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Studies

Welcome to the Military Health System Studies Inventory Tool (MSIT). Military Health System (MHS) data are used by Department of Defense, Veterans Administration, and academic health professionals and scientists to implement health care studies. These studies reflect the MHS interest to rigorously assess and improve our beneficiaries’ access to the high quality health care services they need. Additionally, these studies are frequently used to develop or improve MHS policy and often adopt useful, relevant comparisons to the national health care experience.

The MSIT allows easy review of recent studies that are either conducted or sponsored by the MHS, or accomplished using datasets developed or maintained by the Defense Health Agency for administrative, operational, or research purposes. The studies within this website represent important contributions of the MHS to the national health care dialogue and reflect our capacity to tackle the challenging issues needed to support evidence-informed health policy. Thank you for your interest in them.

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Delayed presentations of popliteal artery entrapment syndrome in a middle-aged military population.

Study

Abstract

Popliteal artery entrapment syndrome (PAES) is a rare but significant cause of disability usually diagnosed in young, healthy adults. Advancements in diagnostic imaging modalities have prompted a current report of our recent experience with PAES in a middle-aged military population at the Walter Reed National Military Medical Center. The addition of computed tomographic angiography (CTA) and magnetic resonance angiography (MRA) permit accurate and facile diagnosis of this complex syndrome.

  • Publication Status: Published
  • Sponsoring Organization: Defense Health Agency (formerly TRICARE Management Activity)
  • Sponsoring Office: Walter Reed National Military Medical Center/Uniformed Services University of Health Sciences
  • Congressionally Mandated: No
  • Funding Source: Defense Health Agency (formerly TRICARE Management Activity)
  • Release Date/Publication: November 01, 2013
  • Citation: Radowsky J, Patel B, Fox CJ. Delayed presentations of popliteal artery entrapment syndrome in a middle-aged military population. Ann Vasc Surg. 2013 Nov;27(8):1184.e1-6.

Deployment-related injury and posttraumatic stress disorder in US military personnel.

Study

Abstract

BACKGROUND: The current military conflicts in Iraq and Afghanistan have resulted in the most US casualties since the Vietnam War. Previous research on the association between deployment-related injury and posttraumatic stress disorder (PTSD) has yielded mixed results. OBJECTIVES: To examine the effect of battle injury (BI) relative to non-battle injury (NBI) on the manifestation of PTSD symptoms in military personnel and to assess the demographic, injury-specific, and pre-injury factors associated with PTSD following a BI. PATIENTS AND METHODS: A total of 3403 personnel with deployment-related injury (1777 BI and 1626 NBI) were identified from the Expeditionary Medical Encounter Database. Records were electronically matched to Post-Deployment Health Assessment (PDHA) data completed 1-6 months post-injury. The PTSD screening outcome was identified using a four-item screening tool on the PDHA. RESULTS: Compared to those with NBI, personnel with BI had more severe injuries, reported higher levels of combat exposure, and had higher rates of positive PTSD screen. After adjusting for covariates, personnel with BI were twice as likely to screen positive for PTSD compared to those with NBI (odds ratio [OR], 2.10; 95% confidence interval [CI], 1.60-2.75). In multivariable analysis among battle-injured personnel only, moderate and serious-severe injury (OR, 1.49; 95% CI, 1.12-2.00 and OR, 1.64; 95% CI, 1.01-2.68, respectively), previous mental health diagnosis within 1 year of deployment (OR, 2.69; 95% CI, 1.50-4.81), and previous BI (OR, 1.96; 95% CI, 1.22-3.16) predicted a positive PTSD screen. CONCLUSIONS: Military personnel with BI have increased odds of positive PTSD screen following combat deployment compared to those with NBI. Post-deployment health questionnaires may benefit from questions that specifically address whether service members experienced an injury during combat.

  • Publication Status: Published
  • Sponsoring Organization: Navy
  • Sponsoring Office:
  • Congressionally Mandated: No
  • Funding Source: Undetermined
  • Release Date/Publication: November 01, 2013
  • Citation: Macgregor AJ, Tang JJ, Dougherty AL, Galarneau MR. Deployment-related injury and posttraumatic stress disorder in US military personnel. Injury. 2013 Nov;44(11):1458-64.

