Comprehensive examination of etiological factors and clinical manifestations of maxillofacial traumas in forensic cases: A five-year retrospective study.

BACKGROUND: Maxillofacial injuries, due to their diverse etiological causes, are often considered a component of multi-trauma and constitute a significant portion of trauma. This study aims to elucidate the incidence of maxillofacial traumas, particularly among military personnel, various clinical courses, and characteristics, thereby contributing to the literature. METHODS: Forensic reports, primarily related to military personnel and organized between 2011 and 2016 at the Forensic Medicine Department of Gülhane Medical Faculty, Health Sciences University, were retrospectively examined. The study involved a detailed analysis of cases with maxillofacial injuries resulting from trauma, focusing on aspects such as age, gender, the origin of the trauma, degree of injury, the presence of bone and dental fractures, and the occurrence of psychiatric disorders as a result of the trauma. RESULTS: This study demonstrated that maxillofacial traumas predominantly occurred in young male individuals, particularly among military personnel. The most common etiological factor identified was interpersonal violence. The majority of injuries were soft tissue damages, with the nasal bone being the most frequently fractured area. Injuries to the head and upper extremities were also detected in some of the cases, showing that multiple injuries are common in such cases. Post-traumatic psychological disorders developed in some cases, with anxiety disorders being the most commonly observed. CONCLUSION: It has been determined that maxillofacial injuries can affect multiple body regions, necessitating a multidisciplinary approach. This study underscores the importance of developing comprehensive strategies and policies for understanding and managing maxillofacial traumas, providing a fundamental reference for future studies in this field.

Core Mental Health Clinician Capacity and Use Rates in the US Military.

Importance: Active duty service members have higher mental health stress and cannot choose where to live. It is imperative to understand how geographic access may be associated with their ability to obtain mental health treatment and how the COVID-19 pandemic was associated with these patterns. Objective: To identify changes in the prevalence and intensity of mental health care use when service members experienced changes in core mental health clinician (defined to include psychiatrists, psychiatric nurse practitioners, clinical psychologists and social workers, and marriage and family therapists) capacity in their communities and whether patterns changed from before to after the onset of the COVID-19 pandemic. Design, Setting, and Participants: This retrospective cohort study of the active duty population between January 1, 2016, and December 31, 2022, was conducted using individual fixed-effects models to estimate changes in the probability of mental health care visits and visit volume when a person moved across communities with adequate core mental health clinician capacity (≥1 clinician/6000 beneficiaries), shortage areas (<1 clinician/6000 beneficiaries), and areas with 0 clinicians within a 30-minute drive time. All US active duty service members stationed in the continental US, Hawaii, and Alaska were included. Data were analyzed from January through July 2024. Main Outcomes and Measures: The first set of outcomes captured the probability of making at least 1 mental health care visit in a given quarter; the second set of outcomes captured the intensity of visits (ie, the number of visits log transformed). Results: This study included 33 039 840 quarterly observations representing 2 461 911 unique active duty service members from the Army, Navy, Marines, and Air Force (1 959 110 observations among Asian or Pacific Islander [5.9%], 5 309 276 observations among Black [16.1%], 5 287 168 observations among Hispanic [16.0%], and 18 739 827 observations among White [56.7%] individuals; 27 473 563 observations among males [83.2%]; mean [SD] age, 28.20 [7.78] years). When an active duty service member moved from a community with adequate capacity at military treatment facilities to one with 0 clinicians within a 30-minute drive, the probability of a mental health visit to any clinician decreased by 1.13 percentage points (95% CI, -1.21 to -1.05 percentage points; equivalent to a 11.6% relative decrease) and the intensity of total visits was reduced by 7.7% (95% CI, -9.0% to -6.5%). The gap increased from before to after the onset of the COVID-19 pandemic, from 8.5% (equivalent to -0.82 percentage points [95% CI, -0.92 to -0.73 percentage points]) to 16.2% (equivalent to -1.58 percentage points [95% CI, -1.70 to -1.46 percentage points]) in the probability of visiting any clinician type for mental health. Conclusions and Relevance: In this study, active duty personnel assigned to locations without core military mental health clinicians within a 30-minute drive time were less likely to obtain mental health care and had fewer mental health care visits than those in communities with adequate military mental health capacity even if there was adequate coverage from the civilian sector. The care disparity increased after the onset of the COVID-19 pandemic.

