• Yngvild Olsen, Gail L Daumit, and Daniel E Ford.
• Division of General Internal Medicine, Department of Medicine, Johns Hopkins University School of Medicine, Bloomberg School of Public Health, Baltimore, Maryland 21287, USA. yolsen@jhmi.edu
• J Pain. 2006 Apr 1;7(4):225-35.

UnlabelledLittle is known about primary care physicians' (PCPs) prescribing of opioids. We describe trends and factors associated with opioid prescribing during PCP visits over the past decade. Using the National Ambulatory Medical Care Survey, we found an opioid prescribed in 2,206 (5%) PCP visits from 1992 to 2001. The prevalence of visits where an opioid was prescribed increased from a low of 41 per 1000 visits in 1992-1993 to a peak of 63 per 1000 in 1998-1999 (P < .0001 for trend) and then stabilized (59 per 1000 in 2000-2001). Several factors increased the odds of receiving an opioid: having Medicaid (odds ratio [OR] 2.09 [95% confidence interval (CI) 1.82-2.40]) or Medicare (OR 2.00 [95% CI 1.68-2.39]); having a visit between 15 and 35 minutes (OR 1.16 [95% CI 1.05-1.27]); and receiving an NSAID (OR 2.27 [95% CI 2.04-2.53]). Patients of hispanic (OR .67 [95% CI .56-.81]) or other race/ethnicity (OR .68 [95% CI .52-.90]), patients in health maintenance organizations (OR .74 [95% CI .66-.84]), and those living in the northeast (OR .60 [95% CI .51-.69]) or midwest (OR .75 [95% CI .66-.85]) had lower odds of receiving an opioid. Substantial variation exists in opioid prescribing by PCPs. Now that pain management standards are advocated, understanding the dynamics of opioid prescribing is necessary.PerspectiveThis study describes a decade-long increase in opioid prescribing by U.S. primary care physicians and identifies important geographic-, racial/ethnic-, and insurance-related differences in who receives these medications. Several underlying factors, including regulatory and legal pressures, attitudes and knowledge of opioids, and publicized opioid-related events, may contribute to these differences.

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