The association of predeployment and deployment-related factors on dimensions of postdeployment wellness in U.S. military service members.

Study

Abstract

PURPOSE: To assess the effects of predeployment and deployment-related factors on dimensions of wellness following deployment. DESIGN: Prospective longitudinal study. The dependent variable was dimensions of wellness. Independent variables were measured in terms of modifiable, nonmodifiable, and military factors, such as sex, race/ethnicity, service branch, smoking status, and combat experience. SETTING: A large military cohort participating in the Millennium Cohort Study. SUBJECTS: Included 10,228 participants who deployed in support of the operations in Iraq and Afghanistan. MEASURES: Dimensions of wellness were measured by using standardized instruments assessing self-reported physical health, mental health, and stress. Covariates were measured by using self-reported and electronic data. ANALYSIS: Factors of postdeployment wellness were assessed by using ordinal logistic regression. RESULTS: Most participants (78.7%) were categorized as "moderately well" post deployment. Significant modifiable predeployment predictors of postdeployment wellness included normal/underweight body mass index (odds ratio [OR] = 1.72, p < .05). Military factors significantly associated with wellness included not experiencing combat (OR = .56, p < .05), member of Air Force (OR = 2.02, p < .05) or Navy/Coast Guard (OR = 1.47, p < .05), and combat specialist occupation (OR = 1.22, p < .05). CONCLUSION: Multiple modifiable factors associated with postdeployment wellness were identified, which may help inform medical and military leadership on potential strategies to ensure a well force. Those trained in combat roles were more likely to be well post deployment though this apparent benefit was not conferred onto those reporting combat experiences.

  • Publication Status: Published
  • Sponsoring Organization: Navy
  • Sponsoring Office:
  • Congressionally Mandated: No
  • Funding Source: Undetermined
  • Release Date/Publication: November 01, 2013
  • Citation: Bagnell ME, LeardMann CA, McMaster HS, Boyko EJ, et. al. The association of predeployment and deployment-related factors on dimensions of postdeployment wellness in U.S. military service members. Am J Health Promot. 2013 Nov-Dec;28(2):e56-66.

Surveillance snapshot: Bacterial meningitis among beneficiaries of the military health system, 1998-2013.

Study

Abstract

From 1998 to 2013 (partial year), 3,782 beneficiaries of the Military Health System (MHS) were diagnosed as cases of bacterial meningitis. Cases were ascertained from diagnoses recorded in special electronic reports of meningococcal meningitis (a Reportable Medical Event in the MHS) or in records of inpatient hospital stays in which bacterial meningitis was documented in the primary or secondary diagnostic position. Among the three types of benefi ciary groups, the proportions of meningitis cases by bacterial type varied. In active and Reserve/Guard component service members, meningococcal meningitis was the most commonly documented specifi ed type of bacterial meningitis. Among all other benefi ciaries (e.g., spouses, children, retirees, etc.) streptococcal meningitis was the most commonly specifi ed type of bacterial meningitis. Meningococcal meningitis was diagnosed among 91 active component service members, 14 Reserve/Guard service members, and 251 other benefi ciaries (Figure 2). Th e overall rate in active component service members was 0.41 per 100,000 person-years. The incidence rate was relatively stable from 1998 to 2008, and then varied greatly from 2009 through 2013. In 2009 and 2011, there were no cases of meningococcal meningitis in active component service members. During the entire surveillance period, there were documented an additional 266 cases of meningococcal disease that were not recorded as meningitis. These included meningococcemia (n=150), carditis (n=13), and other specified and unspecifi ed meningococcal infections (n=103). These cases affected 38 active component members, 6 Reserve and Guard members, and 222 other benefi ciaries.

  • Publication Status: Published
  • Sponsoring Organization: Defense Health Agency (formerly TRICARE Management Activity)
  • Sponsoring Office: Armed Forces Health Surveillance Center
  • Congressionally Mandated: No
  • Funding Source: Defense Health Agency (formerly TRICARE Management Activity)
  • Release Date/Publication: November 01, 2013
  • Citation: AFHSC. Surveillance snapshot: Bacterial meningitis among beneficiaries of the military health system, 1998-2013. MSMR. 2013 Nov;20(11):15.

