non-Hispanic White Veterans Research Articles

Addressing geographic confounding through spatial propensity scores: a study of racial disparities in diabetes.

Motivated by a study exploring differences in glycemic control between non-Hispanic black and non-Hispanic white veterans with type 2 diabetes, we aim to address a type of confounding that arises in spatially referenced observational studies. Specifically, we develop a spatial doubly robust propensity score estimator to reduce bias associated with geographic confounding, which occurs when measured or unmeasured confounding factors vary by geographic location, leading to imbalanced group comparisons. We augment the doubly robust estimator with spatial random effects, which are assigned conditionally autoregressive priors to improve inferences by borrowing information across neighboring geographic regions. Through a series of simulations, we show that ignoring spatial variation results in increased absolute bias and mean squared error, while the spatial doubly robust estimator performs well under various levels of spatial heterogeneity and moderate sample sizes. In the motivating application, we construct three global estimates of the risk difference between race groups: an unadjusted estimate, a doubly robust estimate that adjusts only for patient-level information, and a hierarchical spatial doubly robust estimate. Results indicate a gradual reduction in the risk difference at each stage, with the inclusion of spatial random effects providing a 20% reduction compared to an estimate that ignores spatial heterogeneity. Smoothed maps indicate poor glycemic control across Alabama and southern Georgia, areas comprising the so-called "stroke belt." These results suggest the need for community-specific interventions to target diabetes in geographic areas of greatest need.

Racial/Ethnic Disparities in VA Services Utilization as a Partial Pathway to Mortality Differentials Among Veterans Diagnosed With TBI

Objective:Primary: To examine Veterans Administration (VA) utilization and other potential mediators between racial/ethnic differentials and mortality in veterans diagnosed with traumatic brain injury (TBI).Design:A national cohort of veterans clinically diagnosed with TBI in 2006 was followed from January 1, 2006 through December 31, 2009 or until date of death. Utilization was tracked for 12 months. Differences in survival and potential mediators by race were examined via K-Wallis and chi-square tests. Potential mediation of utilization in the association between mortality and race/ethnicity was studied by fitting Cox models with and without adjustment for demographics and co-morbidities. Poisson regression was used to study the association of race/ethnicity with utilization of specialty services potentially important in the management of TBI.Setting:United States (US) Veterans Administration (VA) Hospitals and Clinics.Participants:14, 690 US veterans clinically diagnosed with TBI in 2006.Interventions:Not Applicable. The study is a secondary data analysis.Main Outcome Measures:Mortality, Utilization.Results:Hispanic veterans were found to have significantly higher unadjusted mortality (6.69%) than Non-Hispanic White veterans (2.93%). Hispanic veterans relative to Non-Hispanic White were found to have significantly lower utilization of all services examined, except imaging. Neurology was found to be the utilization mediator with the highest percent of excess risk (3.40%) while age was the non utilization confounder with the highest percent of excess risk (31.49%). In fully adjusted models for demographics and co-morbidities, Hispanic veterans relative to Non-Hispanic Whites were found to have less total visits (IRR 0.89), TBI clinic (IRR 0.43), neurology (IRR 0.35), rehabilitation (IRR 0.37), and other visits (IRR 0.85) with only higher mental health visits (IRR 1.53).Conclusions:We found evidence that utilization is a partial mediator between race/ethnicity and mortality, especially neurology utilization. We also found that Hispanic veterans receive significantly less TBI clinic, neurology, rehabilitation and other types of utilization. The use of innovative system factors (decision aids, information tools, patient activation, and adherence support interventions) could be valuable in enhancing utilization of specific TBI related services, especially among ethnic minorities.

Prevalence and trends in psychotropic medication use among US male veterans, 1999-2010.

