Biomedical subjects

Robert N Potter

Publications and source records attributed to Robert N Potter.

6 recordsLinked to original sources

PubMed2006

Causes of sudden death in young female military recruits.

This study sought to examine the incidence of sudden death in a large, multiethnic cohort of young women. Approximately 852,300 women entered basic military training from 1977 to 2001. During this period, there were 15 sudden deaths in female recruits (median age 19 years, 73% African-American), occurring at a median of 25 days after arrival for training. Of the sudden deaths, 13 (81%) were due to reasons that may have been cardiac in origin. Presumed arrhythmic sudden death in the setting of a structurally normal heart was seen in 8 recruits (53%), and anomalous coronary origins were found in 2 recruits (13%). The mortality rate was 11.4 deaths per 100,000 recruit-years (95% confidence interval 6.9 to 18.9). The rate was significantly higher for African-American female recruits (risk ratio 10.2, p <0.001). Sudden death with a structurally normal heart was the leading cause of death in female recruits during military training.

Adolescent↗

PubMed2004

Sudden death in young adults: a 25-year review of autopsies in military recruits.

BACKGROUND: Sudden death among military recruits is a rare but devastating occurrence. Because extensive medical data are available on this cross-sectional and diverse population, identification of the underlying causes of sudden death may promote health care policy to reduce the incidence of sudden death. OBJECTIVE: To determine the causes of nontraumatic sudden death among a cohort of military recruits. DESIGN: Retrospective cohort study using demographic and autopsy data from the Department of Defense Recruit Mortality Registry. SETTING: Basic military training. PATIENTS: All nontraumatic sudden deaths from a monitored 6.3 million men and women age 18 to 35 years. MEASUREMENTS: Descriptive analysis, crude mortality rates of causes of sudden death, and frequency of events as a function of cause of death. RESULTS: Of 126 nontraumatic sudden deaths (rate, 13.0/100,000 recruit-years), 108 (86%) were related to exercise. The most common cause of sudden death was an identifiable cardiac abnormality (64 of 126 recruits [51%]); however, a substantial number of deaths remained unexplained (44 of 126 recruits [35%]). The predominant structural cardiac abnormalities were coronary artery abnormalities (39 of 64 recruits [61%]), myocarditis (13 of 64 recruits [20%]), and hypertrophic cardiomyopathy (8 of 64 recruits [13%]). An anomalous coronary artery accounted for one third (21 of 64 recruits) of the cases in this cohort, and, in each, the left coronary artery arose from the right (anterior) sinus of Valsalva, coursing between the pulmonary artery and aorta. LIMITATIONS: This cohort underwent a preenlistment screening program that included history and physical examination; this may have altered outcomes. CONCLUSIONS: Cardiac abnormalities are the leading identifiable cause of sudden death among military recruits; however, more than one third of sudden deaths remain unexplained after detailed medical investigation.

Adolescent↗

PubMed2004

Traumatic deaths during U.S. Armed Forces basic training, 1977-2001.

BACKGROUND: A Recruit Mortality Registry, linked to the Department of Defense Medical Mortality Registry, was created to provide comprehensive medical surveillance data for deaths occurring during enlisted basic military training. METHODS: Recruit deaths from 1977 through 2001 were identified and confirmed through redundant sources. Complete demographic, circumstantial, and medical information was sought for each case and recorded on an abstraction form. Mortality rates per 100,000 recruit-years were calculated by using recruit accession data from the Defense Manpower Data Center. RESULTS: There were 276 recruit deaths from 1977 through 2001 and age-specific recruit mortality rates were less than half of same-age U.S. civilian mortality rates. Only 28% (77 of 276) of recruit deaths were classified as traumatic (suicide, unintentional injury, and homicide), in comparison to three quarters in both the overall active duty military population and the U.S. civilian population (ages 15-34 years). The age-adjusted traumatic death rates were highest in the Army (four times higher than the Navy and Air Force, and 80% higher than the Marine Corps). The majority (60%) of traumatic deaths was due to suicide, followed by unintentional injuries (35%), and homicide (5%). The overall age-adjusted traumatic mortality rate was more than triple for men compared with women in all military services (rate ratio=3.9; p=0.01). CONCLUSIONS: There was a lower proportion of traumatic deaths in recruits compared to the overall active duty military population and same-age U.S. civilian population. This finding could be attributed to close supervision, emphasis on safety, and lack of access to alcohol and motor vehicles during recruit training.

