Participants
chronic pain
CHRONIC PAIN
In this ancillary mechanistic study, we added a neurophysiological assessment protocol to an ongoing clinical trial (NCT02935621) where EEG outcomes were not proposed as part of the original clinical trial design. This mechanistic study evaluated neurophysiological (EEG and SCL) data from a sample of Veterans with chronic pain receiving LTOT (Baseline demographic and clinical characteristics (Subjects were allowed to enter more than one opioid type. SHAPS, Snaith Hamilton Anhedonia and Pleasure Scale.