Depressive disorders among cohorts of women veterans with diabetes, heart disease, and hypertension

Daily Functioning of Veterans With Type 2 Diabetes: Protocol for an Ambulatory Assessment Study

BACKGROUND

Diabetes impacts nearly 25% of veterans. Many veterans do not engage in recommended physical activity and other diabetes self-management behaviors. Type 2 diabetes is generally asymptomatic; as such, the long-term consequences of inadequate self-management and benefits of consistent self-management are not salient in the short term. Furthermore, self-management behaviors typically take place outside of medical visits; however, self-management-related factors are only assessed during medical visits, likely missing large amounts of variability. Thus, ambulatory assessment methods such as ecological momentary assessment (EMA), accelerometry, and continuous glucose monitoring are needed to understand the dynamics of daily self-management and identify potential intervention targets.

OBJECTIVE

The overarching goal of this study is to understand daily, time-varying factors (comorbid affective symptoms and social context) that influence physical activity, diabetes self-management, glycemic management, daily functioning, and quality of life in participants' natural environments.

METHODS

We are recruiting veterans with type 2 diabetes (target N=100). Participants are required to complete a battery of baseline assessments related to mental health, psychosocial factors, and self-management behaviors. Participants then receive 5 momentary EMA surveys and 1 daily EMA survey per day, in which veterans report comorbid affective symptoms (mood, stress, and pain), social support, social interactions, physical activity, and other self-management behaviors. Momentary surveys are delivered randomly during daily preprogrammed intervals over a 14-day sampling period. Accelerometry and continuous glucose monitoring are also used to assess physical activity and blood glucose, respectively. The first 6 participants also completed interviews assessing their experience in the study and barriers to participation. These test participants informed modifications to the protocol for the remaining participants.

RESULTS

The project received funding in April of 2023. Enrollment began in March of 2023 and is planned to be completed in April 2025. Among the 6 test participants, the overall EMA response rate was 87% (range 74%-95%). The response rate for the EMA survey including daily items (67%, range 21%-93%) was lower than the earlier shorter EMA surveys (89%, range 81%-96%). The mean rate of valid accelerometer wear of at least 20 hours per day was 93% (SD 11%), and continuous glucose monitoring data were available for 91% (SD 17%) of days on average. Participants reported few barriers to completing EMA surveys but noted the random timing of questions made it difficult to plan around, and the end-of-day survey was long. Two participants reported survey items reminded or motivated them to engage in diabetes self-management behaviors.

CONCLUSIONS

Assessment tools developed from this study can inform clinical decision-making by considering barriers to self-management that occur in daily life. Clinical applications include tailored, adaptive technology-supported interventions to improve self-management that provide the right type and amount of support at the right time by adapting to an individual's changing internal and contextual state.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

DERR1-10.2196/53874.

Clinical Complexity in Women Veterans: A Systematic Review of the Recent Evidence on Mental Health and Physical Health Comorbidities

A recent evidence map focused on women veterans underscored the limited number of articles published on mental health comorbid with physical health conditions in this population. The quality of this small body of research has yet to be evaluated. The aim of this systematic review was to evaluate and synthesize research published between 2008 and 2015 and identified in the Women Veterans' Health Research Evidence Map as related to mental and physical health comorbidities among women veterans. Following PRISMA guidelines, 23 published studies were identified and 21 were included in the review. In general, significant associations between several mental health conditions (e.g., depression, posttraumatic stress disorder, substance use disorders) and physical health disorders (e.g., cardiovascular disease, diabetes, gastrointestinal disorders, hypertension, obesity, pain, and urinary symptoms) and health behaviors (e.g., preventative care and treatment adherence) were noted. The majority of studies were rated as low risk of bias, with selection and detection bias most frequently observed across studies. Additionally, gaps in the recent literature were observed, including the need for further investigation of the role of medical conditions in complicating mental health symptoms and care provision. Results underscore the importance of healthcare providers attending to women veterans' mental and physical health simultaneously and irrespective of setting. Further, while the Department of Veterans Affairs continues to make sizable gains in its focus on women veterans' health, continued research on several health domains is needed to ensure adequate understanding of the health needs of women veterans.

