Journal of Pain Research (Aug 2021)
Cross-Validation of the Foundation Pain Index with PROMIS-29 in Chronic Pain Patients
Abstract
Jason E Pope,1 Michael A Fishman,2 Joshua A Gunn,3 Bradley M Cotten,3 Melissa M Hill,3 Timothy R Deer4 1Evolve Restorative Center, Santa Rosa, CA, USA; 2Center for Interventional Pain and Spine, Lancaster, PA, USA; 3Ethos Research and Development, LLC, Newport, KY, USA; 4The Spine and Nerve Center of the Virginias, Charleston, WV, USACorrespondence: Jason E PopeEvolve Restorative Center, Santa Rosa, CA, USATel +1844 527-7369Email [email protected]: Discovery and validation of pragmatic biomarkers represent significant advancements in the field of pain management. Evaluating relationships between objective biomarkers and patient-reported outcomes (PROs) is an effective way to gain mechanistic insight into the potential role of biochemistry in chronic pain. The aim of this study was to validate the Foundation Pain Index (FPI) by evaluating associations between deranged biochemical function and PROMIS-29 domains in individuals living with chronic pain.Patients and Methods: PROMIS-29 scores and FPI test results were obtained from 298 patients with chronic pain in this retrospective, observational study. Statistical analysis was performed using clinical test data to evaluate relationships between deranged biochemical function and quality of life measures across 8 universal domains.Results: FPI scores significantly associated with multiple PROMIS-29 domains including physical function, impact score, fatigue, pain interference, and depression (P < 0.05). Moreover, specific analytes that comprise the FPI significantly correlated with PROMIS-29 domains, including 5-hydroxyindolacetic acid (pain interference, physical function, and pain impact scores), hydroxymethylglutarate (physical function), homocysteine (pain impact scores), kynurenic acid (pain interference and physical function), and quinolinic acid (physical function) (P < 0.05).Conclusion: Cross-validation of the FPI with PROMIS-29 domains further supports the role of deranged biochemical function in the etiology of chronic pain. Objective identification of atypical biochemical function and subsequent correction holds tremendous promise for the non-opioid management of pain. Continued research efforts will aim to determine the impact of biochemical optimization in pre-surgical periods and post-surgical outcomes in patients with chronic pain.Keywords: biomarker, pain, oxidative stress, neurotransmitter, micronutrient deficiency, kynurenine pathway
