Opioid utilization patterns among patients with cancer and noncancer pain.

Abstract

194 Background: Opioids are used to manage moderate to severe pain in patients with cancer and non-cancer pain. Limited data exist comparing opioid utilization patterns between these two patient populations. Methods: This retrospective, commercial administrative claims database analysis (HealthCore Integrated Research Environment) investigated opioid use patterns, including opioid dose escalation, in adult patients with cancer-related (CP) and non-cancer-related pain (NCP). Adults (age ≥18 years) with at least one pharmacy claim for an opioid between July 1, 2006, and September 30, 2014, were identified (index date). Patients selected for analysis had to have continuous plan eligibility for 6 months pre- and 12 months post-index date and opioid use for at least 4 weeks. Patients with opioid use related to cancer pain were identified by a medical claim for a cancer diagnosis coded within 30 days prior to the index opioid date. Results: A total of 9,209 patients with CP and 409,703 patients with NCP were analyzed. Patients with CP were older than patients with NCP (mean [SD]: 62.6 [12.9] yrs vs. 49.3 [15.3] yrs); other demographics were similar between cohorts. The most common cancer diagnoses were breast, lung, and prostate. Hydrocodone was the most common opioid prescribed for both cohorts. Total mean (SD) days of opioid therapy were 167.1 (341.8) for CP and 196.6 (421.1) for NCP, with similar rates of opioid use for ≥1 year (10.6% for CP; 13.6% for NCP). Median index opioid doses were consistent between the cohorts (CP: 51.7 morphine-equivalent units (MEU); NCP: 45.0 MEU). Median post-index (after the first 30 days) opioid doses were also similar (CP: 55.8 MEU; NCP: 45.3 MEU). Post-index opioid dose reductions occurred in approximately one-third of both cohorts. Opioid dose escalations (up to dose doubling) occurred in 31.8% of CP and 28.3% of NCP patients. More patients died during the follow-up period in the CP cohort (24.1%) compared with the NCP cohort (0.02%). Conclusions: The use of opioids bears many similarities between patients with cancer pain and non-cancer pain, including clinically similar rates of chronic opioid utilization and dose escalation. This study was supported by AstraZeneca.