Year-Long Study Assesses Opioid vs. Non-Opioid Tx for Back, Osteoarthritis Pain
HealthDay News — Opioid treatment is not superior to non-opioid treatment for improving pain-related function over 12 months, according to a study published in the March 6 issue of the Journal of the American Medical Association.
Erin E. Krebs, MD, MPH, from the Minneapolis Veterans Affairs Health Care System, and colleagues compared opioid versus non-opioid medications over 12 months in a randomized trial. Two hundred forty patients with moderate-to-severe chronic back pain or hip or knee osteoarthritis pain despite analgesic use were randomized; 234 completed the trial.
The researchers observed no significant difference between the groups in pain-related function over 12 months (overall P=0.58); the mean 12-month Brief Pain Inventory (BPI) interference was 3.4 and 3.3 for the opioid and non-opioid groups, respectively (difference, 0.1; 95% confidence interval, −0.5 to 0.7). Over 12 months, pain intensity was significantly better in the non-opioid group (overall P=0.03); the mean BPI severity was 4.0 and 3.5 for the opioid and non-opioid groups, respectively (difference, 0.5; 95% confidence interval, 0.0 to 1.0). Over 12 months, adverse medication-related symptoms were significantly more common in the opioid group (overall P=0.03).
"Results do not support initiation of opioid therapy for moderate-to-severe chronic back pain or hip or knee osteoarthritis pain," the authors write.
One author disclosed financial ties to the pharmaceutical industry.