Incidence and risk factors for hip fractures among U.S. Armed Forces active component women compared to men, 2018-2022.

Women, who comprise approximately 18% of the U.S. Armed Forces, suffer disproportionately higher rates of musculoskeletal injuries among active component service members. Using a retrospective study design, this study calculated incidence rates and rate ratios for acute hip fractures and hip stress fractures from January 1, 2018 through September 30, 2022 among female and male active component U.S. military members. Women who were younger than age 20 years, in recruit training, serving in the Army or Marine Corps, engaged in combat-related occupations, and with body mass indexes in the underweight or normal weight categories had the highest rates of both types of fractures. Women who had progressed beyond the recruit training phase had a higher female-to-male rate ratios of hip stress fractures than recruits. Despite an overall decline during the surveillance period, rates of acute hip fracture and hip stress fracture were higher among women than men. Changes in training and fitness policies may have contributed to the hip fracture rate declines among women. Continued efforts are needed to further reduce injuries among women.

Vitamin D deficiency trends, risk factors, and occupational risk in active component service members of the U.S. Armed Forces, 2018-2022.

Vitamin D contains 2 related fat-soluble substances, D3 and D2, that are essential for bone health and overall well-being. The burden of vitamin D deficiency within the active component of the armed forces is unknown. This study describes trends of vitamin D deficiency diagnoses in the active component of the U.S. Armed Forces. Risk factors for vitamin D, such as military occupation, were examined to see if preventive measures and targeted vitamin D screening would be beneficial, as the United States Preventive Task Force does not recommend universal screening for vitamin D, nor does TRICARE cover screening for asymptomatic individuals. The surveillance period covered January 1, 2018 through December 31, 2022. The data were derived from the Defense Medical Surveillance System (DMSS). Vitamin D deficiency was measured using ICD-9-CM and ICD-10-CM diagnoses recorded in inpatient and outpatient medical encounters. Incidence rate and average annual prevalence were calculated. A logistic regression was performed to obtain adjusted odds ratios. The rates of vitamin D deficiency diagnoses among active component service members (ACSMs) remained steady during the study period, with an incidence rate of 16.4 per 1,000 person-years and an average annual prevalence of 2.2%. Female service members, those of older age groups, and indoor workers demonstrated higher rates of vitamin D deficiency. Previously described demographic risk factors such as indoor work and history of obesity or malabsorption syndrome were also associated in this study with vitamin D deficiency in ACSMs, although older age groups in this study were not associated with vitamin D deficiency. Pilots and air crew had the lowest rates of vitamin D deficiency, while health care workers had the highest, when evaluating by occupation.

Malaria in the Australian military, 2008-2022.

Australian Defence Force (ADF) personnel train and operate in malarious regions that include neighboring countries with high burden and species with latent hepatic parasites.1 We summarized longitudinal malaria case data, following a prior 10-year period review to 2007.2 Malaria case entries within the ADF Malaria and Infectious Diseases Institute (ADFMIDI)-managed Central Malaria Register (CMR) were examined. Data from cases confirmed between January 1, 2008 through December 31, 2022 were analyzed. Sixty ADF members were diagnosed with malaria, including 1 with a mixed Plasmodium falciparum and P. vivax infection. Of 61 malaria infections, 69% (42 of 61) were P. vivax. P. vivax infection resulted in delayed initial case presentation (more than 4 weeks after exposure) in at least 36% (15 of 42) of cases, and 5 personnel experienced further relapse. Most P. vivax infections were acquired in the U.S. Indo-Pacific Command (INDOPACOM) and P. falciparum in the U.S. Africa Command (AFRICOM) regions. The ADF experienced ongoing reduced malaria case incidence following high rates in the early 2000s. Maintenance of prophylactic vigilance, both for eradicating dormant hypnozoites and preventing P. vivax relapse, remains important, however.

