Computerized Physician Order Entry on Medication Error Prevention
Open accessAbstract
BACKGROUND: Medication errors are common, and while most such errors have little potential for harm they cause substantial extra work in hospitals. A small proportion do have the potential to cause injury, and some cause preventable adverse drug events. OBJECTIVE: To evaluate the impact of computerized physician order entry (POE) with decision support in reducing the number of medication errors. DESIGN: Prospective time series analysis, with four periods. SETTING AND PARTICIPANTS: All patients admitted to three medical units were studied for seven to ten-week periods in four different years. The baseline period was before implementation of POE, and the remaining three were after. Sophistication of POE increased with each successive period. INTERVENTION: Physician order entry with decision support features such as drug allergy and drug-drug interaction warnings. MAIN OUTCOME MEASURE: Medication errors, excluding missed dose errors. RESULTS: During the study, the non-missed-dose medication error rate fell 81 percent, from 142 per 1,000 patient-days in the baseline period to 26.6 per 1,000 patient-days in the final period (P < 0.0001). Non-intercepted serious medication errors (those with the potential to cause injury) fell 86 percent from baseline to period 3, the final period (P = 0.0003). Large differences were seen for all main types of medication errors: dose errors, frequency errors, route errors, substitution errors, and allergies. For example, in the baseline period there were ten allergy errors, but only two in the following three periods combined (P < 0.0001). CONCLUSIONS: Computerized POE substantially decreased the rate of non-missed-dose medication errors. A major reduction in errors was achieved with the initial version of the system, and further reductions were found with addition of decision support features.
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- Authors
- Bates, D. W., Teich, J. M., Lee, J., Seger, D., Kuperman, G. J., Ma'Luf, N., Boyle, D., & Leape, L.
- Affiliations
- Brigham and Women's Hospital (US)
- Corresponding author
- Bates, D. W.
- Venue
- Journal of the American Medical Informatics Association
- Publisher
- Oxford University Press (OUP)
- Published
- 1999-07-01
- Volume
- 6
- Issue
- 4
- Pages
- 313-321
- ISSN
- 1067-5027 (ISSN-L)
- 1527-974X
- PMC
- PMC61372
- OpenAlex
- W2142997978
- Cited by
- 1,260
- References
- 27
- Citations by year
- 2026: 10 · 2025: 10 · 2024: 9 · 2023: 18 · 2022: 15 · 2021: 26 · 2020: 30 · 2019: 25 · 2018: 24 · 2017: 37 · 2016: 38 · 2015: 48 · 2014: 54 · 2013: 59 · 2012: 80
- FWCI
- 49.28
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of the American Medical Informatics Association (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Brigham and Women's Hospital
- Topics
- Health Sciences › Health Professions › Emergency Medical Services › Patient Safety and Medication Errors
- Health Sciences › Health Professions › Health Information Management › Electronic Health Records Systems
- Health Sciences › Medicine › Geriatrics and Gerontology › Pharmaceutical Practices and Patient Outcomes
- Keywords
- computerized physician order entry, medication errors, clinical decision support, adverse drug reactions, dosing errors, substitution errors
- MeSH terms
- Drug Therapy, Computer-Assisted, Hospitals, Teaching, Humans, Massachusetts, Medication Errors, Medication Systems, Hospital, User-Computer Interface, Clinical Pharmacy Information Systems, Medical Records Systems, Computerized, Decision Support Systems, Clinical, Drug-Related Side Effects and Adverse Reactions
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