Complex comorbidity clusters in OEF/OIF veterans: the polytrauma clinical triad and beyond.

BACKGROUND: A growing body of research on US Veterans from Afghanistan and Iraq [Operations Enduring and Iraqi Freedom, and Operation New Dawn (OEF/OIF)] has described the polytrauma clinical triad (PCT): traumatic brain injury (TBI), posttraumatic stress disorder (PTSD), and pain. Extant research has not explored comorbidity clusters in this population more broadly, particularly co-occurring chronic diseases. OBJECTIVES: The aim of the study was to identify comorbidity clusters among diagnoses of deployment-specific (TBI, PTSD, pain) and chronic (eg, hypertension, diabetes) conditions, and to examine the association of these clusters with health care utilization and adverse outcomes. RESEARCH DESIGN: This was a retrospective cohort study. SUBJECTS: The cohort comprised OEF/OIF Veterans who received care in the Veterans Health Administration in fiscal years (FY) 2008-2010. MEASURES: We identified comorbidity using validated ICD-9-CM code-based algorithms and FY08-09 data, followed by which we applied latent class analysis to identify the most statistically distinct and clinically meaningful patterns of comorbidity. We examined the association of these clusters with process measures/outcomes using logistic regression to correlate medication use, acute health care utilization, and adverse outcomes in FY10. RESULTS: In this cohort (N=191,797), we found 6 comorbidity clusters. Cluster 1: PCT+Chronic Disease (5%); Cluster 2: PCT (9%); Cluster 3: Mental Health+Substance Abuse (24%); Cluster 4: Sleep, Amputation, Chronic Disease (4%); Cluster 5: Pain, Moderate PTSD (6%); and Cluster 6: Relatively Healthy (53%). Subsequent health care utilization patterns and adverse events were consistent with disease patterns. CONCLUSIONS: These comorbidity clusters extend beyond the PCT and may be used as a foundation to examine coordination/quality of care and outcomes for OEF/OIF Veterans with different patterns of comorbidity.

A Family's Affair: Caring for Veterans with Penetrating Traumatic Brain Injury.

Approximately 1.1 million family members are primary caregivers to post 9/11 veterans. These military caregivers assume a role that requires a long-term commitment that may affect their own health status; however, the impact on health among military caregivers is underestimated and underrepresented. As part of a larger retrospective cohort study that aimed to assess the health-related outcomes of post 9/11 veterans with penetrating traumatic brain injury (pTBI), we examined the health impact of caregiving on caregivers. Caregivers (n = 66) of veterans with pTBI completed a survey that captured the veterans' and their own health-related outcomes. Surveys included veteran and caregiver sociodemographics, caregiver role, tasks, burden, and caregiver-reported measures of veterans' health and quality of life. The participants were spouses (58%) and parents (32%) providing full-time assistance for more than 5 yr (74%). In their caregiver role, they provided assistance with activities of daily living and emotional/social support. Forty-eight percent of these caregivers met the definition of experiencing clinically significant burden. Veterans with pTBI had other comorbidities (e.g., depression, cognitive dysfunction, and anger), which were associated with caregiver burden. The findings further confirm the impact of caregiving on health status of caregivers, specifically when assisting veterans with pTBI.