Long-Term Chronic Opioid Therapy Discontinuation Rates from the TROUP Study
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To report chronic opioid therapy discontinuation rates after five years and identify factors associated with discontinuation.
Medical and pharmacy claims records from January 2000 through December 2005 from a national private health network (HealthCore), and Arkansas (AR) Medicaid were used to identify ambulatory adult enrollees who had 90 days of opioids supplied. Recipients were followed until they discontinued opioid prescription fills or disenrolled. Kaplan Meier survival models and Cox proportional hazards models were estimated to identify factors associated with time until opioid discontinuation.
There were 23,419 and 6,848 chronic opioid recipients followed for a mean of 1.9 and 2.3 years in the HealthCore and AR Medicaid samples. Over a maximum follow up of 4.8 years, 67.0% of HealthCore and 64.9% AR Medicaid recipients remained on opioids. Recipients on high daily opioid dose (greater than 120 milligrams morphine equivalent (MED)) were less likely to discontinue than recipients taking lower doses: HealthCore hazard ratio (HR) = 0.66 (95%CI: 0.57–0.76), AR Medicaid HR = 0.66 (95%CI: 0.50–0.82). Recipients with possible opioid misuse were also less likely to discontinue: HealthCore HR = 0.83 (95%CI: 0.78–0.89), AR Medicaid HR = 0.78 (95%CI: 0.67–0.90).
Over half of persons receiving 90 days of continuous opioid therapy remain on opioids years later. Factors most strongly associated with continuation were intermittent prior opioid exposure, daily opioid dose ≥ 120 mg MED, and possible opioid misuse. Since high dose and opioid misuse have been shown to increase the risk of adverse outcomes special caution is warranted when prescribing more than 90 days of opioid therapy in these patients.
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- Long-Term Chronic Opioid Therapy Discontinuation Rates from the TROUP Study
Journal of General Internal Medicine
Volume 26, Issue 12 , pp 1450-1457
- Cover Date
- Print ISSN
- Online ISSN
- Additional Links
- opioid misuse
- Industry Sectors
- Author Affiliations
- 1. College of Pharmacy, Division of Pharmaceutical Evaluation and Policy, University of Arkansas for Medical Sciences, 4301 W. Markham, Slot 522, Little Rock, AR, 72205, USA
- 2. Department of Psychiatry and Behavioral Sciences, Division of Consultation-Liaison Psychiatry, University of Washington, Seattle, WA, USA
- 3. Department of Psychiatry and Behavioral Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, USA
- 4. HealthCore, 800 Delaware Avenue, Fifth Floor, Wilmington, DE, USA