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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| Association of Problematic Anger With Long-term Adjustment Following the Military-to-Civilian Transition | JAMA Network Open | 2022 Jul 1 | doi: 10.1001/jamanetworkopen.2022.23236 |
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Adler AB, LeardMann CA, Villalobos J, Jacobson IG, Forbes D, for the Millennium Cohort Study Team In the Millennium Cohort Study's third paper documenting the risks associated with problematic anger, 15.9% of active duty service members reported problematic anger two years before military separation. This prevalence essentially doubled to 31.2% two years following separation. Problematic anger around the time of military separation was associated with PTSD, depression, low relationship quality, difficulties coping with parental demands, low social support, and economic difficulties approximately 5 years later, after adjustment for demographics and baseline health. Findings suggest that training in emotion regulation may improve the military-to-civilian transition. |
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| Combat exposure and behavioral health in U.S. Army Special Forces | PLoS One | 2022 Jun 28 | doi: 10.1371/journal.pone.0270515 |
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Rivera AC, LeardMann CA, Rull RP, Cooper A, Warner S, Faix D, Deagle E, Neff R, Caserta R, Adler AB, Millennium Cohort Study Team In this cross-sectional study using Millennium Cohort Study data, various types of combat, such as combat severity, fighting, threat to oneself, and killing noncombatants, were consistently associated with mental health disorders, trouble sleeping, and problem drinking among all three Army occupational specialization investigated (General Purpose Forces infantrymen, Ranger Qualified infantrymen, and Special Forces personnel). However, with few exceptions, Special Forces personnel and Ranger Qualified infantrymen had lower prevalence of these adverse outcomes. Findings suggest that even elite personnel may be negatively impacted by experiencing combat, thus trainings and interventions focused on moral conflict reasoning and resolution may help to mitigate some of these adverse behavioral outcomes. |
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| The Millennium Cohort Study: The First 20 Years of Research Dedicated to Understanding the Long-Term Health of US Service Members and Veterans | Annals of Epidemiology | 2022 Mar;67:61-72 |
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Belding JN, Castañeda SF, Jacobson IG, LeardMann CA, Porter B, Powell TM, Kolaja CA, Seelig AD, Matsuno RK, Carey FR, Rivera AC, Trone DW, Sheppard B, Walstrom J, Boyko EJ, Rull RP, For The Millennium Cohort Study Team In commemoration of the 20th anniversary of the Millennium Cohort Study, this paper provides a summary of the study design, key findings, and future directions. Published findings are summarized and categorized into 3 core areas (psychological health, physical health, and health-related behaviors) and several crosscutting areas culminating in more than 120 publications to date. The Study will continue to foster stakeholder relationships such that research findings inform and guide policy initiatives and health promotion efforts. |
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| The Effect of Combat Exposure on Financial Problems | International Review of Economics and Finance | 2022 May | doi: 10.1016/j.iref.2022.02.042 |
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Ackerman A, Porter, B This paper examined whether combat exposure led to new-onset financial problems and financial stress among 64,508 veterans using 2001-2016 data from the Millennium Cohort Study. The average predicted probability of developing a new major financial problem (such as bankruptcy) and greater financial stress increased 0.44% (21% relative to the mean probability) following a single combat exposure and increased 0.90% (43% relative to the mean probability) following multiple combat exposures. The likelihood of financial decline resulting from combat exposure were greater for veterans with poorer pre-deployment mental or physical health, veterans in enlisted ranks, and younger veterans between the ages of 26 and 36. These results translate to a crude cost estimate of lost productivity of at least $41 million and up to 3,629 bankruptcies for the 2.7 million veterans (1.34 per 1,000) deployed from 2001 through 2016. |
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| Health Disparities Among Lesbian, Gay, and Bisexual Service Members and Veterans | American Journal of Preventive Medicine | 2022 Oct | doi: 10.1016/j.amepre.2022.04.034 |
