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At least 19 recordsLinked to original sources
PubMed2002

Are overweight and obese airmen at greater risk of discharge from the United States Air Force?

This study examined whether overweight or obesity results in greater discharge risk from basic military training (BMT) or during the first year of service in the U.S. Air Force (USAF). Participants were 32,144 male and female airmen who underwent BMT from August 1995 to August 1996 and were classified as underweight (body mass index [BMI] < 18), normal range (BMI = 18-24.9), overweight (BMI = 25-29.9), or obese (BMI > or = 30). Underweight airmen were 63% more likely and overweight airmen were 24% more likely to be medically discharged during BMT compared with individuals in the normal range. Underweight airmen were 22% more likely to be discharged within the first year of service compared with those in the normal range, whereas overweight airmen were 15% less likely to be discharged. These findings do not support overweight or obesity as being major causes for discharge from the USAF within the first year of active duty.

Adolescent↗
PubMed1988

Biochemical screening of airmen.

Starting in 1983, biochemical and hematological screening, including hemoglobin, hematocrit, mean cell volume, mean red cell hemoglobin concentration, white blood cell count, ESR, serum creatinine, cholesterol, triglycerides, ASAT (SGOT), ALAT (SGPT), G-GT and blood glucose, was performed in all Icelandic captains, copilots, flight engineers, and air traffic controllers. No hematological abnormalities were observed. One pilot had serum creatinine above 150 mmol.L-1; 48 airmen had serum cholesterol above 8.9 mmol.L-1; 15 had blood glucose above 7.9 mmol.L-1. The pilots had significantly lower serum triglycerides, ALAT, and ASAT than the captains. Fifty airmen had G-GT values above 50 IU.L-1. This group was urged to reconsider their alcohol habits and given medical and psychological advice as indicated. In this group the mean G-GT fell from 89 to 37 IU.L-1 during a period of approximately 2 years. No change in G-GT values was observed in those airmen who had a normal initial value. This study demonstrates the value of routine biochemical testing for airmen, particularly as regards blood glucose, serum cholesterol, and G-GT.

Adult↗
PubMed1984

Prognostic factors related to survival and complication-free times in airmen medically certified after coronary surgery.

This study was designed to identify prognostic factors for survival and complication-free times among airmen who had regained their medical certificate after coronary bypass surgery. Airmen who had petitioned the Federal Aviation Administration for a special issuance of medical certification to fly because they have had coronary bypass surgery were identified and followed retrospectively from 1970 to the end of 1980. There were 261 airmen in the study population. Demographic, medical, and prognostic information were collected on each airmen before and after surgery. Univariate and multivariate statistical methods were used in analysing the data. From the univariate analysis, presurgery diastolic blood pressure and coffee history, and postsurgery coffee history were identified as being related to complication-free time. Diagnosis for surgery, smoking history, and development of complications were identified as being related to survival after coronary bypass surgery. From the multivariate analysis, four prognostic factors: postsurgery serum cholesterol, number of grafts, postsurgery serum triglyceride, and postsurgery alcohol history were identified for complication-free time. It was concluded that using pre- and post-surgery information can help determine the long term survivors and those who will stay complication-free 11 years after coronary bypass surgery.

Aerospace Medicine↗
PubMed1982

Prevalence of selected pathology among currently certified active airmen.

It is the policy of the Federal Aviation Administration to medically certify individuals for flying who have medical deficiency or disease, provided such action does not compromise air safety. During recent years, for example, standards have been relaxed on contact lens use and medication has been allowed for control of hypertension. This descriptive epidemiologic study of the prevalence of pathology among active airmen as of Jan. 1, 1980--by major body system and for other selected pathologies of interest within the major body systems--used data from active computer files maintained by the Aeromedical Certification Branch of the Civil Aeromedical Institute in connection with the certification program. Some 350,701 (42%) active airmen require correction for some visual deficiency. Of this total, 20,058 are contact lens wearers. After eye pathology, cardiovascular and abdominal pathology represent the most prevalent medical conditions among active airmen (3.7% and 2.6% respectively). Overall, disease prevalence is greater among currently certified airmen than among previous groups studied. This increase in prevalence is probably a reflection of more liberal standards more than any other single factor.

Adult↗
PubMed1986

A review of the medical standards for civilian airmen. Synopsis of a two-year study.

This article summarizes the report of a comprehensive review by the American Medical Association (AMA) of the medical standards for civilian airmen. The present standards were promulgated by the Federal Aviation Administration in 1959; the alcoholism and cardiovascular standards were revised in 1982. The AMA report recommends new or revised standards for cardiovascular, mental and behavioral, visual, endocrine, respiratory, hematological, hearing and equilibrium, musculoskeletal, and nervous system disorders. It also provides guidance for the medical certification of airmen with conditions not covered specifically by the standards and recommends a new medical history and examination form for use by aviation medical examiners. Risk factors for the development of sudden incapacitating disease, such as coronary heart disease and stroke, receive special attention. Final standards will be developed by the Federal Aviation Administration.

Adult↗
PubMed1984

The 1980 and 1981 accident experience of civil airmen with selected visual pathology.

