• Andrew R Wiesen, Rodd E Marcum, Michele A Soltis, and Kris A Peterson.
• Office of the Assistant Secretary of Defense (Health Affairs), Health Readiness Policy and Oversight, Falls Church, VA.
• Mil Med. 2019 Jul 1; 184 (7-8): e329-e336.

IntroductionApproximately, 320 physicians enter active duty in the U.S. Army each year, replacing a similar number separating from service. Despite the significant costs involved in educating and training physicians, factors associated with continued active service after completing obligations have not been well studied.Materials And MethodsA retrospective cohort study was conducted of all U.S. Army physicians who graduated medical school in 1987 or later and entered active physician service on or before December 31, 2015. A Cox proportional hazards model was used to evaluate the likelihood of continued service after initial obligations to the Army were satisfied. A logistic regression model examined the likelihood of reaching retirement eligibility for the subgroup entering service before October 1998.ResultsOf the 10,490 physicians who met inclusion criteria, 8,009 physicians completed their service obligation by the end of the study. There were 4,524 physicians who entered service before October 1998 and were eligible for the retirement analysis. Several factors were found to be independently associated with a higher likelihood of continued post-obligation service and reaching retirement eligibility. These factors were: years of active service accumulated when obligations were complete; preventive medicine and infectious disease specialization; and male gender.ConclusionsThe physicians most likely to continue serving after completion of their obligation and ultimately retire are those who had the most years of service accumulated when they could leave the Army. Graduates from the Uniformed Services University of the Health Sciences (USU) incur an obligation of 7 years vs. 4 years for most other programs. USU also attracts a higher proportion of applicants with prior military service and pre-medical school service obligations. The lack of significant difference in service after obligation completion or achievement of retirement eligibility between USU and non-USU graduates was explained by the greater total service of USU graduates when their obligations were complete. Changing the obligation and incentives, such as salary, for other accessioning programs to mirror the USU model would likely minimize service differences between USU and non-USU graduates.Published by Oxford University Press on behalf of the Association of Military Surgeons of the United States 2018.

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