Implications of Race Adjustment in Lung-Function Equations.

BACKGROUND: Adjustment for race is discouraged in lung-function testing, but the implications of adopting race-neutral equations have not been comprehensively quantified. METHODS: We obtained longitudinal data from 369,077 participants in the National Health and Nutrition Examination Survey, U.K. Biobank, the Multi-Ethnic Study of Atherosclerosis, and the Organ Procurement and Transplantation Network. Using these data, we compared the race-based 2012 Global Lung Function Initiative (GLI-2012) equations with race-neutral equations introduced in 2022 (GLI-Global). Evaluated outcomes included national projections of clinical, occupational, and financial reclassifications; individual lung-allocation scores for transplantation priority; and concordance statistics (C statistics) for clinical prediction tasks. RESULTS: Among the 249 million persons in the United States between 6 and 79 years of age who are able to produce high-quality spirometric results, the use of GLI-Global equations may reclassify ventilatory impairment for 12.5 million persons, medical impairment ratings for 8.16 million, occupational eligibility for 2.28 million, grading of chronic obstructive pulmonary disease for 2.05 million, and military disability compensation for 413,000. These potential changes differed according to race; for example, classifications of nonobstructive ventilatory impairment may change dramatically, increasing 141% (95% confidence interval [CI], 113 to 169) among Black persons and decreasing 69% (95% CI, 63 to 74) among White persons. Annual disability payments may increase by more than $1 billion among Black veterans and decrease by $0.5 billion among White veterans. GLI-2012 and GLI-Global equations had similar discriminative accuracy with regard to respiratory symptoms, health care utilization, new-onset disease, death from any cause, death related to respiratory disease, and death among persons on a transplant waiting list, with differences in C statistics ranging from -0.008 to 0.011. CONCLUSIONS: The use of race-based and race-neutral equations generated similarly accurate predictions of respiratory outcomes but assigned different disease classifications, occupational eligibility, and disability compensation for millions of persons, with effects diverging according to race. (Funded by the National Heart Lung and Blood Institute and the National Institute of Environmental Health Sciences.).

Contribution of mental ill health during military service to postservice benefit claims in the UK.

OBJECTIVES: While most UK military personnel transition successfully into civilian life, some experience unemployment and disability, which may be partly attributable to in-service factors. This study aims to determine the degree to which in-service mental health problems impact on postservice benefit claims. METHODS: Using data from a cohort of 5598 recent leavers from regular service in the UK Armed Forces linked with data from the Department for Work and Pensions, we assessed associations between in-service mental health and postservice benefit claims, and the population attributable fraction (PAF) of benefit claims related to in-service mental health. An analysis with postservice mental ill health as mediator was performed to determine the degree to which the observed effects were a consequence of persistent illness, as opposed to remitted. RESULTS: Mental illness occurring in-service predicted both unemployment and disability claims, partly mediated by postservice health (23%-52% total effects mediated), but alcohol misuse did not. Common mental disorder (CMD) (PAF 0.07, 95% CI: 0.02 to 0.11) and probable post-traumatic stress disorder (PTSD) (PAF 0.05, 95% CI 0.01 to 0.09) contributed to unemployment claims. Probable PTSD was the largest contributor to disability claims (PAF 0.25, 95% CI 0.13 to 0.36), with a smaller contribution from CMD (PAF 0.16, 95% CI 0.03 to 0.27). CONCLUSIONS: In-service mental ill health gives rise to benefit claims. These effects are only partly mediated by postservice mental health, implying that in-service (or pre-service) mental issues have carry-over effects into civilian life even if remitted. Better prevention and treatment of in-service PTSD symptoms may well reduce postservice disability claims.

Reversals in initially denied Department of Veterans Affairs' PTSD disability claims after 17 years: a cohort study of gender differences.

