Streamlining Flight Waivers for Anemia in Air Force Basic Trainees

All Air Force basic military trainees undergo anemia screening during their initial medical evaluation. Anemia, defined by low hemoglobin levels, can impair oxygen delivery, leading to fatigue, weakness, and in severe cases, organ failure. Even asymptomatic anemia is concerning in the Air Force because of reduced oxygen levels at high altitudes. The Air Force Aerospace waiver guidelines currently use hemoglobin lower-limit-of-normal (LLN) values based on race and sex, following Beutler and Waalen's 2006 standards. However, race-based classifications lack biological relevance and can introduce bias. In contrast, World Health Organization (WHO) guidelines use non-race-based criteria, defining anemia as hemoglobin less than 13.0 g/dL for men and less than 12.0 g/dL for nonpregnant women. This project aimed to reduce the need for hematology referrals for uncomplicated anemia by adopting a race-neutral algorithm and creating specific screening and treatment algorithms. It also aimed to reduce time away from training and reduce time in medical hold for Air Force basic trainees.

New screening algorithms for male and female trainees were developed to differentiate uncomplicated anemia from cases needing specialist care. Initial screening involved hemoglobin and hematocrit (H/H) testing. If hematocrit was 40% or greater for males or 35% or greater for females, no further action was required. If below these thresholds, hemoglobin was assessed per WHO criteria. Marginally low hemoglobin levels prompted retesting after 3 to 4 weeks if recent illness was noted. Persistent anemia triggered further testing. Trainees with reversible causes received treatment by their primary care physician, while those with persistent or severe anemia were referred for specialty evaluation and given aerospace waivers as indicated.

Between September 1, 2024, and January 15, 2025, 162 trainees were referred from Lackland Air Force Base to Brooke Army Medical Center Hematology clinic for anemia evaluation. Using the new algorithm, 75 trainees were cleared through chart review, avoiding in-person appointments. Of the 87 trainees seen in the clinic, 61 required additional follow-up. The new algorithms and referral process reduced medical hold times, saving approximately $10,950 in appointment costs and approximately $263,625 in training delays. No cases of severe or genetic anemia were missed.

The updated algorithms streamlined anemia screening for Air Force trainees, reduced unnecessary evaluations, shortened medical hold times, and achieved significant cost savings. Eliminating race-based criteria simplified the process and improved consistency in evaluation and treatment. Although some borderline cases of anemia may still require unnecessary evaluations, future efforts will focus on further refining the algorithm and advocating for policy changes to additionally optimize efficiency and resource use.