Association between arginine catabolism and major depressive disorder: A protocol for the systematic review and meta-analysis of metabolic pathway

BACKGROUND

Alterations in the levels of arginine and its related catabolic products (ie, ornithine, citrulline, and argininosuccinate) in the urea and nitric oxide cycles were reported to play roles in the pathogenesis of major depressive disorder (MDD). The aim of this meta-analysis study is to explore the associations between arginine with its related catabolic products and MDD, and to discuss the possible role of arginine catabolism in the pathoetiology of MDD.

METHODS

This study will be conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. The English language literature published in the databases of PubMed, EMBASE, PsycINFO and Web of Science will be systematically searched. Forest plots will be used to estimate the associations between arginine and its related catabolic products with MDD. Subgroup analysis and meta-regression will also be performed to investigate the source of the potential heterogeneity. Sensitivity analysis will be performed to strengthen the results and to investigate whether any single study would have a significant effect on the results of meta-analysis. Publication bias will be tested for using the funnel plot with Begg test and Egger test. The Newcastle-Ottawa Scale will be applied to assess the risk of bias of observational studies.

RESULTS

An integrated assessment of arginine with its related catabolic products may contribute to predict the risk of MDD.

ETHICS AND DISSEMINATION

The results of associations between arginine with its related catabolic products and MDD will be reported in a peer-reviewed publication. With our findings from this meta-analysis, we hope to provide the most up-to-date evidence for the contributions of arginine and related catabolic products to predict the risk of MDD.

SYSTEMATIC REVIEW REGISTRATION

The protocol of current meta-analysis has been registered at the Open Science Framework [Available at: https://doi.org/10.17605/osf.io/7fn59].

An Evidence Map of the Women Veterans' Health Research Literature (2008-2015)

BACKGROUND

Women comprise a growing proportion of Veterans seeking care at Veterans Affairs (VA) healthcare facilities. VA initiatives have accelerated changes in services for female Veterans, yet the corresponding literature has not been systematically reviewed since 2008. In 2015, VA Women's Health Services and the VA Women's Health Research Network requested an updated literature review to facilitate policy and research planning.

METHODS

The Minneapolis VA Evidence-based Synthesis Program performed a systematic search of research related to female Veterans' health published from 2008 through 2015. We extracted study characteristics including healthcare topic, design, sample size and proportion female, research setting, and funding source. We created an evidence map by organizing and presenting results within and across healthcare topics, and describing patterns, strengths, and gaps.

RESULTS

We identified 2276 abstracts and assessed each for relevance. We excluded 1092 abstracts and reviewed 1184 full-text articles; 750 were excluded. Of 440 included articles, 208 (47%) were related to mental health, particularly post-traumatic stress disorder (71 articles), military sexual trauma (37 articles), and substance abuse (20 articles). The number of articles addressing VA priority topic areas increased over time, including reproductive health, healthcare organization and delivery, access and utilization, and post-deployment health. Three or fewer articles addressed each of the common chronic diseases: diabetes, hypertension, depression, or anxiety. Nearly 400 articles (90%) used an observational design. Eight articles (2%) described randomized trials.

CONCLUSIONS

Our evidence map summarizes patterns, progress, and growth in the female Veterans' health and healthcare literature. Observational studies in mental health make up the majority of research. A focus on primary care delivery over clinical topics in primary care and a lack of sex-specific results for studies that include men and women have contributed to research gaps in addressing common chronic diseases. Interventional research using randomized trials is needed.

A Health Profile of Senior-Aged Women Veterans: A Latent Class Analysis of Condition Clusters

Background and Objectives

This study characterizes the multiple morbidities experienced by senior-aged women Veterans so that the Veterans Health Administration (VHA) and other health care systems may be better prepared to meet the health care needs of this growing cohort.

Research Design and Methods

Using the VHA’s Corporate Data Warehouse, we conducted a retrospective observational study of the 38,597 female veteran patients who were at least 65 years old and received care in the VHA during 2013 and 2014. We use a latent class analysis model to cluster diagnoses associated with inpatient and outpatient events over the years.

Results

The senior-aged women Veterans are characterized by six major classes of disease clusters. We defined these classes as: Healthy (16.24% of the cohort); Ophthalmological Disorders (13.84%); Musculoskeletal Disorders (14.22%); At Risk for Cardiovascular Disease (37.53%); Diabetic with Comorbidities (9.05%); and Multimorbid (9.12%). The patterns and prevalence of these condition classes vary by race, age, and marital status.