BACKGROUND: In 2011, the Department of Veterans Affairs (VA) strengthened its disability claims processes for military sexual trauma, hoping to reduce gender differences in initial posttraumatic stress disorder (PTSD) disability awards. These process improvements should also have helped women reverse previously denied claims and, potentially, diminished gender discrepancies in appealed claims' outcomes. Our objectives were to examine gender differences in reversals of denied PTSD claims' outcomes after 2011, determine whether disability awards (also known as "service connection") for other disorders offset any PTSD gender discrepancy, and identify mediating confounders that could explain any persisting discrepancy. METHODS: From a nationally representative cohort created in 1998, we examined service connection outcomes in 253 men and 663 women whose initial PTSD claims were denied. The primary outcome was PTSD service connection as of August 24, 2016. Secondary outcomes were service connection for any disorder and total disability rating. The total disability rating determines the generosity of Veterans' benefits. RESULTS: 51.4% of men and 31.3% of women were service connected for PTSD by study's end (p < 0.001). At inception, 54.2% of men and 63.2% of women had any service connection-i.e., service connection for disorders other than PTSD (p = 0.01) and similar total disability ratings (p = 0.50). However, by study's end, more men than women had any service connection (88.5% versus 83.5%, p = 0.05), and men's mean total disability rating was substantially greater than women's (77.1 ± 26.2 versus 66.8 ± 30.7, p < 0.001). History of military sexual assault had the largest effect modification on men's versus women's odds of PTSD service connection. CONCLUSION: Even after 2011, cohort men were more likely than the women to reverse initially denied PTSD claims, and military sexual assault history accounted for much of this difference. Service connection for other disorders initially offset women's lower rate of PTSD service connection, but, ultimately, men's total disability ratings exceeded women's. Gender discrepancies in service connection should be monitored beyond the initial claims period.

Increased risk of attempted suicide in Australian veterans is associated with total and permanent incapacitation, unemployment and posttraumatic stress disorder severity.

BACKGROUND: Military veterans have higher rates of suicidality and completed suicides compared to the general population. Previous research has demonstrated suicidal behaviour is higher in US combat veterans who are younger, suffer from posttraumatic stress disorder, depression and anxiety and score lower on measures of health. However, research on predictors of suicide for Australian veterans is limited. The aim of this study was to identify significant demographic and psychological differences between veterans with posttraumatic stress disorder who had attempted suicide and those with posttraumatic stress disorder who had not, as well as determine predictors of suicide attempts within an Australian cohort. METHODS: A retrospective analysis was conducted on 229 ex-service personnel diagnosed with posttraumatic stress disorder who had attended a Military Service Trauma Recovery Day Program as outpatients at Toowong Private Hospital from 2007 to 2014. Patients completed a battery of mental health self-report questionnaires assessing symptoms of posttraumatic stress disorder, alcohol use, anger, depression, anxiety and quality of life. Demographic information and self-reported history of suicide attempts were also recorded. RESULTS: Results indicated the average age was significantly lower, and the rates of posttraumatic stress disorder, anger, anxiety and depression symptoms were significantly higher in those veterans with history of a suicide attempt. Multivariate logistic regression analyses indicated posttraumatic stress disorder symptom severity, unemployment or total and permanent incapacity pension status significantly predicted suicide attempt history. CONCLUSION: Among a cohort of Australian veterans with posttraumatic stress disorder, psychopathology severity, unemployment and total and permanent incapacity status are significantly associated with suicidality. This study highlights the importance of early identification of posttraumatic stress disorder and psychopathology, therapeutic and social engagement, and prioritisation of tangible employment options or meaningful and goal-directed activities for veterans deemed unable to work.

Understanding the impact of mild traumatic brain injury on veteran service-connected disability: results from Chronic Effects of Neurotrauma Consortium.

