Erin Madden

Gender differences in traumatic experiences and mental health in active duty soldiers redeployed from Iraq and Afghanistan

The purpose of this study was to examine gender differences in combat exposure, military sexual trauma (MST), and their associations with mental health screen results among military personnel deployed in support of the wars in Afghanistan and Iraq. Data were collected as part of a pre- and post-deployment screening program at a large Army medical treatment facility. Cases included 7251 active duty soldiers (6697 men and 554 women) who presented for their pre- and post-deployment screening from March 2006 to July 2009. Pre-deployment mental health symptoms were statistically controlled for in our analyses. We found significant gender differences in demographic variables, exposure to combat, and MST. Women reported greater exposure to MST than did men. Although men reported greater exposure to high-intensity combat experiences than women, results indicate that women are experiencing combat at higher rates than observed in prior cohorts. Men were more likely to report problem drinking, and women were more likely to report depression symptoms. There were no gender differences with respect to PTSD symptoms. Although we found few differences between women and men in the impact of combat stressors on mental health, there was a stronger association between injury and PTSD symptoms for women than for men. Our findings indicate that it would be useful for clinicians to be aware of this difference and assess for exposure to a full range of traumatic combat experiences, particularly injury, as not all types of combat experiences may be equally experienced by men and women returning from military deployments.

Association of Antiretroviral Therapy with Fibrinogen Levels in HIV Infection

Background:HIV infection is associated with an increased risk of coronary artery disease, but the contribution of inflammation versus antiretroviral drugs is not well understood. Fibrinogen is an inflammatory factor associated with atherosclerosis. Methods:A total of 1131 HIV-infected patients and 281 controls [from the Coronary Artery Risk Development in Young Adults (CARDIA) study, a population-based study of cardiovascular risk assessment] in the Study of Fat Redistribution and Metabolic Change in HIV infection (FRAM) had plasma fibrinogen levels measured. Multivariable linear regression identified factors associated with fibrinogen. Results:HIV-infected patients had higher levels of fibrinogen compared with controls (males: 25 mg/dl higher, P = 0.006; females: 21 mg/dl higher, P = 0.39). Among HIV-infected persons, median levels of fibrinogen were 11% higher in patients currently using any protease inhibitor (PI) compared with those not using a PI (P < 0.0001). The strongest univariate associations were with the individual PIs, ritonavir and indinavir. Patients taking indinavir boosted with ritonavir had median fibrinogen levels 8% higher than those on indinavir alone (P = 0.049). Lower levels of fibrinogen were seen in those HIV-infected patients currently using any nonnucleoside reverse transcriptase inhibitor (NNRTI) compared to those not using an NNRTI (nevirapine −14.4%, P < 0.0001; efavirenz −7%, P = 0.0002). The associations of ritonavir, indinavir, efavirenz and nevirapine with fibrinogen levels persisted after multivariable analysis and were independent of other antiretroviral use. Conclusion:Protease inhibitor use is associated with elevated fibrinogen levels which may contribute to increased risk of atherosclerosis in HIV-infected patients. Conversely, NNRTI use is associated with lower fibrinogen levels which may decrease risk of atherosclerosis.

Killing and latent classes of PTSD symptoms in Iraq and Afghanistan veterans

BACKGROUND Our goal was to better understand distinct PTSD symptom presentations in Iraq and Afghanistan Veterans (N=227) and to determine whether those who killed in war were at risk for being in the most symptomatic class. METHODS We used latent class analysis of responses to the PTSD checklist and logistic regression of most symptomatic class. RESULTS We found that a four-class solution best fit the data, with the following profiles emerging: High Symptom (34% of participants), Intermediate Symptom (41%), Intermediate Symptom with Low Emotional Numbing (10%), and Low Symptom (15%). The largest group of individuals who reported killing (45%) was in the High Symptom class, and those who killed had twice the odds of being in the most symptomatic PTSD class, compared to those who did not kill. Those who endorsed killing a non-combatant (OR=4.56, 95% CI [1.77, 11.7], p<0.01) or killing in the context of anger or revenge (OR=4.63, 95% CI=[1.89, 11.4], p<0.001) were more likely to belong to the most symptomatic PTSD class, compared to those who did not kill. LIMITATIONS The study was retrospective and cross-sectional. The results may not generalize to veterans of other wars. CONCLUSIONS Killing in war may be an important indicator of risk for developing frequent and severe PTSD symptoms. This has implications for the mental healthcare of veterans, providing evidence that a comprehensive evaluation of returning veterans should include an assessment of killing experiences and reactions to killing.

