Materials and methods
EVENTS
The study assessed baseline data collected during a multi-site, randomized clinical trial comparing Problem-Solving Treatment to Health Education among veterans with Gulf War Illness (GWI) [ClinicalTrials.gov Identifier: NCT02161133]. Participants were recruited nationally through letters and flyers as well as various outreach events. Monetary compensation was provided for participation. The study was reviewed by the Veterans Affairs New Jersey Healthcare System Institutional Review Board, Canandaigua VA Medical Center Institutional Review Board, and Edith Nourse Rogers Memorial VA Hospital (now VA Bedford Health Care System) Institutional Review Board (MIRB: 01250). The study was funded by the Veterans Affairs Clinical Sciences Research and Development (VA CSR&D). All participants provided written consent to participate.