OBJECTIVES: Disability evaluation is complex. The association between mild traumatic brain injury (mTBI) history and VA service-connected disability (SCD) ratings can have implications for disability processes in the civilian population. We examined the association of VA SCD ratings with lifetime mTBI exposure in three models: any mTBI, total mTBI number, and blast-related mTBI. METHODS: Participants were 492 Operation Enduring Freedom/Operation Iraqi Freedom/Operation New Dawn veterans from four US VA Medical Centers enrolled in the Chronic Effects of Neurotrauma Consortium study between January 2015 and August 2016. Analyses entailed standard covariate-adjusted linear regression models, accounting for demographic, military, and health-related confounders and covariates. RESULTS: Unadjusted and adjusted results indicated lifetime mTBI was significantly associated with increased SCD, with the largest effect observed for blast-related mTBI. Every unit increase in mTBI was associated with an increase in 3.6 points of percent SCD. However, hazardous alcohol use was associated with lower SCD. CONCLUSIONS: mTBI, especially blast related, is associated with higher VA SCD ratings, with each additional mTBI increasing percent SCD. The association of hazardous alcohol use with SCD should be investigated as it may impact veteran health services access and health outcomes. These findings have implications for civilian disability processes.

Schedule for Rating Disabilities: the Organs of Special Sense and Schedule of Ratings--Eye. Final rule.

The Department of Veterans Affairs (VA) is revising the portion of the VA Schedule for Rating Disabilities (VASRD or rating schedule) that addresses the organs of special sense and schedule of ratings--eye. The final rule incorporates medical advances that have occurred since the last review, updates current medical terminology, and provides clearer evaluation criteria.

Schedule for Rating Disabilities; Gynecological Conditions and Disorders of the Breast. Final rule.

This document amends the Department of Veterans Affairs (VA) Schedule for Rating Disabilities (VASRD) by revising the portion of the rating schedule that addresses gynecological conditions and disorders of the breast. The effect of this action is to ensure that this portion of the rating schedule uses current medical terminology and to provide detailed and updated criteria for evaluation of gynecological conditions and disorders of the breast.

Persistent Serious Mental Illness Among Former Applicants for VA PTSD Disability Benefits and Long-Term Outcomes: Symptoms, Functioning, and Employment.

Millions of U.S. veterans have returned from military service with posttraumatic stress disorder (PTSD), for which a substantial number receive U.S. Department of Veterans Affairs (VA) disability benefits. Although PTSD is treatable, comorbid serious mental illness (defined here as schizophrenia, schizoaffective disorder, and bipolar spectrum disorders) could complicate these veterans' recovery. Using VA administrative data, we examined the burden of persistent serious mental illness in a nationally representative cohort of 1,067 men and 1,513 women who applied for VA PTSD disability benefits between 1994 and 1998 and served during or after the Vietnam conflict. Self-reported outcomes were restricted to the 713 men and 1,015 women who returned surveys at each of 3 collection points. More than 10.0% of men and 20.0% of women had persistent serious mental illness; of these, more than 80.0% also had persistent PTSD. On repeated measures modeling, those with persistent serious mental illness consistently reported more severe PTSD symptoms and poorer functioning in comparison to other participants (ps < .001); their employment rate did not exceed 21.0%. Interactions between persistent serious mental illness and PTSD were significant only for employment (p = .002). Persistent serious mental illness in this population was almost 2 to 19 times higher than in the general U.S. POPULATION: The implications of these findings are discussed.

Comparability of health service use by veterans with multisymptom illness and those with chronic diseases.