In studies of the 1974-76 accident experience of U.S. general aviation pilots with static physical defects, those with blindness or absence of either eye had significantly increased rates and ratios. A 1979 study found that 1,140 pilots with aphakia and 173 with artificial lens implants had significantly higher rates, but the monocular pilots did not. The present study examined the 1980-81 accident experience of 4,169 monocular pilots, 1,299 with amblyopia, 969 with aphakia, 285 with lens implants, 118 with a history of diplopia, 1,269 with a tropia, 2,601 with hyperphoria greater than 1 diopter, and 2,711 with esophoria or exophoria greater than 6 diopters by class of medical certificate held. The numbers were too small for statistical treatment, but first- and second-class medical certificate holders, who often have more accidents per 1,000 airmen, consistently had progressively lower accident rates per 100,000 hours. Monocular, aphakic, lens implant, and amblyopic accident airmen had higher accident rates than did the total airman population.

Accidents, Aviation↗
PubMed1977

Oral health of airmen: analysis of panoramic radiographic and Polaroid photographic survey.

An oral health survey of 5,783 basic airmen was conducted. In this study, emphasis was placed on detection of periodontal disease. Numerous pathologic conditions were found and recorded. In addition, the presence or absence of evidence of previous dental care and its nature were reported. We believe that panoramic radiographs and Polaroid intraoral photographs have merit in mass screening of large numbers of persons for the detection of periodontal disease. Through the use of these diagnostic aids, various degrees of periodontal disease could be diagnosed. Other pathologic entities that might have been missed with routine dental radiographs were observed. However, although the diagnostic aids used in this report are a helpful adjunct, in their present state of development they should not be used to replace standard dental radiographs and clinical examination.

Aerospace Medicine↗
PubMedDate not supplied

Medical standards for airmen and air traffic controllers.

This article details aeromedical certification requirements for first-, second-, and third-class airmen and reviews special issuance, including the administrative process regarding disease-specific special issuance.

Aerospace Medicine↗
PubMed1982

The prevalence of visual deficiencies among 1979 general aviation accident airmen.

Analyses of the accident experience of pilots who were monocular, did not meet vision standards, had color vision defects and no operational restrictions, or wore contact lenses have shown higher-than-expected accident experience in previous studies. However, no causal role had been assigned. In the present study of accidents during 1979, the pilots with aphakia and artificial lens implants and the total eye pathology population had significantly higher accident rates, but the monocular pilots did not. Again, no causal role had been ascribe. There are still unresolved questions about the consistent operational performance of monocular pilots, those who are not fully corrected to 20/20 distant visual acuity bilaterally, airmen with near vision deficiencies only who are not required to wear corrective glasses, those without fusion, and several with appreciable pathology who have 20/20 corrected central visual acuity, but about whom we know very little concerning their dynamic, peripheral, depth, or accommodative function.

Accidents, Aviation↗
PubMed1980

Eustachian tube function in selection of airmen.

A comprehensive study of Eustachian tube function in 84 aspirants accepted for flight training was made. Using a pressure chamber, both static and dynamic pressure changes, as in ascent and descent, were applied to test the tubal pressure equilibrating capacity in the sitting position. While all 84 were otologically healthy, a wide range in the pressure equilibrating capacity was found--20% could not equilibrate static over- and underpressures of 10 cm H2O completely, 8% could not equilibrate at all during simulated descent, 3 subjects reported acute vertigo during simulated ascent in combination with high unilateral middle ear pressure. Asymmetry between ears of single subjects in pressure equilibrating capacity was also found to a large extent. It was not possible to identify subjects with poor equilibrating capacity by simple tests like Valsalva's or Toynbee's manoeuvres. The results may indicate that today's criteria for Eustachian tube function in the selection of airmen can be made more efficient.

Adolescent↗
PubMed1999

The effect of high altitude on platelet counts, thrombopoietin and erythropoietin levels in young Bolivian airmen visiting the Andes.

Recognition of thrombosis as a complication of exposure to high altitude has stimulated interest in rheological changes resulting from hypobaric hypoxia. Previous studies of platelet counts at high altitude have yielded conflicting results and have not been studied in conjunction with potential mediating cytokines. We studied the effects of high-altitude exposure on platelet numbers, thrombopoietin (tpo) and erythropoietin (epo) levels in man. A group of 28 volunteers from the Bolivian Airforce stationed at Santa Cruz (600 m altitude) were studied 48 h and 1 week after their ascent to La Paz (3600 m). In addition 105 volunteers based at Santa Cruz for at least 1 year were compared with 175 age- and sex-matched residents at El Alto (4200 m). Platelet counts were measured immediately after sampling and serum samples assayed for tpo and epo. In the ascending group, mean platelet counts were 251 x 10(9), 367 x 10(9) and 398 x10 (9)/l at 600 m and following 48 h and 1 week at 3600 m respectively. Mean tpo levels were 132.5, 76 and 92 pg/ml with epo values of 2.98, 11.6 and 7.9 mIU/ml respectively. In the resident populations mean platelet counts were 271 x 10(9)/l in the low- and 471 x 10(9)/l in the high-altitude groups. Mean tpo and epo levels measured 69.3 pg/ml and 4.5 mIU/ml respectively at 600 m and 58.5 pg/ml and 5.1 mIU/ml at 4200 m. In conclusion we have demonstrated a significant and sustained elevation in platelet numbers within 48 h of ascent to high altitude. Our findings do not support a role for tpo as a mediator of the increased platelet count. However, these data do not discount epo as a potential candidate.

Adaptation, Physiological↗