Prior studies of psychotropic medication use among US veterans are limited in their ability to generalize estimates to the full veteran population and make comparisons with non-veterans. This study estimated the prevalence of psychotropic medication use and trends over time among male US veterans, compared their use of psychotropic medications with non-veteran males, and examined differences among veteran subpopulations. The data for our analysis came from the National Health and Nutrition Examination Survey (1999-2010), a cross-sectional, nationally representative study of the civilian, non-institutionalized US population. The percentage of male veterans who used any psychotropic medication increased from 10.4% in 1999-2002 to 14.3% in 2003-2006, then remained stable in 2007-2010 (14.0%). During the same time period, the percentage of non-veteran males who used psychotropic medications remained relatively stable (7.0%, 8.3%, and 9.2%, respectively). Veterans were more likely to use psychotropic medication, specifically antidepressants, than non-veterans. The percentage of non-Hispanic white veterans and veterans aged 60 years and over who used psychotropic medications increased between 1999-2002 and 2003-2006, but the percentages remained stable between 2003-2006 and 2007-2010. In 2003-2006 and 2007-2010, a higher percentage of non-Hispanic white veterans used psychotropic medications than non-Hispanic black veterans. This study found that the use of psychotropic medications and antidepressants was higher among male veterans than male non-veterans, and that prevalence of use increased between 1999-2002 and 2007-2010 for male veterans but remained relatively stable for non-veterans. There were significant variations in the use of psychotropic medications among veteran subpopulations.

Effectiveness of Group-Delivered Cognitive Therapy and Treatment Length in Women Veterans with PTSD.

The effectiveness and length of group-delivered cognitive treatment for Posttraumatic Stress Disorder (PTSD) was examined in a sample of women veterans. The sample included 271 primarily non-Hispanic white (61%) and Hispanic (25%) women veterans treated in 8-, 10-, or 12-group length sessions with manualized cognitive therapy for PTSD. Outcome was measured with the PTSD Symptom Checklist (PCL) in an intention-to-treat analysis (N = 271), in completer subjects (n = 172), and with group as the unit of analysis (n = 47 groups). Significant decreases in PTSD were found in the full sample (effect size [ES] range = 0.27 to 0.38), completers (ES range = 0.37 to 0.54), and group as the unit of analysis (ES range = 0.71 to 0.92), suggesting effectiveness of cognitive group treatment for PTSD. PCL scores significantly improved in the 8, 10, and 12 group lengths, with no differences between each. Clinical improvement showed a third decreasing 10 or more PCL points and 22% no longer meeting PTSD diagnostic criteria, with the best results in the 10-session group. The results suggest group-delivered cognitive therapy is an effective, efficient, time-limited treatment for PTSD.

Prevalence and correlates of suicidal ideation among Operation Enduring Freedom and Operation Iraqi Freedom veterans

BackgroundWe sought to determine the prevalence and correlates of suicidal ideation (SI) among Operation Enduring Freedom and Operation Iraqi Freedom (OEF/OIF) veterans following the Department of Veterans Affairs′ (VA) 2007 implementation of required brief SI assessments for veterans who screen positive for depression and post-traumatic stress disorder. MethodsWe retrospectively identified OEF/OIF veterans screened for depression using the Patient Health Questionnaire (PHQ-2) between April 2008 and September 2009 at three geographically-distinct VA Medical Centers′ primary care or mental health clinics. Veteran responses to a two-item risk assessment tool (VA Pocket Card) or PHQ-9 9th item, administered following a positive depression screen (PHQ-2≥3), were determined using manual chart review. Generalized estimating equations were used to calculate adjusted odds ratios for demographic and clinical correlates of positive SI assessments. ResultsOf 1340 OEF/OIF veterans with positive depression screens, 32.4% reported SI. In multivariate models, odds of SI were lower for non-Hispanic white veterans (AOR=0.68) and greater for those with PHQ-2≥5 (AOR=1.87), depression (AOR=1.45), bipolar disorder/schizophrenia (AOR=2.84), and 2 or ≥3 diagnoses (AORs=1.59 and 2.49, respectively). LimitationsStudy findings may not be generalizable to non-veteran patient populations and the study does not address the reliability and validity of tools employed for brief suicidal ideation assessment. ConclusionsSI is common among OEF/OIF veterans who receive VA care, perhaps more so among non-white veterans. Targeting veterans with higher PHQ-2 scores for SI assessment should be considered to reduce patient and administrative burden.

A National Study of Racial Differences in Pain Screening Rates in the VA Health Care System

To determine whether black patients are less likely to be screened for pain than white patients. A sample of 25,382 black and 220,122 non-Hispanic white Veterans Affairs (VA) patients was identified among the panel surveyed in the ambulatory care module of the 2007 Survey of Health Care Experiences of Patients. This was a cross-sectional analysis of documentation of a pain score in the electronic medical record at the patient's Survey of Health Care Experiences of Patients index visit. Hierarchical logistic regression analyses were used to examine the association between race and documentation of pain screening. After accounting for site and whether the patient was a new or established primary care patient, black VA patients were significantly less likely than their white counterparts to be screened for pain, odds ratio: 0.79, P<0.0001, with estimated screening rates of 78% and 82% for black and white established primary care patients at a typical VA site, respectively. Further adjusting for demographics, medical and psychological comorbidity, prescription of pain medication, and health care utilization reduced the odds ratio to 0.86, P<0.0001). Additional analyses revealed that this reduction in odds ratio was primarily explained by higher rates of outpatient visits to the VA in the previous 2 years among black patients, which was associated with lower rates of screening at the index visit. Rates of screening were lower among black patients. The magnitude of this disparity was small and was explained, in part, by racial variation in prior health care utilization.