OBJECTIVE: To compare health service utilization and disability claims among military personnel with multisymptom illness (MSI) (but no chronic diseases), those with chronic disease(s) and those without MSI or chronic diseases. MSI is also known as Gulf War illness. DESIGN: Cohort study. SETTING: Australia. PARTICIPANTS: In total, 1288 participants of a Gulf War veterans' study conducted in 2000-2003 (Wave-1) were followed up in 2011-2012 (Wave-2), aged on average 40 years. About 160 had MSI, 217 had chronic disease(s) and 911 had neither chronic disease(s) nor MSI. METHODS: At Wave-2, the cohort was linked to the national Medicare and Department of Veterans' Affairs (DVA) databases to obtain health service utilization and disability claims data recorded between 2001 and 2012. RESULTS: The likelihood of visiting a general practitioner (GP) (risk ratio [RR] = 1.04, 95% confidence interval [CI] = 0.92, 1.19) or visiting a specialist medical doctor (RR = 0.83; 95% CI = 0.54, 1.28) or hospitalizations (RR = 0.89; 95% CI = 0.61, 1.29) or) in the 12 months preceding Wave-2 or successfully claiming for DVA disability compensation (RR = 1.13; 95% CI = 0.86, 1.47) was similar for personnel with MSI and those with chronic disease(s). However, GP consultations, hospitalizations, specialist doctor consultations and disability claims were significantly higher among those with MSI than those without MSI/chronic diseases. CONCLUSIONS: Health service use and disability claims by personnel with MSI were comparable to those with chronic disease(s), but were in excess of those without MSI/chronic diseases. Hence recognition of the high health service use by personnel with MSI is important to ensure adequate provision of health services.

Extension of the Presumptive Period for Compensation for Gulf War Veterans. Final rule.

The Department of Veterans Affairs (VA) is issuing this final rule to affirm its adjudication regulations regarding compensation for disabilities resulting from undiagnosed illnesses suffered by veterans who served in the Persian Gulf War. This amendment is necessary to extend the period during which disabilities associated with undiagnosed illnesses and medically unexplained chronic multi-symptom illnesses must become manifest in order for a Veteran to be eligible for compensation. The intended effect of this amendment is to provide consistency in VA adjudication policy, preserve certain rights afforded to Persian Gulf War (GW) veterans, and ensure fairness for current and future GW veterans.

Schedule for Rating Disabilities; the Endocrine System. Final rule.

This document amends the Department of Veterans Affairs (VA) Schedule for Rating Disabilities (VASRD) by revising the portion of the Schedule that addresses endocrine conditions and disorders of the endocrine system. The effect of this action is to ensure that the VASRD uses current medical terminology and to provide detailed and updated criteria for evaluation of endocrine disorders.

Schedule for Rating Disabilities; Dental and Oral Conditions. Final rule.

This document amends the Department of Veterans Affairs (VA) Schedule for Rating Disabilities by revising the portion of the schedule that addresses dental and oral conditions. The effect of this action is to ensure that the rating schedule uses current medical terminology and to provide detailed and updated criteria for evaluation of dental and oral conditions for disability rating purposes.

Diseases Associated With Exposure to Contaminants in the Water Supply at Camp Lejeune. Final rule.

The Department of Veterans Affairs (VA) amends its adjudication regulations regarding presumptive service connection, adding certain diseases associated with contaminants present in the base water supply at U.S. Marine Corps Base Camp Lejeune (Camp Lejeune), North Carolina, from August 1, 1953, to December 31, 1987. This final rule establishes that veterans, former reservists, and former National Guard members, who served at Camp Lejeune for no less than 30 days (consecutive or nonconsecutive) during this period, and who have been diagnosed with any of eight associated diseases, are presumed to have incurred or aggravated the disease in service for purposes of entitlement to VA benefits. In addition, this final rule establishes a presumption that these individuals were disabled during the relevant period of service for purposes of establishing active military service for benefits purposes. Under this presumption, affected former reservists and National Guard members have veteran status for purposes of entitlement to some VA benefits. This amendment implements a decision by the Secretary of Veterans Affairs that service connection on a presumptive basis is warranted for claimants who served at Camp Lejeune during the relevant period and for the requisite amount of time and later develop certain diseases.

Does Coordinated, Multidisciplinary Treatment Limit Medical Disability and Attrition Related to Spine Conditions in the US Navy?