Lymphatic filariasis in soldiers exposed in INDOPACOM.

Some military organizations in the U.S. Indo-Pacific Command (INDOPACOM) give returning soldiers presumptive treatment for filariasis. As there have been few clinical cases in recent decades, the historical basis for this chemotherapy was reviewed. During the Second World War, U.S. Marines stationed on Polynesian islands such as Tonga, Samoa, and Fiji experienced clinical lymphatic filariasis. Although thousands of both U.S. and Australian soldiers served in New Guinea, few, if any, cases of lymphatic filariasis were ascribed to Melanesia. While the French Army reported dozens of cases of filariasis among its service members during the 1950s Vietnam conflict, the U.S. military experienced only a few cases among the nearly 2 million service members who served in Vietnam in the 1960s. Australian soldiers deployed to Timor Leste in the 21st century showed rare seroconversions to filaria but no clinical disease. Following mass drug administration to eliminate lymphatic filaria in the INDOPACOM region, exposure in deployed soldiers rarely occurs and preventive chemotherapy should cease.

Factors associated with burnout in military police officers in a city in Paraná.

OBJECTIVE: to analyze the association between burnout and sociodemographic, work factors, lifestyle habits and health conditions of military police officers in a municipality in the state of Paraná, Brazil. METHOD: cross-sectional research with 131 military police officers. Data were analyzed using the Statistical Package for the Social Sciences software and the R program. Chi-square, Fisher's exact and Poisson Generalized Linear Model tests were used. RESULTS: most participants (65.6%) had a high level of burnout. In relation to protective factors, those who carried out leisure activities had a 33.6% chance of not developing burnout. Conjugality was also a protective factor. Not practicing physical activity and leisure activities are factors that can contribute to the occurrence of burnout. CONCLUSIONS: important factors and high rates of burnout were observed in the police officers investigated. It is necessary to implement public health policies to reduce burnout with attention focused on this professional category.

Construction and validation of a risk prediction model for soldiers with frostbite in northeast China: a cross-sectional study.

BACKGROUND: One of the challenges of physical training in extreme condition is frostbite, especially in Northeast China. In this study, we aimed to construct a risk prediction model for frostbite among soldiers in Northeast China, and verify its effect. METHODS: 698 participants were selected via convenience sampling from Northeast China from December 2021 to January 2022 (winter). They were randomly divided into a training set (N = 479) and a testing set (N = 202) in a ratio of 7:3. All participants completed a researcher-made questionnaire on frostbite. The prediction model was constructed through the use of Logistic regression analysis, which was used to predict the independent risk factors for frostbite formation and screen significant indicators. The model's performance was assessed using the receiver operating characteristic (ROC) curve and decision curve analysis (DCA) to evaluate the prediction efficiency and goodness of fit. RESULTS: The incidence of frostbite in the training set was 19.83% (95 people), all of which were first-degree frostbite. Among them, frostbite in multiple parts was the most common (58.95%), followed by singular body parts like hands (24.21%), ears (11.58%) and feet (5.26%). Single factor logistic regression analyses showed that ambient temperature, ambient wind speed, outdoor stationary time, stationary status, and history of frostbite are independent risk factors that affect the occurrence of frostbite. Furthermore, we constructed the frostbite risk prediction model for soldiers in the northeastern region of China. The area under the receiver operating characteristic curve (AUC) for the risk of frostbite in the training set and testing set was 0.816 (95% CI, 0.770 ~ 0.862) and 0.787 (95% CI, 0.713 ~ 0.860), respectively. The Hosmer-Lemeshow test of the model showed χ2 = 11.328 and P = 0.184 (> 0.05). The DCA curve indicated that most of the clinical net benefits of the model are greater than 0, demonstrating good clinical usefulness. CONCLUSION: The constructed frostbite prediction model can effectively identify soldiers with a higher risk of frostbite. It provided theoretical support for commanders to take preventive measures to reduce the incidence of frostbite among soldiers and was of great clinical guiding significance.