Health-Related Quality of Life Among US Veterans and Civilians by Race and Ethnicity

IntroductionAmong veterans, having been selected into the military and having easy access to medical care during and after military service may reduce premature mortality but not morbidity from mental distress and may not improve health-related quality of life. The objective of this study was to determine whether veterans in different racial/ethnic groups differ in their health-related quality of life from each other and from their civilian counterparts.MethodsAmong 800,000 respondents to the 2007–2009 Behavioral Risk Factor Surveillance System surveys, approximately 110,000 identified themselves as veterans and answered questions about their sociodemographic characteristics, self-rated health, and recent health-related quality of life. Nonoverlapping 95% confidence intervals of means distinguished veterans and civilians of different racial/ethnic groups.ResultsVeteran and civilian American Indians/Alaska Natives reported more physically unhealthy days, mentally unhealthy days, and recent activity limitation days than their veteran and civilian counterparts in other racial/ethnic groups. Non-Hispanic white veterans and Hispanic veterans reported more physically unhealthy days, mentally unhealthy days, and recent activity limitation days than their civilian counterparts.ConclusionUnlike findings in other studies, our findings show that veterans’ health-related quality of life differs from that of civilians both within the same racial/ethnic group and among different racial/ethnic groups. Because once-healthy soldiers may not be as healthy when they return to civilian life, assessing their health-related quality of life over time may identify those who need help to regain their health.

Mental Health Treatment Involvement and Religious Coping among African American, Hispanic, and White Veterans of the Wars of Iraq and Afghanistan

Although racial/ethnic differences have been found in the use of mental health services for depression in the general population, research among Veterans has produced mixed results. This study examined racial/ethnic differences in the use of mental health services among 148 Operation Enduring/Iraqi Freedom (OEF/OIF) Veterans with high levels of depression and posttraumatic stress disorder (PTSD) symptoms and evaluated whether religious coping affected service use. No differences between African American, Hispanic, and Non-Hispanic white Veterans were found in use of secular mental health services or religious counseling. Women Veterans were more likely than men to seek secular treatment. After controlling for PTSD symptoms, depression symptom level was a significant predictor of psychotherapy attendance but not medication treatment. African American Veterans reported higher levels of religious coping than whites. Religious coping was associated with participation in religious counseling, but not secular mental health services.

Longitudinal Differences in Glycemic Control by Race/Ethnicity Among Veterans With Type 2 Diabetes

To examine longitudinal differences in glycemic control between non-Hispanic white and non-Hispanic black veterans with type 2 diabetes. Retrospective cohort study. VA facility in the Southeastern United States. A 3-month person-period dataset was created for 8813 veterans with type 2 diabetes between June 1997 and May 2006. Primary outcome was mean change in hemoglobin A1c (HbA1c) over time. Secondary outcome was the odds of poor glycemic control over time (HbA1c >8%). For the primary outcome, a linear mixed model (LMM) approach was used to model the relationship of HbA1c levels and race/ethnicity over time. For the secondary outcome, generalized LMMs were used to assess whether glycemic control changed over time and whether change in glycemic control varied by racial/ethnic group. Mean age was 66.3 years, 36% were non-Hispanic black (NHB), 98% were male, 65% were married, and 50% were unemployed. Mean follow-up time was 4.4 years. Least square mean HbA1c levels from LMM adjusted for time and relevant confounders showed that NHBs had higher HbA1c values over time (mean difference of 0.54% [P < 0.001]). The final model with poor versus good glycemic control as the dependent variable, race/ethnicity as primary independent variable adjusted for time, and relevant confounders showed that NHBs were likely to have poor control compared with NHWs (OR: 1.8, 95% CI, 1.7; 2.0, P < 0.0001). NHB veterans were more likely to have higher mean HbA1c values and less likely to have good glycemic control over time compared with NHW veterans.