BACKGROUND: Musculoskeletal conditions account for the largest proportion of cases resulting in early separation from the US Navy. This study evaluates the impact of the Spine Team, a multidisciplinary care group that included physicians, physical therapists, and a clinical psychologist, for the treatment of active-duty service members with work-disabling, nonspecific low back pain at the Naval Medical Center, Portsmouth, VA, USA. We compared the impact of the introduction of the Spine Team in limiting disability and attrition from work-disabling spine conditions with the experience of the Naval Medical Center, San Diego, CA, USA, where there is no comparable spine team. QUESTIONS/PURPOSES: Is a multidisciplinary spine team effective in limiting disability and attrition related to work-disabling spine conditions as compared with the current standard of care for US military active-duty service members? METHODS: This is a retrospective, pre-/post-study with a separate, concurrent control group using administratively collected data from two large military medical centers during the period 2007 to 2009. In this study, disability is expressed as the proportion of active-duty service members seeking treatment for a work-disabling spine condition that results in the assignment of a first-career limited-duty status. Attrition is expressed as the proportion of individuals assigned a first-career limited-duty status for a work-disabling spine condition who were referred to a Physical Evaluation Board. We analyzed 667 individuals assigned a first-career limited-duty for a work-disabling spine condition between 2007 and 2009 who received care at the Naval Medical Center Portsmouth or Naval Medical Center San Diego. RESULTS: Rates of first-career limited-duty assignments for spine conditions decreased from 2007 to 2009 at both sites, but limited-duty rates decreased to a greater extent at the intervention site (Naval Medical Center Portsmouth; from 8.5 per 100 spine cases in 2007 to 5.1 per 100 cases in 2009, p < 0.001) as compared with the control site (Naval Medical Center San Diego; 16.0 per 100 spine cases in 2007 and 14.1 per 100 cases in 2009, p = 0.38) after the Spine Team was implemented in 2008. The risk of disability was lower at Naval Medical Center Portsmouth as compared with Naval Medical Center San Diego for each of the 3 years studied (in 2007, the relative risk was 0.53 [95% confidence limit {CL}, 0.42-0.68; p < 0.001]) indicating a protective effect of Naval Medical Center Portsmouth in limiting disability (in 2008, it was 0.58 [95% CL, 0.45-0.73; p < 0.001] and in 2009 0.34 [95% CL, 0.27-0.47; p < 0.001]); the relative risk improved in 2009 after the introduction of the Spine Team at Naval Medical Center Portsmouth. There were no differences observed in rates of attrition from the period before the introduction of the Spine Team to after at Naval Medical Center Portsmouth, and no overall differences could be statistically detected between the two sites. CONCLUSIONS: This study provides suggestive evidence that a multi-disciplinary Spine Team may be effective in limiting disability. No conclusion can be drawn about the Spine Team's effectiveness in limiting attrition. Additional study is warranted to examine the effect of the timing of the introduction of multidisciplinary care for work-disabling spine conditions. LEVEL OF EVIDENCE: Level III, therapeutic study.

Trends in the epidemiology of disability related to traumatic brain injury in the US Army and Marine Corps: 2005 to 2010.

BACKGROUND: Traumatic brain injury (TBI) has been recognized as a major public health issue for several decades. Despite technological advancements in protective equipment and medical care available during recent military conflicts, TBI is the most common neurological condition among Soldiers and Marines evaluated for discharge from service. This study describes the demographic, service-related, and disability characteristics of Soldiers and Marines referred for combat-related TBI disability evaluation. METHODS: Cross-sectional analysis of Soldiers and Marines evaluated for combat-related disability between October 1, 2004 and September 30, 2010 was performed. Traumatic brain injury cases were identified using the Veterans Affairs Schedule for Rating Disabilities code for TBI and compared with other combat-related disabilities. RESULTS: Combat-related TBI disability rates have significantly increased in both the Army and the Marine Corps since 2005. Significantly more unfitting conditions are present on average in combat-related TBI cases than in other combat-related disability cases. Combat-related TBI disability cases are more likely to be medically retired than other types of combat-related disability. CONCLUSIONS: Because veterans with combat-related TBI disabilities are likely to require chronic care for TBI-associated medical conditions, disability evaluation policy and programs must ensure that combat-related TBI disabilities are accurately identified and compensated, and the potential long-term care needs are addressed.