Wastewater Surveillance Pilot at US Military Installations: Cost Model Analysis.

Background: The COVID-19 pandemic highlighted the need for pathogen surveillance systems to augment both early warning and outbreak monitoring/control efforts. Community wastewater samples provide a rapid and accurate source of environmental surveillance data to complement direct patient sampling. Due to its global presence and critical missions, the US military is a leader in global pandemic preparedness efforts. Clinical testing for COVID-19 on US Air Force (USAF) bases (AFBs) was effective but costly with respect to direct monetary costs and indirect costs due to lost time. To remain operating at peak capacity, such bases sought a more passive surveillance option and piloted wastewater surveillance (WWS) at 17 AFBs to demonstrate feasibility, safety, utility, and cost-effectiveness from May 2021 to January 2022. Objective: We model the costs of a wastewater program for pathogens of public health concern within the specific context of US military installations using assumptions based on the results of the USAF and Joint Program Executive Office for Chemical, Biological, Radiological and Nuclear Defense pilot program. The objective was to determine the cost of deploying WWS to all AFBs relative to clinical swab testing surveillance regimes. Methods: A WWS cost projection model was built based on subject matter expert input and actual costs incurred during the WWS pilot program at USAF AFBs. Several SARS-CoV-2 circulation scenarios were considered, and the costs of both WWS and clinical swab testing were projected. Analysis was conducted to determine the break-even point and how a reduction in swab testing could unlock funds to enable WWS to occur in parallel. Results: Our model confirmed that WWS is complementary and highly cost-effective when compared to existing alternative forms of biosurveillance. We found that the cost of WWS was between US $10.5-$18.5 million less expensive annually in direct costs as compared to clinical swab testing surveillance. When the indirect cost of lost work was incorporated, including lost work associated with required clinical swab testing, we estimated that over two-thirds of clinical swab testing could be maintained with no additional costs upon implementation of WWS. Conclusions: Our results support the adoption of WWS across US military installations as part of a more comprehensive and early warning system that will enable adaptive monitoring during disease outbreaks in a more cost-effective manner than swab testing alone.

Between invisibility and resistance: indigenous health and demography during the Brazilian military dictatorship. / Entre invisibilidade e resistência: saúde e demografia indígenas durante a ditadura militar brasileira.

This article aims to systematize and analyze, from a historical perspective, the discussions that permeated the topic of indigenous health in interface with the demography of these populations, based on the political dimension that the quantification of indigenous peoples assumed during the military dictatorship in Brazil. Covering an extensive period that extends from the establishment of the Indian Protection Service in 1910 until the end of the 1980s, this article offers a comprehensive view of the topic. The analysis focuses primarily on the 1970s, highlighting the actors involved in this debate: indigenous leaders, indigenists, academics, health professionals, and missionaries.

Este artigo tem por objetivo sistematizar e analisar em perspectiva histórica as discussões que permearam o tema da saúde indígena em interface com a demografia dessas populações, partindo da dimensão política que a quantificação dos povos indígenas assumiu durante a ditadura militar no Brasil. Abrangendo um extenso período que se estende do estabelecimento do Serviço de Proteção aos Índios em 1910 até o fim dos anos 1980, busca-se oferecer uma visão ampliada sobre o tema. O foco da análise recai especialmente nos anos 1970, destacando os atores envolvidos neste debate: lideranças indígenas, indigenistas, acadêmicos, profissionais de saúde e missionários.

The Impact of Racism on Health: A Health Equity Training on Structural Racism for Military Residents and Fellows.