Gender Differences in Health Service Utilization Among Iraq and Afghanistan Veterans with Posttraumatic Stress Disorder

BACKGROUND Little is known about gender differences in healthcare use among newly returning veterans with posttraumatic stress disorder (PTSD). We investigated gender differences in Veterans Affairs (VA) medical center health service use among Iraq and Afghanistan veterans with PTSD with and without comorbid depression and alcohol use disorders (AUD). METHODS Using VA administrative data, bivariate and multivariate statistics were used to examine gender differences in health service use among 159,705 Operation Enduring Freedom/Operation Iraqi Freedom (OEF/OIF) veterans with PTSD seeking VA healthcare from October 7, 2001, to December 31, 2010. RESULTS Female veterans with PTSD were more likely to be black and single and to have higher mental health, primary care, and emergency care use compared to men with PTSD. Men were more likely to have higher mental health inpatient use compared to women. Women and men with comorbid PTSD and depression or comorbid PTSD and AUD were more likely to have higher use in all domains compared to their counterparts with PTSD without these comorbid disorders. Women with comorbid PTSD and depression were 12.5 times more likely to have a mental health inpatient hospitalization compared to their female counterparts without depression and twice as likely to have a mental health hospitalization compared to men with comorbid PTSD and depression. CONCLUSIONS Women with PTSD had higher use than men in almost all areas, as did all veterans with comorbid PTSD and depression and comorbid PTSD and AUD, regardless of gender. Better understanding these health service use differences will allow for targeted evaluation and integrated treatment interventions in veterans with PTSD.

Carotid Intima-Media Thickness Among Human Immunodeficiency Virus–Infected Patients Without Coronary Calcium

Subjects infected with human immunodeficiency virus (HIV) have increased risk for atherosclerosis. Carotid artery intima-media thickness (IMT) assessed using ultrasound and coronary artery calcium (CAC) detected using computed tomography predict cardiovascular risk in the general population; however, their usefulness and comparability in patients with HIV are less well defined. The purpose of this study was to compare IMT and CAC in the detection of atherosclerosis in subjects with HIV. CAC and IMT were measured in 253 HIV-infected and 58 uninfected adults. Associations among HIV-related factors, traditional risk factors, and CAC and IMT were evaluated. The distribution of IMT among subjects with and without CAC was compared. Among the patients with HIV, 37% had detectable CAC compared to 28% of controls (p = 0.19); 16% of the patients with HIV had CAC >100 compared to 5% of controls (p = 0.03). With either detectable or undetectable CAC, HIV-infected subjects had higher IMT compared to controls (1.02 ± 0.34 vs 0.78 ± 0.12 mm, p <0.0001), even after adjustment for traditional risk factors. Among those with undetectable CAC, 34% of patients with HIV had markedly increased IMT (≥1 mm) compared to no controls (p <0.0001). HIV-related factors were associated with IMT but not with CAC. In conclusion, patients with HIV and controls had similar rates of detectable CAC, while absolute CAC scores were modestly higher in the HIV group. Conversely, carotid IMT detected advanced subclinical atherosclerosis in patients with HIV even in the absence of CAC. Thus, with HIV, IMT is associated with disease-related factors and may be a more sensitive indicator of subclinical atherosclerosis than CAC.

Financial ties of principal investigators and randomized controlled trial outcomes: cross sectional study

Objective To examine the association between the presence of individual principal investigators’ financial ties to the manufacturer of the study drug and the trial’s outcomes after accounting for source of research funding. Design Cross sectional study of randomized controlled trials (RCTs). Setting Studies published in “core clinical” journals, as identified by Medline, between 1 January 2013 and 31 December 2013. Participants Random sample of RCTs focused on drug efficacy. Main outcome measure Association between financial ties of principal investigators and study outcome. Results A total of 190 papers describing 195 studies met inclusion criteria. Financial ties between principal investigators and the pharmaceutical industry were present in 132 (67.7%) studies. Of 397 principal investigators, 231 (58%) had financial ties and 166 (42%) did not. Of all principal investigators, 156 (39%) reported advisor/consultancy payments, 81 (20%) reported speakers’ fees, 81 (20%) reported unspecified financial ties, 52 (13%) reported honorariums, 52 (13%) reported employee relationships, 52 (13%) reported travel fees, 41 (10%) reported stock ownership, and 20 (5%) reported having a patent related to the study drug. The prevalence of financial ties of principal investigators was 76% (103/136) among positive studies and 49% (29/59) among negative studies. In unadjusted analyses, the presence of a financial tie was associated with a positive study outcome (odds ratio 3.23, 95% confidence interval 1.7 to 6.1). In the primary multivariate analysis, a financial tie was significantly associated with positive RCT outcome after adjustment for the study funding source (odds ratio 3.57 (1.7 to 7.7). The secondary analysis controlled for additional RCT characteristics such as study phase, sample size, country of first authors, specialty, trial registration, study design, type of analysis, comparator, and outcome measure. These characteristics did not appreciably affect the relation between financial ties and study outcomes (odds ratio 3.37, 1.4 to 7.9). Conclusions Financial ties of principal investigators were independently associated with positive clinical trial results. These findings may be suggestive of bias in the evidence base.