Standard claims and appeals forms. Final rule.

The Department of Veterans Affairs (VA) amends its adjudication regulations and the appeals regulations and rules of practice of the Board of Veterans' Appeals (Board) to require that all claims governed by VA's adjudication regulations be filed on standard forms prescribed by the Secretary, regardless of the type of claim or posture in which the claim arises. This rulemaking also eliminates the constructive receipt of VA reports of hospitalization or examination and other medical records as informal claims for increase or to reopen while retaining the retroactive effective date assignment for awards for claims for increase which are filed on a standard form within 1 year of such hospitalization, examination, or treatment. This final rule also implements the concept of an intent to file a claim for benefits, which operates similarly to the current informal claim process, but requires that the submission establishing a claimant's effective date of benefits must be received in one of three specified formats. Finally, these amendments will provide that VA will accept an expression of dissatisfaction or disagreement with an adjudicative determination by the agency of original jurisdiction(AOJ) as a Notice of Disagreement (NOD) only if it is submitted on a standardized form provided by VA for the purpose of appealing the decision, in cases where such a form is provided. Although a standardized NOD form will only initially be provided in connection with decisions on compensation claims, VA may require a standard NOD form for any type of claim for VA benefits if, in the future, it develops and provides a standardized NOD form for a particular benefit. The purpose of these amendments is to improve the quality and timeliness of the processing of veterans' claims for benefits by standardizing the claims and appeals processes through the use of forms.

Examination of Veterans Affairs disability compensation as a disincentive for employment in a population-based sample of Veterans under age 65.

PURPOSE: Concerns that disability benefits may create disincentives for employment may be especially relevant for young American military veterans, particularly veterans of the recent wars in Iraq and Afghanistan who are facing a current economic recession and turning in large numbers to the Department of Veterans Affairs (VA) for disability compensation. This study describes the rate of employment and VA disability compensation among a nationally representative sample of veterans under the age of 65 and examines the association between levels of VA disability compensation and employment, adjusting for sociodemographics and health status. METHODS: Data on a total of 4,787 veterans from the 2010 National Survey of Veterans were analyzed using multinomial logistic regressions to compare employed veterans with two groups that were not employed. RESULTS: Two-thirds of veterans under the age of 65 were employed, although only 36 % of veterans with a VA service-connected disability rating of 50 % or higher were employed. Veterans who received no VA disability compensation or who were service-connected 50 % or more were more likely to be unemployed and not looking for employment than veterans who were not service-connected or were service-connected less than 50 %, suggesting high but not all levels of VA disability compensation create disincentives for employment. Results were similar when analyses were limited to veterans who served in Iraq and Afghanistan. CONCLUSIONS: Education and vocational rehabilitation interventions, as well as economic work incentives, may be needed to maximize employment among veterans with disabilities.

Proposed Changes to the Department of Veterans Affairs Disability Rating Rubric for Mental Disorders.