Introduction: Recognizing the need for more opportunities to learn about health equity within military graduate medical education (GME), we developed a resident-led curriculum to introduce these concepts from a military cultural competency lens. The Impact of Racism on Health module focuses on structural racism and health disparities. Methods: This 60-minute module was presented to ear, nose, and throat (ENT) and pediatrics residents and fellows. It includes a case presentation of an adolescent with an asthma exacerbation, a large-group discussion about social determinants of health and structural racism, and a small-group discussion/debrief conceptualizing the case. Results: Thirty pediatrics residents and 15 ENT residents participated in this activity with a 46% and 60% pretest response rate, respectively. A two-sample Mann-Whitney U test showed statistically significant improvement (p = .005) in knowledge related to structural racism between the pretest (M = 0.5, SD = 0.3) and posttest (M = 0.7, SD = 0.1) knowledge assessments with a small effect size (r = 0.4; Z = 2.8). Discussion: We demonstrated that interactive teaching methods can be used to educate military GME trainees on the impact of structural racism on health outcomes for military health care beneficiaries. Understanding the role of structural racism in the context of military health care using curricula that highlight military-specific health disparities is essential to understanding the role of the military physician in systemically addressing health disparities.

Oral health status of Dutch Armed Forces recruits in the years 2000, 2010 and 2020, a retrospective repeated cross-sectional study.

BACKGROUND: Studies on oral health status of adults are sparse and rarely include data on endodontic treatment and trauma. In the military, those data are available because recruits are routinely assessed with a clinical and radiological examination at the start of their career. This study aimed to identify differences in oral health status of Dutch Armed Forces recruits between cohorts, departments, sex, age and rank, with DMF-T, endodontic treatment and dental trauma as outcome measures. METHODS: Data from Electronic Patient Files from all recruits enlisted in 2000, 2010 and 2020 were used for analysis in a hurdle model resulting in the estimated cohort effect, controlled for the demographic variables. The total number of recruits was 5,764. Due to the retrospective character of the study a proxy was used to compose D-T and dental trauma. RESULTS: The mean DMF-T number in recruits decreases from 5.3 in cohort 2000 to 4.13 in cohort 2010 and 3.41 in cohort 2020. The percentage of endodontically treated teeth increases from 6% in cohort 2000 to respectively 9% in 2010 and 8% in 2020. The percentage of recruits showing signs of dental trauma did not change significantly between cohort 2000 (3.1%) and cohort 2010 and 2020 (both 2.7%). CONCLUSIONS: Oral health in Armed Forces recruits is improving over the years, following a similar trend as the general population in the Netherlands. Lower SES represented by enlisted rank showed substantial lower oral health status.

Maintaining a healthy lifestyle by service members under martial law.

OBJECTIVE: Aim: To study the peculiarities of maintaining a healthy lifestyle by service members under martial law. PATIENTS AND METHODS: Materials and Methods: The research was conducted in 2022-2024 and involved 60 service members aged 22 to 54. According to their military rank, the respondents were divided into the following groups: junior enlisted (51.7 %), non-commissioned officers (25 %) and commissioned officers (23.3 %). Methods: bibliographic, system analysis and generalization, medical and sociological (questionnaire survey), and statistical. RESULTS: Results: It was found that a healthy lifestyle for most service members is associated with motor activities (51.7 %), rational nutrition (55.9 %), the ability to cope with stress (42.4 %), and giving up bad habits (37.3 %). Only 46.7 % of service members adhere to the relevant principles, even though 55.0 % of respondents named a HLS as one of the values in their unit. It was found that it is difficult to fully adhere to the principles of a healthy lifestyle under the conditions of war. 76.7 % of service members have bad habits (the most common is smoking - 72.2 %). CONCLUSION: Conclusions: Promising means of forming a healthy lifestyle for service members are: positive motivation and personal conviction in the need to maintain a healthy lifestyle, high-quality medical care, conducting educational work with personnel about the benefits of leading a healthy lifestyle, etc. However, these measures will become fully effective only if we end the war with victory and liberate all Ukrainian lands from the occupying forces.

