Association Between Facility-Level Utilization of Non-pharmacologic Chronic Pain Treatment and Subsequent Initiation of Long-Term Opioid Therapy
Expert guidelines recommend non-pharmacologic treatments and non-opioid medications for chronic pain and recommend against initiating long-term opioid therapy (LTOT).
We examined whether veterans with incident chronic pain receiving care at facilities with greater utilization of non-pharmacologic treatments and non-opioid medications are less likely to initiate LTOT.
Retrospective cohort study
Veterans receiving primary care from a Veterans Health Administration facility with incident chronic pain between 1/1/2010 and 12/31/2015 based on either of 2 criteria: (1) persistent moderate-to-severe patient-reported pain and (2) diagnoses “likely to represent” chronic pain.
The independent variable was facility-level utilization of pain-related treatment modalities (non-pharmacologic, non-opioid medications, LTOT) in the prior calendar year. The dependent variable was patient-level initiation of LTOT (≥ 90 days within 365 days) in the subsequent year, adjusting for patient characteristics.
Among 1,094,569 veterans with incident chronic pain from 2010 to 2015, there was wide facility-level variation in utilization of 10 pain-related treatment modalities, including initiation of LTOT (median, 16%; range, 5–32%). Veterans receiving care at facilities with greater utilization of non-pharmacologic treatments were less likely to initiate LTOT in the year following incident chronic pain. Conversely, veterans receiving care at facilities with greater non-opioid and opioid medication utilization were more likely to initiate LTOT; this association was strongest for past year facility-level LTOT initiation (adjusted rate ratio, 2.10; 95% confidence interval, 2.06–2.15, top vs. bottom quartile of facility-level LTOT initiation in prior calendar year).
Facility-level utilization patterns of non-pharmacologic, non-opioid, and opioid treatments for chronic pain are associated with subsequent patient-level initiation of LTOT among veterans with incident chronic pain. Further studies should seek to understand facility-level variation in chronic pain care and to identify facility-level utilization patterns that are associated with improved patient outcomes.
KEY WORDSchronic pain practice variation health care delivery health services research
comlementary and integrative health
physical therapy/occupational therapy
non-steroidal anti-inflammatory drugs
Sample size across all years, N = 858,199
Adjusted rate ratios and 95% confidence intervals for initiation of long-term opioid therapy during year following chronic pain index date. Adjusted estimates generated using a quasi-Poisson general linear model.
Model 1 adjusted for patient age at index date, gender, race/ethnicity, calendar year of index date, rurality of patient residence, pain diagnoses (back pain, neck, and other joint pain), mental health diagnoses (depression, anxiety, post-traumatic stress disorder, bipolar disorder), substance use disorder diagnoses (alcohol use disorder, opioid use disorder, other substance use disorder), Charlson’s comorbidity index, facility rurality, and facility complexity.
Model 2 adjusted for all Model 1 variables plus each of 10 facility-level pain treatment modality variables, categorized as quartiles.
All authors made substantial contributions to conception and design, acquisition of data, or analysis and interpretation of data; drafting the article or revising it critically for important intellectual content; and final approval of the version to be published.
Compliance with ethical standards
This manuscript has not been previously published and is not under consideration in the same or substantially similar form in any other peer-reviewed media. This work will be presented as a poster at the upcoming VA HSR&D/QUERI meeting on July 18–20, 2017, in Washington, DC.
Conflict of interest
The authors declare that they do not have a conflict of interest.
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