Discussion and Implications

Each of the six clusters can be used to develop clinical practice guidelines that are appropriate for senior-aged women Veterans. Consistent with past literature, the most common conditions in this cohort are hypertension and hyperlipidemia; together they form the most common class, “At Risk of Cardiovascular Disease (CVD)”. Results also show evidence of race-related disparities, with Blacks being more likely to be in the highest risk classes. Also, members of the cohort who are currently married having improved chances of being in the healthy class. And finally, we see a “healthy survivor” effect with the oldest women in our cohort having low overall rates of disease.

Association Between Mental Health Burden and Coronary Artery Disease in U.S. Women Veterans Over 45: A National Cross-Sectional Study

BACKGROUND

The women Veteran population accessing Veterans Health Administration (VA) care has grown rapidly. Women Veterans exhibit high rates of mental health conditions that increase coronary artery disease (CAD) risk; however, the relationship between specific conditions and increasing mental health burden to CAD in this population is unknown.

MATERIALS AND METHODS

Using VA National Patient Care Data for 2009, we identified women Veterans over 45 (N = 157,195). Logistic regression models examined different mental health diagnoses and increasing mental health burden (number of diagnostic clusters) as predictors of CAD.

RESULTS

CAD prevalence was 4.16%, and 36% of women Veterans were current smokers. Depression exhibited the strongest association with CAD (odds ratio [OR] 1.60, 95% confidence interval [CI] [1.50-1.71]), similar to that of current smoking (OR 1.68 [1.58-1.78]). Controlling for demographic variables, smoking, diabetes, and obesity, each additional mental health diagnosis increased the odds of CAD by 44%.

CONCLUSIONS

Women Veterans over age 45 accessing VA care exhibited a high degree of mental health burden, which is associated with elevated odds of CAD; those with depression alone had 60% higher odds of CAD. For women Veterans using VA, mental health diagnoses may act as CAD risk factors that are potentially modifiable. Novel interventions in primary care and mental health are needed to address heart disease in this growing and aging population.

Heart matters: Gender and racial differences cardiovascular disease risk factor control among veterans

BACKGROUND

Cardiovascular disease (CVD) is the leading cause of mortality for U.S. women. Racial minorities are a particularly vulnerable population. The increasing female veteran population has an higher prevalence of certain cardiovascular risk factors compared with non-veteran women; however, little is known about gender and racial differences in cardiovascular risk factor control among veterans.

METHODS

We used analysis of variance, adjusting for age, to compare gender and racial differences in three risk factors that predispose to CVD (diabetes, hypertension, and hyperlipidemia) in a cohort of high-risk veterans eligible for enrollment in a clinical trial, including 23,955 men and 1,010 women.

FINDINGS

Low-density lipoprotein (LDL) values were higher in women veterans than men with age-adjusted estimated mean values of 111.7 versus 97.6 mg/dL (p < .01). Blood pressures (BPs) were higher among African-American than White female veterans with age-adjusted estimated mean systolic BPs of 136.3 versus 133.5 mmHg, respectively (p < .01), and diastolic BPs of 82.4 versus 78.9 mmHg (p < .01). African-American veterans with diabetes had worse BP, LDL values, and hemoglobin A1c levels, although the differences were only significant among men.

CONCLUSIONS

Female veterans have higher LDL cholesterol levels than male veterans and African-American veterans have higher BP, LDL cholesterol, and A1c levels than Whites after adjusting for age. Further examination of CVD gender and racial disparities in this population may help to develop targeted treatments and strategies applicable to the general population.

Improving care of chronic conditions for women veterans: identifying opportunities for comparative effectiveness research

This article aims to critically analyze research focused on the findings for five chronic conditions: chronic pain, diabetes, cardiovascular disease, HIV and cancer among women veterans to identify opportunities for comparative effectiveness research. We provide a descriptive analysis from the relevant articles in prior systematic reviews. In order to identify potential gaps in research for these specific conditions, we also conducted a literature search to highlight studies focusing on women veterans published since the last systematic review. While the scientific knowledge base has grown for these chronic conditions among women veterans, the vast majority of the published literature remains descriptive and/or observational, with only a few studies examining gender differences and even fewer clinical trials. There is a need to conduct comparative effectiveness research on chronic conditions among women veterans to improve health and healthcare.