Morbidity burdens attributable to various illnesses and injuries among deployed active and reserve component service members of the U.S. Armed Forces, 2023.

This report updates previous analyses of health care burden distributions among active and reserve component service members of the U.S. Armed Forces in deployed settings. Musculoskeletal disorders in combination with administrative and other health services (ICD-10 "Z" codes) accounted for more than half of all medical encounters in 2023 among service members deployed to the U.S. Central Command (CENTCOM) and Africa Command (AFRICOM). Three common injury conditions occurred among male and female service members deployed to U.S. CENTCOM and U.S. AFRICOM: other back problems, arm and shoulder injuries, and knee injuries.

Medical evacuations out of U.S. Central and Africa commands among the active and reserve components of the U.S. Armed Forces, 2023

This report summarizes the nature, numbers, and trends of conditions for which military members were medically evacuated from the U.S. Central Command (CENTCOM) or Africa Central Command (AFRICOM) operations during 2023, with historical comparisons to the previous 4 years. Mental health disorders and injuries were the most common diagnostic categories in 2023 among service members medically evacuated from U.S. Central Command (CENTCOM) and U.S. Africa Command (AFRICOM). In 2023, 724 service members were medically evacuated from CENTCOM and 225 were evacuated from AFRICOM, with hospitalization required for 197 (27.2%) and 50 (22.2%), respectively. Most service members who were medically evacuated from CENTCOM or AFRICOM were returned to full duty status following their post-evacuation hospitalizations or outpatient evaluations. In 2023, evacuations for both battle and non-battle injuries from U.S. CENTCOM increased, following a period of decline. The number of service members medically evacuated in 2023 from AFRICOM remained unchanged from the previous year.

Using Physiological Biomarkers to Optimize Management of TBI in Austere Environments.

INTRODUCTION: Multimodal monitoring is the use of data from multiple physiological sensors combined in a way to provide individualized patient management. It is becoming commonplace in the civilian care of traumatic brain-injured patients. We hypothesized we could bring the technology to the battlefield using a noninvasive sensor suite and an artificial intelligence-based patient management guidance system. METHODS: Working with military medical personnel, we gathered requirements for a hand-held system that would adapt to the rapidly evolving field of neurocritical care. To select the optimal sensors, we developed a method to evaluate both the value of the sensor's measurement in managing brain injury and the burden to deploy that sensor in the battlefield. We called this the Value-Burden Analysis which resulted in a score weighted by the Role of Care. The Value was assessed using 7 criteria, 1 of which was the clinical value as assessed by a consensus of clinicians. The Burden was assessed using 16 factors such as size, weight, and ease of use. We evaluated and scored 17 sensors to test the assessment methodology. In addition, we developed a design for the guidance system, built a prototype, and tested the feasibility. RESULTS: The resulting architecture of the system was modular, requiring the development of an interoperable description of each component including sensors, guideline steps, medications, analytics, resources, and the context of care. A Knowledge Base was created to describe the interactions of the modules. A prototype test set-up demonstrated the feasibility of the system in that simulated physiological inputs would mimic the guidance provided by the current Clinical Practice Guidelines for Traumatic Brain Injury in Prolonged Care (CPG ID:63). The Value-Burden analysis yielded a ranking of sensors as well as sensor metadata useful in the Knowledge Base. CONCLUSION: We developed a design and tested the feasibility of a system that would allow the use of physiological biomarkers as a management tool in forward care. A key feature is the modular design that allows the system to adapt to changes in sensors, resources, and context as well as to updates in guidelines as they are developed. Continued work consists of further validation of the concept with simulated scenarios.

Combat Medics' Preparedness to Serve as Behavioral Health Extenders in Forward Environments.

