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Adverse drug events in U.S. adult ambulatory... [Health Serv Res. 2011] - PubMed - NCBI

Health Serv Res. 2011 Oct;46(5):1517-33. doi: 10.1111/j.1475-6773.2011.01269.x. Epub 2011 May 10.

Adverse drug events in U.S. adult ambulatory medical care.


Department of Medicine, UCSF Center for Vulnerable Populations, San Francisco General Hospital Medical Services, Division of General Internal Medicine, University of California, San Francisco (UCSF), Box 1364, 1001 Potrero, Bldg 10, 3rd Floor, San Francisco, CA 94143-1364, USA.



To estimate the incidence of adverse drug events (ADEs) associated with health care visits among U.S. adults across all ambulatory settings.


We analyzed data from two nationally representative probability sample surveys: the National Ambulatory Medical Care Survey and the National Hospital and Ambulatory Medical Care Survey. From 2005 to 2007, the presence of an ADE was specifically defined, requested, and recorded in these surveys.


Secondary data analysis.


An estimated 13.5 million ADE-related visits occurred between 2005 and 2007 (0.5 percent of all visits), the large majority (72 percent) occurring in outpatient practice settings, and the remaining in emergency departments. Older patients (age ≥65 years) had the highest age-specific ADE rate, 3.8 ADEs per 10,000 persons per year. In adjusted analyses of outpatient visits, there was an increased odds of an ADE-related visit with increased medication burden (odds ratio [OR] for six to eight medications compared with no medications, OR 3.83 [2.20, 6.65]), and increased odds of ADEs associated with primary care visits compared with specialty visits (OR 2.22 [1.70, 2.89]).


Approximately 4.5 million ambulatory visits related to ADEs occur each year, the majority of these in outpatient office practices. A greater focus on ADE prevention and detection is warranted among patients receiving multiple medications in primary care practices.
© Health Research and Educational Trust.

[PubMed - indexed for MEDLINE]
[Available on 2012/10/1]
Adverse drug events in U.S. adult ambulatory... [Health Serv Res. 2011] - PubMed - NCBI

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