Accidents↗

PubMed2004

Nontraumatic deaths during U.S. Armed Forces basic training, 1977-2001.

BACKGROUND: A Recruit Mortality Registry, linked to the Department of Defense Medical Mortality Registry, was created to provide comprehensive medical surveillance data for deaths occurring during enlisted basic military training. METHODS: Recruit deaths from 1977 through 2001 were identified and confirmed through redundant sources. Complete demographic, circumstantial, and medical information was sought for each case and recorded on an abstraction form. Mortality rates per 100,000 recruit-years were calculated by using recruit accession data from the Defense Manpower Data Center. RESULTS: There were 276 recruit deaths from 1977 through 2001 and age-specific recruit mortality rates were less than half of same-age U.S. civilian mortality rates. The majority (72%) of recruit deaths were classified as nontraumatic and 70% of these deaths (139 of 199) were related to exercise. Of the exercise-related deaths, 59 (42%) were cardiac deaths, and heat stress was a primary or contributory cause in at least 46 (33%). Infectious agents accounted for only 49 (25%) of the nontraumatic deaths. Nontraumatic death rates increased with age (rate ratio is 2.5 for 25+ v <25 years; p<0.001). The age- and gender-adjusted nontraumatic death rates were 2.6 times higher for African American than non-African American recruits (p<0.001). CONCLUSIONS: Although recruit mortality rates are lower than the same-age U.S. civilian population, preventive measures focused on reducing heat stress during exercise might be effective in decreasing the high proportion of exercise-related death. The availability of 25 years of comprehensive recruit mortality data will permit the ongoing evaluation of cause-of-death trends, effectiveness of preventive measures, and identification of emerging threats during basic military training.

Adolescent↗

PubMed2002

Nontraumatic exercise-related deaths in the U.S. military, 1996-1999.

We identified 215 exercise-related deaths in U.S. military personnel on active duty during 1996-1999. The most complete case information was for active duty Army personnel during 1998-1999, providing an exercise-related death rate of 4.3 per 100,000 person-years (41/963,000) and accounting for 6% of Army deaths (14 during physical fitness testing). The cause of death was confirmed by autopsy or clinical data for 85% of the cases. Arteriosclerotic coronary artery disease was the predominant cause of death for those 30 to 58 years of age. For age 17 to 34 years, 50% of deaths were attributable to preexisting heart disease (16% from coronary anomalies), 20% attributable to nontraumatic drowning, and 12% attributable to exertional heat illness, also a potential contributory factor in cardiac deaths. Most exercise-related deaths were related to running (60%), sports (14%), and swimming (13%). Improvements in health promotion, medical management, and stricter exclusion from inappropriate exercise (especially fitness test runs) could reduce these deaths.

Adolescent↗

PubMed2002

Musculoskeletal injuries in an Army airborne population.

To maintain operational readiness, military personnel engage in vigorous physical and training activities that carry risk for injury. A 1-year prospective cohort study, starting April 1996, was conducted at Fort Bragg, North Carolina among 1,965 members of the 82nd Airborne Division to quantify musculoskeletal injuries. Information collected included type of injury, site, circumstances, and resultant limited duty days. These soldiers suffered 508 overuse injuries (including 38 stress fractures), 1,415 traumatic injuries (including 100 fractures), and 101 unclassified injuries. Injury rates were 6.8% per soldier per month for traumatic injury and 2.4% for overuse injury (totaling 1.2 injuries per soldier per year). Injuries resulted in 22,041 limited duty days, averaging 11 days per injury and 13 days per soldier (4.5% of total workdays). Fractures and stress fractures/reactions produced the most days lost per case. Most of these injuries resulted from military-specific activities.

Adult↗