Ameliorative effect of saffron aqueous extract on hyperglycemia, hyperlipidemia, and oxidative stress on diabetic encephalopathy in streptozotocin induced experimental diabetes mellitus

Diabetic encephalopathy is one of the severe complications in patients with diabetes mellitus. Findings indicate that saffron extract has antioxidant properties but its underlying beneficial effects on diabetic encephalopathy were unclear. In the present study, the protective activities of saffron were evaluated in diabetic encephalopathy. Saffron at 40 and 80 mg/kg significantly increased body weight and serum TNF-α and decreased blood glucose levels, glycosylated serum proteins, and serum advanced glycation endproducts (AGEs) levels. Furthermore, significant increase in HDL and decrease (P<0.05) in cholesterol, triglyceride, and LDL were observed after 28 days of treatment. At the end of experiments, the hippocampus tissue was used for determination of glutathione content (GSH), superoxide dismutase (SOD), and catalase (CAT) activities. Furthermore, saffron significantly increased GSH, SOD, and CAT but remarkably decreased cognitive deficit, serum TNF-α, and induced nitric oxide synthase (iNOS) activity in hippocampus tissue. Our findings indicated that saffron extract may reduce hyperglycemia and hyperlipidemia risk and also reduce the oxidative stress in diabetic encephalopathy rats. This study suggested that saffron extract might be a promising candidate for the improvement of chemically induced diabetes and its complications.

Caregiving experiences and health conditions of women veteran and non-veteran caregivers

BACKGROUND

Unique experiences, for example, trauma, of women veteran caregivers may create differences in the caregiving experience and may be associated with health concerns. We examined caregiving factors and health concerns in women veteran caregivers compared to non-veteran women (civilian) caregivers, and identified variables associated with being a woman veteran caregiver.

METHODS

We conducted secondary data analyses using data from a multistate survey to examine sociodemographics, the caregiver experience (relationship to recipient, duration as caregiver, hours of care provided, area help is needed, and greatest difficulty faced as a caregiver); emotional support; life satisfaction; lifestyle behaviors; general, physical, and mental health; and chronic conditions in women informal caregivers.

FINDINGS

Of women caregivers, more veteran caregivers provided activities of daily living (ADL) help (33%) than non-veteran caregivers (21%; p = .02). There were no differences in years as a caregiver, hours of care provided, or the relationship to the recipient. Poor sleep and poor mental health were experienced by more women veteran caregivers (vs. non-veteran), but physical health, general health, and chronic condition prevalence did not differ. Women veteran caregivers had twofold greater odds of being Black, never married, college educated, and providing ADL assistance. Odds of obesity were lower for women veteran caregivers relative to other women caregivers.

CONCLUSIONS

Women veteran caregivers experience health concerns, including sleeplessness, poor mental health, and some chronic conditions. Our cohort were young women, yet had concerns that may be exacerbated by being a veteran and assuming a caregiver role. Comprehensive services to support their needs as veteran patients and as caregivers are needed.

Physical co-morbidity among treatment resistant vs. treatment responsive patients with major depressive disorder

Co-morbid physical illness has been suggested to play an important role among the factors contributing to treatment resistance in patients with major depressive disorder. In the current study we compared the rate of physical co-morbidity, defined by ICD-10, among a large multicenter sample of 702 patients with major depressive disorder. A total of 356 of the participants were defined as treatment resistant depression (TRD) patients-having failed two or more adequate antidepressant trials. No significant difference was found between TRD and non-TRD participants in the prevalence of any ICD-10 category. This finding suggests that although physical conditions such as diabetes, thyroid dysfunction, hypertension, ischemic heart disease, and peptic diseases are often accompanied by co-morbid MDD, they do not necessarily have an impact on the course of MDD or the likelihood to respond to treatment. Marginally higher rates of co-morbid breast cancer, migraine and glaucoma were found among TRD participants. Possible explanations for these findings and their possible relation to TRD are discussed.

