Physical health burden of PTSD, depression, and their comorbidity in the US veteran population: Morbidity, functioning, and disability

Objective: Although it is well-established that posttraumatic stress disorder (PTSD) and major depressive disorder (MDD) are associated with physical health difficulties among U.S. veterans, the incremental burden of having both disorders relative to either one alone remains largely unknown. The goal of this study was to provide the first population-based characterization of the burden of medical illness associated with PTSD, MDD, and their comorbidity among U.S. veterans. Methods: Data were from National Health and Resilience in Veterans Study, a nationally representative survey of U.S. veterans (n = 2732). Analyses (a) examined the magnitude of medical comorbidity and disability associated with PTSD, MDD, and co-occurring PTSD/MDD; and (b) compared physical functioning by PTSD/MDD status. Results: After adjusting for sociodemographic characteristics and substance use disorders, veterans with co-morbid PTSD/MDD were more likely to be diagnosed with heart disease, migraine, fibromyalgia, and rheumatoid arthritis compared to those with MDD-only. Conversely, they were at greater odds of being diagnosed with hypercholesterolemia and hypertension relative to those with PTSD-only. Comorbid PTSD/MDD status was associated with approximately three times greater odds of disability compared to MDD alone. Veterans with co-occurring PTSD/MDD and PTSD-only exhibited worse physical functioning than those with MDD-only. Conclusion: Findings indicate that veterans with co-occurring PTSD/MDD represent a high-risk group for cardiovascular disease and other health problems, and therefore deserve careful attention from healthcare systems. Further research is needed to investigate mechanisms underlying associations between PTSD/MDD and physical health morbidities, as well as whether treatment of PTSD/MDD can reduce risk for comorbid medical conditions.