Obesity and the US military family.

Study

Abstract

OBJECTIVE: This review discusses the current knowledge and future directions regarding obesity within the US military family (i.e., active-duty servicemembers, as well as military spouses, children, retirees, and veterans). The increasing rates of overweight and obesity within the US military adversely impact military readiness, limit recruitment, and place a significant financial burden on the Department of Defense. DESIGN AND METHODS: The following topics are reviewed: 1) The prevalence of and the financial, physical, and psychological costs associated with overweight in military communities; 2) military weight regulations, and challenges faced by the military family related to overweight and disordered eating; 3) the continued need for rigorous program evaluations and new intervention development. RESULTS: Overweight and its associated sequelae impact the entire military family. Military families share many similarities with their civilian counterparts, but they face unique challenges (e.g., stress related to deployments and relocations). Although the military has weight management resources, there is an urgent need for rigorous program evaluation and the development of enhanced obesity prevention programs across the lifespan of the military family-several of which are proposed herein. CONCLUSIONS: Interdisciplinary and collaborative research efforts and team-based interventions will continue to inform understanding of obesity treatment and prevention within military and civilian populations.

  • Publication Status: Published
  • Sponsoring Organization: Defense Health Agency (formerly TRICARE Management Activity)
  • Sponsoring Office: Uniformed Services University of Health Sciences
  • Congressionally Mandated: No
  • Funding Source: Defense Health Agency (formerly TRICARE Management Activity)
  • Release Date/Publication: November 01, 2013
  • Citation: Tanofsky-Kraff M, Sbrocco T, Theim KR, Cohen LA, Mackey ER, Stice E, Henderson JL, McCreight SJ, Bryant EJ, Stephens MB. Obesity and the US military family. Obesity (Silver Spring). 2013 Nov;21(11):2205-20.

Syncope among U.S. Air Force basic military trainees, August 2012-July 2013.

Study

Abstract

Syncope is a common event with many possible etiologies, ranging from benign to severe. Syncopal episodes of any origin, however, may result in traumatic injury due to postural collapse. Based on the prevalence of internal and external stressors during training, basic military trainees may be at increased risk for syncope. Between 1 August 2012 and 31 July 2013, there were 112 unique individuals who experienced syncopal or pre-syncopal events among basic military trainees at Joint Base San Antonio-Lackland, Texas, the only basic training site in the U.S. Air Force. The overall rate was 19.6 cases per 1,000 person-years (18.4 and 36.1 per 1,000 person-years in males and females, respectively). Based upon the findings of electronic chart review of the 112 cases, a majority of events occurred either during or immediately after exercise (n=38) or during a blood draw, immunization, or laceration repair (n=22). The most common etiologies were judged to be neurocardiogenic (n=54) and orthostatic hypotension (n=40), and two cases were attributed to cardiovascular disease. These findings support current preventive measures, including anemia screening during medical in-processing, an emphasis on hydration throughout training, and a padded floor in the trainee vaccination bay.

  • Publication Status: Published
  • Sponsoring Organization: Defense Health Agency (formerly TRICARE Management Activity)
  • Sponsoring Office: Armed Forces Health Surveillance Center
  • Congressionally Mandated: No
  • Funding Source: Undetermined
  • Release Date/Publication: November 01, 2013
  • Citation: Webber BJ, Cropper TL, Federinko SP. Syncope among U.S. Air Force basic military trainees, August 2012-July 2013. MSMR. 2013 Nov;20(11):2-4.

