The following manuscripts have been published or are currently in press. Listings are in chronological order, unless otherwise noted.
| Title | Publication | Date/Location |
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| New-Onset Asthma and Combat Deployment: Findings from the Millennium Cohort Study | American Journal of Epidemiology | 2018 Oct 1;187(10):2136-2144 |
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Rivera AC, Powell TM, Boyko EJ, Lee RU, Faix DJ, Luxton DD, and Rull RP New-onset asthma developed in 2.7% of men and 4.6% of women during the follow-up period, among participants without a prior diagnosis of asthma at baseline. Compared with those who did not deploy, those who deployed with combat experience were 24-30% more likely to develop asthma, even after controlling for smoking status and other covariates. No elevated risk was observed for deployers who did not experience combat. Additional risk factors for asthma among both men and women included Hispanic ethnicity, overweight or obesity, Army service, stressful life events, PTSD, and health care or other technical occupations. |
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| Health Status of Gulf War and Era Veterans Serving in the US Military in 2000 | Journal of Occupational and Environmental Medicine | 2018 May;60(5):e261-e267 |
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Porter B, Long K, Rull RP, Dursa EK for the Millennium Cohort Study Team This paper describes Gulf War Veterans and non-deployed Gulf era personnel enrolled in the Millennium Cohort Study. Comparing distributions of survey responses with those from a population-based sample collected by the VA, we found that Millennium Cohort participants reported slightly better health, particularly regarding mental health. The Millennium Cohort Study is an important resource for investigating the health effects of Gulf War deployment. |
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| A Decade of War: Prospective Trajectories of Posttraumatic Stress Disorder Symptoms Among Deployed US Military Personnel and the Influence of Combat Exposure Reply | American Journal of Epidemiology | 2018 May 4;187(7):1570-1575 |
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Donoho CJ, Bonanno GA, Porter B, Kearney L, and Powell TM Details the reasons that the results found in "A decade of war: Prospective trajectories of post-traumatic stress disorder symptoms among deployed US military personnel and the influence of combat exposure" are not likely to be confounded by mefloquine side effects. |
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| Factors Associated With Persistent Posttraumatic Stress Disorder Among U.S. Military Service Members and Veterans | BMC Psychiatry | 2018 Feb 17;18(1):48 |
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Armenta RF, Rush T, LeardMann CA, Millegan J, Cooper AD, Hoge, CW Among service members and veterans who screened positive for PTSD at baseline, 47% met the criteria for persistent PTSD. Combat experiences and PTSD severity were found to be the most salient factors associated with persistent PTSD; other associated factors included co-morbid conditions, sleep problems, and somatic symptoms. These findings corroborate the need for more comprehensive and accessible treatment to address both PTSD symptoms and comorbid conditions. |
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| Measuring Aggregated and Specific Combat Exposures: Associations Between Combat Exposure Measures and Posttraumatic Stress Disorder, Depression, and Alcohol-Related Problems | Journal of Traumatic Stress | 2018 Apr;31:296-306 |
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Porter B, Hoge CW, Tobin LE, Donoho CJ, Castro CA, Luxton DD, Faix D This study compared two measures of combat exposure and showed that both measures were similarly predictive of poor mental health. The unique contributions of specific exposures to poor mental health were also examined. While all combat exposure items were related to poor mental health, relatively stronger independent associations were observed for certain exposures (e.g., witnessing instances of physical abuse). |
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| Patterns of Smoking and Unhealthy Alcohol Use Following Sexual Trauma Among US Service Members | Journal of Traumatic Stress | 2017 Oct;30(5):502-511 |
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Seelig AD, Rivera AC, Powell TM, Williams EC, Peterson AV, Littman AJ, Maynard C, Street AE, Bricker JB, Boyko EJ Following sexual assault while serving in the military, women had double the risk for unhealthy alcohol use relapse while men had 6 times the risk for smoking relapse compared with women and men who did not experience sexual assault, respectively. No other associations between sexual trauma (assault or harassment) and subsequent smoking or unhealthy alcohol use were observed. Substance use prevention measures are recommended for those who experience sexual assault and have a history of smoking and unhealthy alcohol use. |
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| Prospective Post-Traumatic Stress Disorder Symptom Trajectories in Active Duty and Separated Military Personnel | Journal of Psychiatric Research | 2017 Jun;89:55-64 |
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Porter B, Bonanno GA, Frasco MA, Dursa EK, Boyko EJ This study compared trajectories of PTSD symptoms between separated and continuously serving Active Duty participants. Trajectories among both groups were highly similar and separated into four classes: resilient, delayed-onset, improving, and elevated-recovering. Resilient trajectories (i.e., having low PTSD symptoms throughout the study period) were the most common trajectory in both groups, although they were less common among separated (82%) compared with continuously serving (87%) personnel. Interventions targeted toward individuals with delayed-onset trajectories may prevent sub-clinical PTSD from worsening. |
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| Risk Factors Associated with Miscarriage and Impaired Fecundity Among United States Servicewomen During the Recent Conflicts in Iraq and Afghanistan | Women's Health Issues | 2017 Feb;27(3):356-365 |
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Ippolito AC, Seelig AD, Powell TM, Conlin AMS, Crum-Cianflone NF, Lemus H, Sevick CS, LeardMann CA Among Servicewomen aged 18-45 years, 31% reported a miscarriage and 11% reported impaired fecundity (infertility) during a 3-year study period. Findings suggest that deployments in support of the operations in Iraq and Afghanistan do not increase the risk for miscarriage and infertility among U.S. Servicewomen. More research is needed to better understand whether specific combat experiences or environmental exposures encountered during deployments increase the risk for adverse reproductive health outcomes. |
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| Epidemiology of Inflammatory Bowel Disease Among Participants of the Millennium Cohort: Incidence, Deployment-Related Risk Factors, and Antecedent Episodes of Infectious Gastroenteritis | Alimentary Pharmacology & Therapeutics | 2017 Apr;45(8):1115-1127 |
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Porter CK, Welsh M, Riddle MS, Nieh C, BoykoEJ, Gackstetter GD, Hooper TI This study describes the incidence of and risk factors for two pathotypes of inflammable bowel disease (IBD), Crohn's Disease (CD) and ulcerative colitis (UC) among Millennium Cohort Study participants using survey responses as well as data from post-deployment health assessments and medical encounters in the Military Health System. We observed that CD risk predictors included current smoking, two life stressors (vs. none), and prior irritable bowel syndrome. For UC, a dose-response relationship between the risk of UC and an increasing number of life stressors was observed. Antecedent infectious gastroenteritis was associated with an almost three-fold increase in risk in UC, but was not associated with CD. Stressful conditions along with infectious gastroenteritis are usual features of any deployment operation and may play a role in the development of IBD. However, observed differences in risk factors for UC and CD warrant further investigation. |
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| Evaluation of a Modified Version of the Posttraumatic Growth Inventory-Short Form | BMC Research Methodology | 2017 Apr;17(1):69 |
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Kaur N, Porter B, LeardMann CA, Tobin TE, Lemus H, Luxton DD This study sought to validate a modified measure of posttraumatic growth, personal growth, and change that may occur following trauma. Results indicate that this modified measure may be used to assess well-being at one time point or growth over two time points. Furthermore, the two items assessing spirituality had a strong relationship with each other and may be used alone in future studies. |
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