INTRODUCTION: Future multidomain operational combat environments will require combat medics to play a larger role in managing behavioral health (BH) conditions in forward environments, as soldiers in small teams may have them as their sole medical support for extended periods of time. Previously they were not expected to serve in this role, and thus, they receive minimal BH training. It is unknown to what extent combat medics consider BH tasks as falling within their scope of practice and how often they engage with their soldiers currently related to BH. Qualitative research suggests that many medics feel inadequately prepared to handle BH problems. Our aim is to further assess medic attitudes and behaviors related to BH to better understand the landscape of medic preparedness to fill an expanded role. MATERIALS AND METHODS: Data from 292 medics were collected before their participation in the BH Guidelines for mEdic Assessment and Response training, a day-long training for medics expected to deploy to far-forward environments. We investigated whether combat medics engage with their soldiers in areas related to BH, the extent to which they consider BH-related tasks as part of their scope of practice, and how confident they feel engaging in various BH-related tasks. We explored associations between medics' attitudes related to BH scope of practice and confidence performing BH tasks with gender, rank, component (National Guard vs. Active Duty), work-related BH experience, having suicide training in the past year, and having ever sought help for BH. RESULTS: Results indicated that in the past month, 61.4% of medics discussed BH issues, 48.3% assessed BH problems, and 41.3% provided interventions for BH problems with at least one soldier in their unit. Assessment tasks were more frequently endorsed as falling within medic's scope of practice (75%-95%) than intervention tasks (62%-83%). More medics felt confident doing assessments (39%-49% moderately confident or greater) than providing interventions (31%-37% moderately confident or greater). Medics expressed highest confidence in assessing for suicide risk (49% moderate confidence or greater). Medics with a lot of prior BH work experience and non-commissioned officers (as compared to junior enlisted) reported greater confidence in most tasks. Receiving suicide training in the past year was associated with greater confidence assessing for suicide, as well as providing interventions for suicide, general BH problems, and substance abuse. CONCLUSIONS: Most medics agreed that numerous BH tasks fell within the scope of their work, but few felt confident engaging in those tasks. These findings support a need for additional training in BH-related tasks across the force. Exploring ways to provide medics BH-related work rotations would augment their general proficiency as first-line treatment providers for soldiers in combat units, and increased training in BH-related tasks should be studied to determine its ability to increase competency and confidence. If medics can learn to assess and recognize BH concerns before they escalate to needing specialty BH care, this could potentially reduce the burden on BH clinics, as well as strengthen the overall force.

Polycythemia Prevalence and Risk Factors in Pilots.

INTRODUCTION: Pilots are frequently exposed to thrombotic risk as a result of immobility from air travel. As hypoxemia is associated with secondary polycythemia, and polycythemia increases the risk of thrombosis, intermittent exposure to high-altitude hypoxic environments could escalate the risk of thrombosis in pilots. Our objectives were to find the prevalence of polycythemia in airplane pilots (primary outcome) and to assess associated risk factors of polycythemia (secondary outcome).METHODS: This study is a cross-sectional descriptive study. Data was collected from paper-based and computerized medical records of airplane pilots who applied for Class 1 Aviation Medical Certificate renewal at the Institute of Aviation Medicine, Royal Thai Air Force, Bangkok, Thailand, in 2018. The data was sampled by a simple random sampling technique.RESULTS: A total of 386 paper-based records were sampled. Of those, 29 (7.5%) of the pilots met polycythemia criteria. Spearman's correlation analysis showed a significant positive correlation between Body Mass Index (BMI) and hemoglobin (correlation coefficient = 0.127) and between BMI and hematocrit (correlation coefficient = 0.105). In multivariate logistic regression of each variable on polycythemia as defined by hemoglobin alone, piloting a non-pressurized aircraft was found to be an independent predictor of polycythemia (odds ratio = 4.3).DISCUSSION: The prevalence of polycythemia in airplane pilots was 7.5%. Operating a non-pressurized aircraft was a significant risk factor of polycythemia, and pilots with higher BMI were more likely to have increased red blood cell parameters.Thanapaisan P, Plaingam M, Manyanont S. Polycythemia prevalence and risk factors in pilots. Aerosp Med Hum Perform. 2024; 95(9):683-687.