Military report more complementary and alternative medicine use than civilians

Study

Abstract

OBJECTIVES: The study objective was to estimate complementary and alternative medicine (CAM) use among active duty military and compare data with civilian use. DESIGN: A global survey on CAM use in the 12 previous months was conducted. Final participants (16,146) were stratified by gender, service, region, and pay grade. Analysis included prevalence of CAM use, demographic and lifestyle characteristics. RESULTS: Approximately 45% of respondents reported using at least one type of CAM therapy. Most commonly used therapies were as follows: prayer for one's own health (24.4%), massage therapy (14.1%), and relaxation techniques (10.8%). After exclusion of prayer for one's own health, adjusting to the 2000 U.S. census, overall CAM use in the military (44.5%) was higher than that in comparable civilian surveys (36.0% and 38.3%). CONCLUSIONS: Military personnel reported using three CAM stress-reduction therapies at 2.5-7 times the rate of civilians. Among the military, high utilization of CAM practices that reduce stress may serve as markers for practitioners assessing an individual's health and well-being

  • Publication Status: Published
  • Sponsoring Organization: Defense Health Agency (formerly TRICARE Management Activity)
  • Sponsoring Office: Defense Health Agency (formerly TRICARE Management Activity)
  • Congressionally Mandated: No
  • Funding Source: Army
  • Release Date/Publication: June 01, 2013
  • Citation: Military report more complementary and alternative medicine use than civilians. Goertz C, Marriott BP, Finch MD, Bray RM, Williams TV, Hourani LL, Hadden LS, Colleran HL, Jonas WB.J Altern Complement Med. 2013 Jun;19(6):509-17

Neuropsychiatric events in varenicline and nicotine replacement patch users in the Military Health System.

Study

Abstract

To determine the rate ratio of neuropsychiatric hospitalizations in new users of varenicline compared to new users of nicotine replacement therapy (NRT) patch in the Military Health System (MHS). DESIGN, SETTING AND PARTICIPANTS: Varenicline (n = 19,933) and NRT patch (n = 15,867) users who initiated therapy from 1 August 2006 to 31 August 2007 within the MHS were included in this retrospective cohort study. After matching according to propensity scores, 10,814 users remained in each cohort. The study population included those with and without a history of neuropsychiatric disease. MEASUREMENTS: Patients were followed for neuropsychiatric hospitalizations defined by primary neuropsychiatric discharge diagnosis using ICD-9 codes from in-patient administrative claims. Hazard ratios (HR) and 95% confidence intervals (CI) were estimated after propensity score matching on exposure for socio-demographic factors, health-care utilization, comorbidities, medication history and neuropsychiatric history. FINDINGS: There was no increase in the rate of neuropsychiatric hospitalizations in patients treated with varenicline compared to NRT patch when followed for 30 days (propensity-score matched HR = 1.14, 95% CI: 0.56-2.34). Results were similar after 60 days of follow-up. CONCLUSIONS: There does not appear to be an increase in neuropsychiatric hospitalizations with varenicline compared with nicotine replacement therapy patch over 30 or 60 days after drug initiation

  • Publication Status: Published
  • Sponsoring Organization: Army
  • Sponsoring Office: DoD Pharmacoeconomic Center
  • Congressionally Mandated: No
  • Funding Source: Army
  • Release Date/Publication: January 01, 2013
  • Citation: Meyer TE, Taylor LG, Xie S, Graham DJ, Mosholder AD, Williams JR, Moeny D, Ouellet-Hellstrom RP, Coster TS. Neuropsychiatric events in varenicline and nicotine replacement patch users in the Military Health System. Addiction. 2013 Jan;108(1):203-10.

Low vitamin D status and suicide: a case-control study of active duty military service members.