Associations Between Race and Ethnicity and Receipt of Advice About Alcohol Use in the Department of Veterans Affairs

This study sought to identify racial and ethnic differences in rates of alcohol-related advice given to veterans treated in Veterans Affairs (VA) facilities. This was a cross-sectional analysis of data from the VA Survey of the Healthcare Experiences of Patients (SHEP). Participants were 255,522 veterans treated in VA ambulatory clinics in fiscal year 2005. SHEP measures included alcohol consumption questions from the Alcohol Use Disorders Identification Test and an item inquiring whether a VA clinician had given advice about drinking. Logistic regression was used to examine relationships between race and ethnicity categories and receipt of alcohol-related advice. Covariate measures included demographic characteristics and physical and mental component summary scores from the Veterans RAND Health Survey (VR-12). Among veterans who consumed any alcohol, compared with veterans from the other racial or ethnic groups, Asian, Native Hawaiian, or Pacific Islander veterans were less likely to be in the medium and highest alcohol consumption categories and non-Hispanic white veterans were less likely to be in the highest alcohol consumption category (p<.001). In a model adjusting for demographic characteristics, physical and mental health status, and alcohol consumption category, among veterans who consumed any alcohol, those who were non-Hispanic black (odds ratio [OR]=1.65, 95% confidence interval [CI]=1.47-1.84), Hispanic (OR=1.56, CI=1.35-1.80), or non-Hispanic American Indian or Alaska Native (OR=1.56, CI=1.06-2.29) were more likely to report receiving alcohol-related advice, compared with non-Hispanic white veterans. The results suggest that veterans from certain minority groups are more likely than white veterans to report receiving alcohol-related advice in the VA, after the model is adjusted for demographic characteristics, health status, and alcohol consumption. Further research is needed to understand the underlying reasons for observed differences in receipt of alcohol-related advice and the potential clinical implications.

Racial/ethnic differences in stroke mortality in veterans.

We examined racial-ethnic differences in all-cause mortality after stroke in a cohort of veterans living in the southeastern United States. Data on a cohort of 4115 veterans with a diagnosis of stroke were analyzed. The cohort included veterans who classified themselves as non-Hispanic White, non-Hispanic Black, or Other. All veterans had a diagnosis of ischemic or hemorrhagic stroke. All subjects were seen in Veterans Affairs facilities in the Charleston, South Carolina area and were followed from January 1, 2000 to December 31, 2006. Cox proportional hazards regression models were used to compare survival times by race/ethnicity, adjusting for relevant covariates. In 38 months of follow-up, 1232 veterans in the cohort died. Compared with non-Hispanic White veterans, Black veterans were approximately 20% more likely to die, and other ethnicities were approximately 20% less likely to die in the unadjusted model. In the adjusted model, the White-Black disparity increased somewhat, and the disparity between Whites and other ethnicities was somewhat attenuated. Age, coronary heart disease, cancer, and Charlson co-morbidity index >2 were also associated with higher mortality. Non-Hispanic Black veterans with a history of stroke in the southeastern United States had significantly higher mortality than did Non-Hispanic White veterans and veterans of other ethnicities, even after adjusting for relevant covariates.

Posttraumatic Stress Disorder Among Hispanic Vietnam Veterans

The purpose of this study was to examine posttraumatic stress disorder (PTSD) among Hispanics who served in the Vietnam War. The authors conducted secondary data analyses of the National Vietnam Veterans Readjustment Study, a national epidemiologic study completed in 1988 of a representative sample of veterans who served during the Vietnam era (N=1,195). After adjustment for premilitary and military experiences, the authors found that Hispanic, particularly Puerto Rican, Vietnam veterans had significantly more severe PTSD symptoms and a higher probability of experiencing PTSD than nonminority veterans. However, they had no greater risk for other mental disorders, and their greater risk for PTSD was not explained by acculturation. Despite their more severe symptoms, Hispanic veterans, especially Puerto Rican veterans, showed no greater functional impairment than non-Hispanic white veterans. Hispanic Vietnam veterans, especially Puerto Rican Vietnam veterans, have a higher risk for PTSD and experience more severe PTSD symptoms than non-Hispanic white Vietnam veterans, and these differences are not explained by exposure to stressors or acculturation. This high level of symptoms was not accompanied by substantial reduction in functioning, suggesting that the observed differences in symptom reporting may reflect features of expressive style rather than different levels of illness.