Impact of the COVID-19 pandemic on participants in pragmatic clinical trials for chronic pain: implications for trial outcomes and beyond.

Objective: The COVID-19 pandemic had profound effects on society, including those living with chronic pain. This study sought to examine pandemic impacts on individuals enrolled in pragmatic clinical trials focused on nonpharmacological treatments for chronic pain.

Methods: We evaluated responses to a questionnaire on COVID-19 impacts that had been administered to participants (n=2024) during study enrollment in 3 pragmatic clinical trials for chronic pain treatment. All trials were part of the National Institutes of Health (NIH)-Department of Veterans Affairs (VA)-Department of Defense (DOD) Pain Management Collaboratory. COVID-19-related impacts on access to health care, mental health, finances, ability to meet basic needs, and social support were assessed.

Results: Pandemic impacts were found in all domains assessed, including access to health care, mental and emotional health, ability to meet basic needs, finances, and social support. Impacts varied by demographic and clinical characteristics. The participants most negatively impacted by the pandemic were younger, Black or Latino, female, more educated, and unemployed and had screened positive for depression. No impact differences were found with regard to alcohol use disorder screenings or a prior history of COVID-19. Higher levels of pain were associated with worse pandemic impacts, and negative impacts declined over time.

Conclusions: Negative impacts of the pandemic on individuals living with chronic pain cut across aspects of life that are also central to effective pain management, including access to health care, social support, and mental and emotional health, with differential impacts found across key demographic and clinical factors. These findings should yield consideration of pandemic impacts in clinical practice and as moderating effects of treatment outcomes in clinical trials conducted during the pandemic.