Relationship of screen-based symptoms for mild traumatic brain injury and mental health problems in Iraq and Afghanistan veterans: Distinct or overlapping symptoms?

This study used factor analytic techniques to differentiate distinct from overlapping screen-based symptoms of traumatic brain injury (TBI), posttraumatic stress disorder (PTSD), and depression in Iraq and Afghanistan veterans. These symptoms were derived from screen results of 1,549 veterans undergoing Department of Veterans Affairs postdeployment screening between April 2007 and January 2010. Veterans with positive TBI screens were approximately twice as likely to also screen positive for depression and PTSD (adjusted relative risks = 1.9 and 2.1, respectively). Irritability was a shared symptom between TBI and PTSD, and emotional numbing was a shared symptom between PTSD and depression. Symptoms unique to TBI included dizziness, headaches, memory problems, and light sensitivity. Four separate constructs emerged: TBI, PTSD, depression, and a fourth construct consisting of hypervigilance and sleep problems. These findings illuminate areas of overlap between TBI and common postdeployment mental health problems. Discriminating symptoms of TBI from mental health problems may facilitate diagnosis, triage to specialty care, and targeted symptom management. The emergence of a fourth factor consisting of sleep problems and hypervigilance highlights the need to attend to specific symptoms in the postdeployment screening process.

Eating Disorders and Psychiatric Comorbidity among Iraq and Afghanistan Veterans

OBJECTIVE Individuals with mental health problems are at elevated risk for eating disorders. Veterans serving in support of the conflicts in Afghanistan and Iraq (OEF/OIF) have a high prevalence of deployment-related mental health problems, but little is known about their risk for eating disorders. Our aim was to determine rates of eating disorder diagnoses among OEF/OIF veterans with mental health problems, particularly among those with comorbid mental health problems. METHODS This retrospective, cross-sectional analysis of nationwide VA healthcare facilities used descriptive statistics and regression analyses to determine eating disorder rates in OEF/OIF veterans who were new users of VA healthcare from October 7, 2001 to December 31, 2010 (N = 593,739). RESULTS Although the prevalence of eating disorder diagnoses was 0.007% (n = 465) in women and <0.001% (n = 192) in men, veterans diagnosed with mental health problems were significantly more likely to have an eating disorder than those without mental health diagnoses. Eating disorders were significantly more common in women with depression, posttraumatic stress disorder, and alcohol and/or drug use disorders than in women veterans without these mental health disorders. Among men, the associations between eating disorder diagnoses and comorbid mental health diagnoses closely paralleled those observed in women. CONCLUSIONS Rates of eating disorders are significantly higher among returning veterans with comorbid mental health problems compared with those without mental health diagnoses. Further research should examine methods to improve detection and treatment of eating disorders in this population.

Association of mental health problems with gastrointestinal disorders in Iraq and Afghanistan veterans.

Gastrointestinal disorders (GIDs) represent a large public health burden, affecting an estimated 60–70 million Americans annually. Our goal was to examine the relationship between GID and the most common mental health disorders in a national group of newly returning veterans. We also evaluated gender differences in the association of mental health disorders and GID.

Suicide risk in Iraq and Afghanistan veterans with mental health problems in VA care

Suicide rates among U.S. military personnel and veterans are a public health concern, and those with mental health conditions are at particular risk. We examined demographic, military, temporal, and diagnostic associations with suicidality in veterans. We conducted a population-based, retrospective cohort study of all Iraq and Afghanistan war veterans who screened positive for posttraumatic stress disorder (PTSD) and/or depression, received a suicide risk assessment, and endorsed hopelessness about the present or future after their last deployment and between January 1, 2010 and June 29, 2014 (N = 45,741). We used bivariate and multivariate logistic regression analyses to examine variables associated with having endorsed suicidal thoughts and a plan. Multiple factors were associated with suicidality outcomes, including longer time from last deployment to screening (proxy for time to seeking VA care), an alcohol use disorder diagnosis, further distance from VA (rurality), and being active duty during military service. Hispanic veterans were at decreased risk of having suicidal ideation and a plan, compared to their white counterparts. In high-risk veterans, some of the strongest associations with suicidality were with modifiable risk factors, including time to VA care and alcohol use disorder diagnoses. Promising avenues for suicide prevention efforts can include early engagement/intervention strategies with a focus on amelioration of high-risk drinking.