Study

Abstract

OBJECTIVE: Considering that epidemiological studies show that suicide rates in many countries are highest in the spring when vitamin D status is lowest, and that low vitamin D status can affect brain function, we sought to evaluate if a low level of 25-hydroxyvitamin D [25(OH)D] could be a predisposing factor for suicide. METHOD: We conducted a prospective, nested, case-control study using serum samples stored in the Department of Defense Serum Repository. Participants were previously deployed active duty US military personnel (2002-2008) who had a recent archived serum sample available for analysis. Vitamin D status was estimated by measuring 25(OH) D levels in serum samples drawn within 24 months of the suicide. Each verified suicide case (n = 495) was matched to a control (n = 495) by rank, age and sex. We calculated odds ratio of suicide associated with categorical levels (octiles) of 25(OH) D, adjusted by season of serum collection. FINDINGS: More than 30% of all subjects had 25(OH)D values below 20 ng/mL. Although mean serum 25(OH)D concentrations did not differ between suicide cases and controls, risk estimates indicated that subjects in the lowest octile of season-adjusted 25(OH)D (<15.5 ng/mL) had the highest risk of suicide, with subjects in the subsequent higher octiles showing approximately the same level of decreased risk (combined odds ratio compared to lowest octile = 0.49; 95% C.I.: 0.315-0.768). CONCLUSIONS: Low vitamin D status is common in active duty service members. The lowest 25(OH)D levels are associated with an increased risk for suicide. Future studies could determine if additional sunlight exposure and vitamin D supplementation might reduce suicide by increasing 25(OH) D levels.

  • Publication Status: Published
  • Sponsoring Organization: Defense Health Agency (formerly TRICARE Management Activity)
  • Sponsoring Office: Uniformed Services University of Health Sciences
  • Congressionally Mandated: No
  • Funding Source: Government, academic, or industry source other than Federal Government
  • Release Date/Publication: January 01, 2013
  • Citation: Umhau JC, George DT, Heaney RP, Lewis MD, Ursano RJ, Heilig M, Hibbeln JR, Schwandt ML. Low vitamin D status and suicide: a case-control study of active duty military service members. PLoS One. 2013;8(1):e51543.

Is military deployment a risk factor for maternal depression?

Study

Abstract

BACKGROUND: Maternal depression is a common condition among new mothers that can be associated with poor maternal health and negative consequences on infant health. Little research has been conducted to examine maternal depression, especially among military mothers, where unique conditions often exist. Using data from a large military cohort, this study prospectively examined the relationship between deployment experience before and after childbirth and maternal depression among U.S. service women. METHODS: The study included 1,660 female Millennium Cohort participants who gave birth during active duty service and completed baseline and follow-up questionnaires between 2001 and 2008. Maternal depression was assessed at follow-up using Primary Care Evaluation of Mental Disorders Patient Health Questionnaire criteria. RESULTS: Deployment before childbirth, regardless of combat experience, and deployment without combat experience after childbirth did not increase the risk of maternal depression. Women who deployed and reported combat experience after childbirth were at increased risk for maternal depression compared with nondeployed women who gave birth (adjusted odds ratio [OR] 2.01, 95% confidence interval [CI] 1.17-3.43). Among the subgroup of female combat deployers, however, women who gave birth did not have a significantly increased risk for depression compared with those who did not give birth. CONCLUSIONS: Military women who deployed with combatlike experiences after childbirth were at increased risk for postdeployment maternal depression. The risk, however, appeared primarily related to combat rather than childbirth-related experiences.

  • Publication Status: Published
  • Sponsoring Organization: Navy
  • Sponsoring Office:
  • Congressionally Mandated: No
  • Funding Source: Undetermined
  • Release Date/Publication: January 01, 2013
  • Citation: Nguyen S, Leardmann CA, Smith B, Conlin AM, Slymen DJ, Hooper TI, et. al. Is military deployment a risk factor for maternal depression? J Womens Health (Larchmt). 2013 Jan;22(1):9-18.

Effects of Iraq/Afghanistan deployments on major depression and substance use disorder: analysis of active duty personnel in the US military

Study

Abstract

OBJECTIVES: Our objective was to analyze the association between deployment characteristics and diagnostic rates for major depression and substance use disorder among active duty personnel. METHODS: Using active duty personnel serving between 2001 and 2006 (n = 678,382) and deployment information from the Contingent Tracking System, we identified individuals diagnosed with substance use disorders and major depression from TRICARE health records. We performed logistic regression analysis to assess the effect of deployment location and length on these diagnostic rates. RESULTS: Increased odds of diagnosis with both conditions were associated with deployment to Iraq or Afghanistan compared with nondeployed personnel and with Army and Marine Corps personnel compared with Navy and Air Force personnel. Increases in the likelihood of either diagnosis with deployment length were only observed among Army personnel. CONCLUSIONS: There were increased substance use disorders and major depression across services associated with combat conditions. It would be important to assess whether the public health system has adequate resources to handle the increasing need of mental health services in this population.

