The prevalence of medication-related adverse events in inpatients—a systematic review and meta-analysis

• Published in: European journal of clinical pharmacology Vol. 73; no. 12; pp. 1539 - 1549
• Main Authors: Laatikainen, Outi, Miettunen, J., Sneck, S., Lehtiniemi, H., Tenhunen, O., Turpeinen, M.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.12.2017; Springer Nature B.V
• Subjects: Biomedical and Life Sciences; Biomedicine; Drug-Related Side Effects and Adverse Reactions - epidemiology; Hospitalization; Humans; Inpatient care; Inpatients; Length of Stay; Meta-analysis; Patient safety; Pharmacology/Toxicology; Prevalence; Review; Side effects; Studies; Pharmacoepidemiology; Clinical pharmacology; Adverse drug events; Drug safety
• ISSN: 0031-6970; 1432-1041
• DOI: 10.1007/s00228-017-2330-3

Purpose Adverse drug events (ADEs) have been internationally recognized as a major threat to patient safety. The purpose of this study was to conduct a meta-analysis focusing on inpatient ADEs in the Western World to provide better estimate of the current state of medication safety in these countries. Methods The studies for meta-analysis were identified through electronic search in Cochrane, Scopus, Medline, and Web of science databases. Included articles focused on adult inpatient ADEs, had commonly accepted definition for ADE, and were conducted between 2000 and 2016. Disease or ADE-specific studies were excluded. Meta-analysis was conducted on the prevalence of inpatient ADEs and fatal adverse drug reactions (FADRs). Results The pooled estimate of the prevalence of inpatient ADEs was formed by 46,626 patient records included in 9 articles. Inpatient ADE prevalence was 19 and 32.3% of these ADEs were assessed preventable (MD 28.6%, SD 22.6%). Three articles including 3385 patients focused on inpatient FADRs, but the pooled estimate of this was disregarded due to low number and high heterogeneity of the included studies. Conclusions ADEs are estimated to affect 19% of inpatients during hospitalization. Most of the ADEs are moderate in severity causing no permanent harm to the patient. Only a small amount of ADEs cause inpatient deaths, but in this meta-analysis, however, we were unable to give direct estimate of the prevalence.