• YouDokyoung SophiaDSDepartment Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Palo Alto, California., Jennifer M Hah, Sophie Collins, Maisa S Ziadni, Ben W Domingue, Karon F Cook, and Sean C Mackey.
• Department Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Palo Alto, California.
• Pain Med. 2019 Oct 1; 20 (10): 192519331925-1933.

ObjectiveThe National Institutes of Health's Patient-Reported Outcomes Measurement Information System (PROMIS)® includes an item bank for measuring misuse of prescription pain medication (PROMIS-Rx Misuse). The bank was developed and its validity evaluated in samples of community-dwelling adults and patients in addiction treatment programs. The goal of the current study was to investigate the validity of the item bank among patients with mixed-etiology chronic pain conditions.MethodA consecutive sample of 288 patients who presented for initial medical evaluations at a tertiary pain clinic completed questionnaires using the open-source Collaborative Health Outcomes Information Registry. Participants were predominantly middle-aged (M [SD] = 51.6 [15.5] years), female (62.2%), and white/non-Hispanic (51.7%). Validity was evaluated by estimating the association between PROMIS-Rx Misuse scores and scores on other measures and testing the ability of scores to distinguish among risk factor subgroups expected to have different levels of prescription pain medicine misuse (known groups analyses).ResultsOverall, score associations with other measures were as expected and scores effectively distinguished among patients with and without relevant risk factors.ConclusionThe study results supported the preliminary validity of PROMIS-Rx Misuse item bank scores for the assessment of prescription opioid misuse in patients visiting an outpatient pain clinic.© 2019 American Academy of Pain Medicine. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

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