  • Publication Status: Published
  • Sponsoring Organization: Defense Health Agency (formerly TRICARE Management Activity)
  • Sponsoring Office: Defense Health Agency (formerly TRICARE Management Activity)
  • Congressionally Mandated: No
  • Funding Source: Navy
  • Release Date/Publication: March 01, 2013
  • Citation: Shen YC, Arkes J, Williams TV. Effects of Iraq/Afghanistan deployments on major depression and substance use disorder: analysis of active duty personnel in the US military. Am J Public Health. 2012 Mar;102 Suppl 1:S80-7.

The association between US Army enlistment waivers and subsequent behavioral and social health outcomes and attrition from service

Study

Abstract

Soldiers granted enlistment waivers for medical concerns, misconduct, or positive alcohol/drug tests may or may not be associated with an increased likelihood of negative behavioral outcomes. Soldiers in the population examined (n = 8,943) who were granted enlistment waivers from 2003 to 2008 were significantly more likely to subsequently be screened for alcohol/substance abuse, test positive for illicit substances, or receive an Army separation for behavioral misconduct. These associations were highest among Soldiers granted waivers for nonlawful alcohol/drug violations. Soldiers granted waivers for felony offenses and serious nontraffic violations were significantly less likely to separate from the Army compared with Soldiers not granted enlistment waivers.

  • Publication Status: Published
  • Sponsoring Organization: Army
  • Sponsoring Office: US Army Institute of Public Health
  • Congressionally Mandated: No
  • Funding Source: Army
  • Release Date/Publication: March 01, 2013
  • Citation: Gallaway MS, Bell MR, Lagana-Riordan C, Fink DS, Meyer CE, Millikan AM. The association between US Army enlistment waivers and subsequent behavioral and social health outcomes and attrition from service. Mil Med. 2013 Mar;178(3):261-6.

Suicide incidence and risk factors in an active duty US military population.

Study

Abstract

OBJECTIVES: The goal of this study was to investigate and identify risk factors for suicide among all active duty members of the US military during 2005 or 2007. METHODS: The study used a cross-sectional design and included the entire active duty military population. Study sample sizes were 2,064,183 for 2005 and 1,981,810 for 2007. Logistic regression models were used. RESULTS: Suicide rates for all services increased during this period. Mental health diagnoses, mental health visits, selective serotonin reuptake inhibitors (SSRIs), sleep prescriptions, reduction in rank, enlisted rank, and separation or divorce were associated with suicides. Deployments to Operation Enduring Freedom or Operation Iraqi Freedom were also associated with elevated odds ratios for all services in the 2007 population and for the Army in 2005. CONCLUSIONS: Additional research needs to address the increasing rates of suicide in active duty personnel. This should include careful evaluation of suicide prevention programs and the possible increase in risk associated with SSRIs and other mental health drugs, as well as the possible impact of shorter deployments, age, mental health diagnoses, and relationship problems

  • Publication Status: Published
  • Sponsoring Organization: Defense Health Agency (formerly TRICARE Management Activity)
  • Sponsoring Office: Defense Health Agency (formerly TRICARE Management Activity)
  • Congressionally Mandated: No
  • Funding Source: Defense Health Agency (formerly TRICARE Management Activity)
  • Release Date/Publication: March 01, 2013
  • Citation: Hyman J, Ireland R, Frost L, Cottrell L. Suicide incidence and risk factors in an active duty US military population. Am J Public Health. 2012 Mar;102 Suppl 1:S138-46.

Epidemiology of Clostridium difficile infection among active duty United States military personnel (1998-2010).