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Carey FR, LeardMann CA, Lehavot K, Jacobson IG, Kolaja CA, Stander VA, Rull RP, Millennium Cohort Study Team This study examined whether differences in mental, physical, and behavioral health exist by sexual orientation among active duty and Reserve/National Guard service members and veterans (N=96,930). Lesbian, gay, and bisexual (LGB) individuals (3.6% of the sample) were more likely to screen positive for post-traumatic stress disorder, depression, anxiety, binge eating, problematic anger, multiple somatic symptoms, and insomnia than heterosexual individuals. LGB women reported more adverse health outcomes (overweight and obesity, smoking, problem/risky drinking) than heterosexual women. Gay and bisexual men reported some adverse health outcomes (e.g., smoking and problem drinking) but better physical health (e.g., less overweight/obesity) than heterosexual men. These results suggest that LGB service members experience health disparities, despite many having equal eligibility for health care, highlighting the need for improved equity initiatives that promote cultural responsiveness, acceptance, and approaches to support the healthcare needs of LGB military members. |
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| The relative impact of injury and deployment on mental and physical quality of life among military service members | PLoS One | 2022 Sep 29 | doi: 10.1371/journal.pone.0274973 |
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Kolaja CA, Castañeda SF, Woodruff SI, Rull RP, Armenta RF Deployment and injury status was associated with poorer mental and physical quality of life (QOL) with clinically significant decreases in physical QOL observed for those who deployed and were injured, either in battle or nonbattle settings, compared with uninjured deployers. |
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| Brief Report: Menstrual Suppression Among U.S. Female Service Members in the Millennium Cohort Study | Medical Surveillance Monthly Report | 2022 Sept 29(9), 19-22 |
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Zhu Y, Kolaja CA, Stamas N, Matsuno RK, Rull RP; Millennium Cohort Study Team This study examined the prevalence of self-reported menstrual suppression among U.S. female active duty personnel (N=22,920) at two time points (2008, 2013) by demographic and military characteristics. Menstrual suppression increased significantly overall from 2008 (2.5%) to 2013 (3.8%) and among younger age groups (aged 18-34), non-Hispanic White individuals, Army, Navy, or Air Force personnel. The highest prevalence of menstrual suppression was reported in 2013 among those who deployed in the past year (4.7%) or worked in health care (5.1%) or combat specialties (4.7%). Increased health education is needed to support the health care needs and readiness of female service members. |
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| Cohort Profile Update: The US Millennium Cohort Study - evaluating the impact of military experiences on service members and veteran health | International Journal of Epidemiology | 2023 Aug 2 | doi: 10.1093/ije/dyad088 |
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Castañeda SF, Belding JN, Kolaja CA, LeardMann CA, Jacobson IG, Rivera AC, Carey FR, Boparai S, Walstrom JL, Sheppard BD, Boyko EJ, Ryan MAK, Rull RP This paper provides an update to the original cohort profile paper published a decade ago. The Study includes 260,228 military personnel enrolled across 5 panels between 2001 and 2021 (baseline age range: 25-35 years), where participants are surveyed every 3-5 years through 2068. Longitudinal survey data are linked to administrative and medical data from DoD, VA, and external sources. The breadth of research topics has expanded over the past decade with the continued aim of contributing to policies and programs that improve service member and Veteran health and wellbeing. |
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| Identifying at-risk marines: A person-centered approach to adverse childhood experiences, mental health, and social support | Journal of Affective Disorders | 2023 Mar 15 | doi: 10.1016/j.jad.2023.01.020 |
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Reed-Fitzke K, LeardMann CA, Wojciak AS, Ferraro AJ, Hamilton A, Duncan JM, Rull RP In a sample of male Marines (n=3,881), five subgroups based on adverse childhood experiences were identified. One in five Marines reported moderate to elevated levels of childhood adversity. A history of varying types of childhood adversity characterized by parental absence was associated with greater PTSD and depression symptomology and lower levels of social support. When attempting to identify Marines most at-risk for mental health concerns, the identification of specific patterns of childhood adversity, particularly regarding parental absence, may be more valuable. |
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| Pre-incentive Efficacy in Survey Response Rates in a Large Prospective Military Cohort | Field Methods | 2023 Mar 17 | doi: 10.1177/1525822X231163668 |
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Powell TM, Geronimo-Hara TR, Tobin LE, Donoho CJ, Sheppard BD, Walstrom JL, Rull RP, Faix DJ U.S. military and veteran populations are challenging to retain in longitudinal studies as they span the globe, frequently move, and are heavily surveyed. This study tested the effectiveness of multiple pre-incentives ($2 bill, $5 gift card, magnet, and Apple iPad lottery entry) on increasing the response rate to the 2014 survey of the Millennium Cohort Study. Findings suggest that providing participants a monetary pre-incentive was an effective way to increase response rates and participant retention as well as re-engage participants who did not respond to a previous follow-up survey. |
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