Increased oxidative stress and imbalance in antioxidant enzymes in the brains of alloxan-induced diabetic rats

Diabetes Mellitus (DM) is associated with pathological changes in the central nervous system (SNC) as well as alterations in oxidative stress. Thus, the main objective of this study was to evaluate the effects of the animal model of diabetes induced by alloxan on memory and oxidative stress. Diabetes was induced in Wistar rats by using a single injection of alloxan (150 mg/kg), and fifteen days after induction, the rats memory was evaluated through the use of the object recognition task. The oxidative stress parameters and the activity of antioxidant enzymes, superoxide dismutase (SOD), and catalase (CAT) were measured in the rat brain. The results showed that diabetic rats did not have alterations in their recognition memory. However, the results did show that diabetic rats had increases in the levels of superoxide in the prefrontal cortex, and in thiobarbituric acid reactive species (TBARS) production in the prefrontal cortex and in the amygdala in submitochondrial particles. Also, there was an increase in protein oxidation in the hippocampus and striatum, and in TBARS oxidation in the striatum and amygdala. The SOD activity was decreased in diabetic rats in the striatum and amygdala. However, the CAT activity was increased in the hippocampus taken from diabetic rats. In conclusion, our findings illustrate that the animal model of diabetes induced by alloxan did not cause alterations in the animals' recognition memory, but it produced oxidants and an imbalance between SOD and CAT activities, which could contribute to the pathophysiology of diabetes.

Imipramine treatment reverses depressive-like behavior in alloxan-diabetic rats

BACKGROUND

A growing body of evidence has shown an association between diabetes and depression, as well a role of brain-derived neurotrophic factor (BDNF) in diabetes and depression. The present study was designed to evaluate the behavioural and molecular effects of the anti-depressant imipramine in diabetic rats.

METHODS

To this aim, after induction of diabetes by alloxan (150 mg/kg), Wistar rats were treated with imipramine (30 mg/kg) once a day for 14 days and then subjected to behavioural tests. BDNF was then assessed in the prefrontal cortex, hippocampus and amygdala.

RESULTS

In diabetic rats treated with saline, we observed an increase in the immobility time, compared with control rats treated with saline. Treatment with imipramine decreased the immobility time in nondiabetic and diabetic rats, compared with both nondiabetic and diabetic rats treated with saline. In the open-field test, it was observed that treatment with imipramine reduced the number of crossings the diabetic rats performed, compared with nondiabetic rats treated with saline. The number of rearings did not alter in any of the groups. Diabetic rats injected with saline did not show altered BDNF levels in the prefrontal cortex, hippocampus or amygdala, but interestingly, the treatment with imipramine in diabetic animals increased BDNF levels in the prefrontal cortex.

CONCLUSIONS

In conclusion, this study demonstartes a link between diabetes and depression in rats and that imipramine exerted antidepressant effects in diabetic animals.

Decomposing gender differences in low-density lipoprotein cholesterol among veterans with or at risk for cardiovascular illness

OBJECTIVES

To measure the extent to which gender differences in poor lipid control among individuals at risk for cardiovascular diseases could be explained by patient-level characteristics.

STUDY DESIGN

Cross-sectional analyses of merged Veteran Health Administration (VHA) and Medicare claims data for the fiscal years (FY) 2002 and 2003 consisting of veterans using VHA facilities and were diagnosed with diabetes or heart disease or hypertension during FY 2002 and had recorded LDL cholesterol values in FY2003 (N = 527,568). There were 10,582 women and 516,986 men veterans. Poor lipid control was defined as LDL cholesterol values ≥130 mg/dL. Multivariate techniques consisted of logistic regressions. Based on the parameter estimates and distribution of individual characteristics, we used a decomposition technique to analyze factors that contributed to the gender difference in poor lipid control.

PRINCIPAL FINDINGS

A significantly higher percent of women (27.4%) than men (17.1%) had LDL cholesterol values ≥130 mg/dL. Of the 10.3 percentage point difference in lipid control, 3.4 percentage points were explained by variables included in the model. The gender difference in poor lipid control was mostly explained by age, physical illnesses, use of lipid lowering medications and depression.

CONCLUSIONS

Only one-third of the gender difference in poor lipid control could be explained by differences in individual characteristics, some of which are modifiable or could be used to identify groups at risk with poor lipid control. Our findings suggest that gender differences in lipid control could be partially reduced by increasing the prescription of lipid lowering drugs and treating depression among women. Interventions that improve lipid control in the non-elderly will also benefit women. However the largest part of the difference in lipid control between women and men remains unexplained and further research is needed to identify additional modifiable and unmodifiable factors.