Longitudinal Patterns of Multimorbidity in Gulf War Era Veterans With and Without Gulf War Illness

Author:

Thompson Andrew D.1,Petry Sarah E.123,Hauser Elizabeth R.14,Boyle Stephen H.1,Pathak Gita A.56,Upchurch Julie1,Press Ashlyn1,Johnson Melissa G.1,Sims Kellie J.1,Williams Christina D.1,Gifford Elizabeth J.12ORCID

Affiliation:

1. Cooperative Studies Program Epidemiology Center, Durham VA Medical Center, Durham, NC, USA

2. Sanford School of Public Policy, Duke University, Durham, NC, USA

3. Carolina Population Center, University of North Carolina, Chapel Hill, NC, USA

4. Duke Molecular Physiology Institute and Department of Biostatistics and Bioinformatics, Duke University, Durham, NC, USA

5. Division of Human Genetics, Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA

6. Veteran Affairs Connecticut Healthcare System, West Haven, CT, USA

Abstract

Objectives: To examine whether severe Gulf War illness (SGWI) case status was associated with longitudinal multimorbidity patterns. Methods: Participants were users of the Veteran Health Administration Health Care System drawn from the Gulf War Era Cohort and Biorepository ( n = 840). Longitudinal measures of multimorbidity were constructed using (1) electronic health records (Charlson Comorbidity Index; Elixhauser; and Veterans Affairs Frailty Index) from 10/1/1999 to 6/30/2023 and (2) self-reported medical conditions (Deficit Accumulation Index) since the war until the survey date. Accelerated failure time models examined SGWI case status as a predictor of time until threshold level of multimorbidity was reached, adjusted for age and sociodemographic and military characteristics. Results: Models, adjusted for covariates, revealed that (1) relative to the SWGI− group, the SGWI+ group was associated with an accelerated time for reaching each threshold and (2) the relationship between SGWI and each threshold was not moderated by age. Discussion: Findings suggest that veterans with SGWI experienced accelerated aging.

Funder

National Institute on Aging

Congressionally Directed Medical Research Programs

Department of Veteran Affairs, Cooperative Studies Program

Publisher

SAGE Publications

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