Maternal and Fetal Health Risks Among Female Military Aviation Officers.

INTRODUCTION: Military aviation poses unique occupational risks, including exposures to intermittent hypoxia, high gravitational force, and toxic materials, in addition to circadian disruption, cosmic radiation, and ergonomic stressors also present in commercial flight. We sought to investigate whether a military aviation officer's career is associated with adverse maternal or fetal health outcomes.METHODS: We conducted a retrospective cohort study of female aviation and nonaviation officers in the Military Health System from October 2002 to December 2019. Exposure was identified as assignment of an aviation occupation code. Maternal and fetal health outcomes were identified by International Classification of Diseases codes from medical records. Regression analysis was used to estimate adjusted relative risks (aRR).RESULTS: Included in the study were 25,929 active-duty female officers, with 46,323 recorded pregnancies and 32,853 recorded deliveries; 2131 pregnancies were diagnosed in aviation officers. Pregnant aviation officers had a decreased risk of composite adverse pregnancy outcomes [aRR 0.82 (0.73-0.92)], including gestational diabetes [aRR 0.69 (0.57-0.85)] and gestational hypertension [aRR 0.84 (0.71-0.99)]. Pregnant aviation officers had a decreased risk of depression prior to delivery [aRR 0.43 (0.35-0.53)] and hyperemesis gravidarum [aRR 0.74 (0.57-0.96)], but an increased risk of placental complications [aRR 1.15 (1.02-1.30)] and fetal growth restriction [aRR 1.36 (1.16-1.60)].DISCUSSION: Pregnant military aviation officers have an increased risk of placental complications and fetal growth restriction in spite of a lower risk of gestational diabetes and gestational hypertension. Further research is needed to determine how flight-related occupations impact pregnancy.Stark CM, Sorensen IS, Royall M, Dorr M, Brown J, Dobson N, Salzman S, Susi A, Hisle-Gorman E, Huggins BH, Nylund CM. Maternal and fetal health risks among female military aviation officers. Aerosp Med Hum Perform. 2024; 95(9):675-682.

Longitudinal Changes in Dietary Supplement Use among United States Military Personnel: The US Military Dietary Supplement Use Study.

Previous studies investigating temporal changes in dietary supplement (DS) use have used representative samples but have not followed the same cohort over time. This study investigated longitudinal patterns of changes in DS use and factors associated with discontinuing DS use in a single group of active-duty United States military service members (SMs). SMs (n = 5778) completed two identical questionnaires on their DS use and demographic/lifestyle characteristics an average ± standard deviation 1.3 ± 0.2 years apart. Prevalences of reported DS use ≥1 times/week in the baseline (BL) and follow-up (FU) phases were: any DS, BL = 77%, FU = 78%; multivitamins/multiminerals (MVM), BL = 50%, FU = 48%; individual vitamins/minerals, BL = 33%, FU 35%; proteins/amino acids, BL = 43%, FU = 39%; combination products, BL = 44%, FU = 37%; prohormones, BL = 5%, FU = 4%; herbal products, BL = 23%, FU = 21%; joint health products, BL = 12%, FU = 12%; fish oils, BL = 25%, FU = 23%; other DSs, BL = 17%, FU = 17%. Among BL users, the proportions reporting use in the FU phase were: any DS 88%, MVM 74%, protein/amino acids 70%, individual vitamin/minerals 62%, combination products 62%, fish oils 61%, joint health products 57%, herbal products 50%, other DSs 50%, and prohormones 37%. Higher odds of discontinuing any DS use in the follow-up were associated with female gender, younger age, higher BMI, and less weekly resistance training. Overall, prevalence of DS use was relatively consistent in the two phases; however, the cohort changed their use patterns in the follow-up with some discontinuing use and others initiating use, thus maintaining use prevalence over the period. These findings have implications for repeated cross-sectional DS studies where different samples are followed over time.