Study

Abstract

BACKGROUND: Clostridium difficile associated disease (CDAD) has risen in incidence and the experience in the US military has not been described. METHODS: We evaluated the U.S. military's database and identified CDAD cases and demographic characteristics among affected military personnel from 1998 to 2010. RESULTS: 2,423 cases were identified. CDAD incidence was 13.2 cases (95% CI: 12.7-13.7) per 100 K p-yr and increased over study years. CA-CDAD and HA-CDAD incidence was 5.5 (95% CI: 5.2, 5.9) per 100 K p-y and 1.3 (95% CI: 1.2, 1.4) per 1,000 hospitalizations respectively. Females comprised a larger proportion of CA-CDAD than HA-CDAD (25.5% vs. 19.3%; p < 0.001) cases as did Air Force service (29% vs. 23.4%; p < 0.01). On multivariate analysis female gender, Coast Guard or Air Force service, and a married status was associated with CA-CDAD whereas Male gender and Marine Corps service were associated with HA-CDAD cases. CONCLUSIONS: CDAD has increased among military personnel, with female cases more likely to be community associated. Gender, marital status and branch of service had the strongest association with CDAD subtype. Further work is needed to evaluate the epidemiologic factors that have led to these increased rates in otherwise low-risk populations and associated sequelae.

  • Publication Status: Published
  • Sponsoring Organization: Defense Health Agency (formerly TRICARE Management Activity)
  • Sponsoring Office: Uniformed Services University of Health Sciences/Armed Forces Health Surveillance Center
  • Congressionally Mandated: No
  • Funding Source: Agency, office or organization under authority of the Sec Def (not affiliated to Army, Navy, or Air Force)
  • Release Date/Publication: December 01, 2013
  • Citation: Gutiérrez RL, Riddle MS, Porter CK. Epidemiology of Clostridium difficile infection among active duty United States military personnel (1998-2010). BMC Infect Dis. 2013 Dec 28;13:609.

Trends in the diagnosis of SLAP lesions in the US military.

Study

Abstract

PURPOSE: Shoulder pathology, particularly SLAP (superior labrum anterior-posterior) lesions, is prevalent in overhead athletes and physically active individuals. The aim of this study is to quantify the burden of SLAP lesions in the military and establish risk factors for diagnosis. METHODS: A retrospective analysis of all service members diagnosed with a SLAP lesion (International Classification of Disease, Ninth Revision code 840.70) in the Defense Medical Epidemiological Database between 2002 and 2009 was performed. Available epidemiological risk factors including age, sex, race, military rank, and branch of service were evaluated using multivariate Poisson regression analysis, and cumulative and subgroup incidence rates were calculated. RESULTS: During the study period, approximately 23,632 SLAP lesions were diagnosed among a population at risk of 11,082,738, resulting in an adjusted incidence rate of 2.13 per 1,000 person-years. The adjusted annual incidence rate for SLAP lesions increased from 0.31 cases per 1,000 person-years in 2002 to 1.88 cases per 1,000 person-years in 2009, with an average annual increase of 21.2 % (95 % CI 20.7 %, 22.0 %, p < 0.0001) during the study period. Age, sex, race, branch of military service, and military rank were independent risk factors associated with the incidence rate of SLAP lesion (p < 0.01). Male service members were over twofold more likely (IRR, 2.12; 95 % CI 2.01, 2.23) to sustain a SLAP lesion when compared with females. Increasing age category was associated with a statistically significant increase in the incidence rate for SLAP lesions in the present study (p < 0.001). After controlling for the other variables, those individuals of white race, enlisted ranks, or Marine Corps service experienced the highest incidence rates for SLAP. CONCLUSION: This is the first study to establish the epidemiology of SLAP lesions within an active military cohort in the American population. Sex, age, race, military rank, and branch of military service were all independently associated with the incidence rate of SLAP lesions in this physically active population at high risk for shoulder injury. LEVEL OF EVIDENCE: II.

  • Publication Status: Published
  • Sponsoring Organization: Army
  • Sponsoring Office:
  • Congressionally Mandated: No
  • Funding Source: Undetermined
  • Release Date/Publication: December 01, 2013
  • Citation: Waterman BR, Cameron KL, Hsiao M, Langston JR, Clark NJ, Owens BD. Trends in the diagnosis of SLAP lesions in the US military. Knee Surg Sports Traumatol Arthrosc. 2013 Dec 10.
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