OBJECTIVE: The U.S. Department of Veterans Affairs (VA) provides disability benefits for general medical and mental health conditions related to military service. Despite advances in conceptualization, assessment, and diagnosis of mental disorders, the current rating rubric used to determine the award amounts received by veterans with posttraumatic stress disorder and other mental disorders has not been substantively revised since 1996. The VA recently proposed sweeping changes to the rating rubric for mental disorders, shifting the focus from a symptom-based algorithm to one based on functional impairment and bringing the rubric more in line with existing disability systems and guidelines. METHODS: The authors examined the VA's current symptom-based rating rubric and reviewed and analyzed the proposed changes, including a comparison with other rating systems used for mental disorders. Research on the relationship between psychiatric symptoms and functional impairment is also discussed. RESULTS: Bringing examination procedures in line with the new function-based rating schedule will require significant changes to current standard practice for both examiners and Veterans Benefits Administration raters. The new rubric requires more specific definitions, anchors, and operationalization of the domains of function in the rating schedule to improve reliability and validity. CONCLUSIONS: The new system reflects an overdue shift away from a symptom-based formula toward real-world functioning. Concept study data suggest that the system may increase ratings for veterans awarded compensation, but the actual impact remains unknown. The authors discuss the implications of the new method for disability determination and offer suggestions for maximizing effective and fair implementation of the new rubric.

Compensation and treatment: disability benefits and outcomes of U.S. veterans receiving residential PTSD treatment.

The U.S. Department of Veterans Affairs (VA) provides specialized intensive posttraumatic stress disorder (PTSD) programs to treat trauma-related symptoms in addition to providing service-connected disability to compensate veterans for injury sustained while serving in the military. Given the percentage of veterans who are receiving treatment for PTSD, in addition to seeking compensation for PTSD, a debate has emerged about the impact of compensation on symptom recovery. This study examined the associations among status of compensation, treatment expectations, military cohort, length of stay, and outcomes for 776 veterans who were enrolled in 5 VA residential PTSD programs between the years of 2005 and 2010. Mixed model longitudinal analyses, with age, gender, and baseline symptoms nested within treatment site in the model, found that treatment expectations were modestly predictive of treatment outcomes. Veterans seeking increased compensation reported marginally lower treatment expectations (d = .008), and did not experience poorer outcomes compared to veterans not seeking increased compensation with the effect of baseline symptoms partialled out. Veterans from the era of the Iraq and Afghanistan conflicts reported lower treatment expectations (d = .020) and slightly higher symptoms at intake (d = .021), but had outcomes at discharge equivalent to veterans from other eras with baseline symptoms partialled out. These findings help further inform the debate concerning disability benefits and symptom changes across time.

Use of outpatient care in VA and Medicare among disability-eligible and age-eligible veteran patients.

BACKGROUND: More than half of veterans who use Veterans Health Administration (VA) care are also eligible for Medicare via disability or age, but no prior studies have examined variation in use of outpatient services by Medicare-eligible veterans across health system, type of care or time. OBJECTIVES: To examine differences in use of VA and Medicare outpatient services by disability-eligible or age-eligible veterans among veterans who used VA primary care services and were also eligible for Medicare. METHODS: A retrospective cohort study of 4,704 disability- and 10,816 age-eligible veterans who used VA primary care services in fiscal year (FY) 2000. We tracked their outpatient utilization from FY2001 to FY2004 using VA administrative and Medicare claims data. We examined utilization differences for primary care, specialty care, and mental health outpatient visits using generalized estimating equations. RESULTS: Among Medicare-eligible veterans who used VA primary care, disability-eligible veterans had more VA primary care visits (p < 0.001) and more VA specialty care visits (p < 0.001) than age-eligible veterans. They were more likely to have mental health visits in VA (p < 0.01) and Medicare-reimbursed visits (p < 0.01). Disability-eligible veterans also had more total (VA+Medicare) visits for primary care (p < 0.01) and specialty care (p < 0.01), controlling for patient characteristics. CONCLUSIONS: Greater use of primary care and specialty care visits by disability-eligible veterans is most likely related to greater health needs not captured by the patient characteristics we employed and eligibility for VA care at no cost. Outpatient care patterns of disability-eligible veterans may foreshadow care patterns of veterans returning from Afghanistan and Iraq wars, who are entering the system in growing numbers. This study provides an important baseline for future research assessing utilizations among returning veterans who use both VA and Medicare systems. Establishing effective care coordination protocols between VA and Medicare providers can help ensure efficient use of taxpayer resources and high quality care for disabled veterans.