INTRODUCTION: People with chronic pain are at increased risk of opioid-misuse. Less is known about the unique risk conferred by each pain management treatment, as treatments are typically implemented together, confounding their independent effects. This study estimated the extent to which pain management treatments were associated with risk of opioid use disorder (OUD) for those with chronic pain, controlling for baseline demographic and clinical confounding variables and holding other pain management treatments at their observed levels.
METHODS: Data were analyzed in 2024 from two chronic pain subgroups within a cohort of non-pregnant Medicaid patients aged 35-64 years, 2016-2019, from 25 states: those with 1) chronic pain and physical disability (CPPD) (N=6,133) or 2) chronic pain without disability (CP) (N=67,438). Nine pain management treatments were considered: prescription opioid i) dose and ii) duration; iii) number of opioid prescribers; opioid co-prescription with iv) benzo- diazepines, v) muscle relaxants, and vi) gabapentinoids; vii) non-opioid pain prescription, viii) physical therapy, and ix) other pain treatment modality. The outcome was OUD risk.
RESULTS: Having opioids co-prescribed with gabapentin or benzodiazepine was statistically significantly associated with a 37-45% increased OUD risk for the CP subgroup. Opioid dose and duration also were significantly associated with increased OUD risk in this subgroup. Physical therapy was significantly associated with an 18% decreased risk of OUD in the CP subgroup.
CONCLUSIONS: Co-prescription of opioids with either gabapentin or benzodiazepines may substantially increase OUD risk. More positively, physical therapy may be a relatively accessible and safe pain management strategy.
Pain management treatments and opioid use disorder risk in Medicaid patients
American Journal of Preventive Medicine [Epub 2024 Jul 16]. doi: 10.1016/j.amepre.2024.07.006.