A Narrative Review of the Evidence Supporting Factors Used by Residency Program Directors to Select Applicants for Interviews.

BACKGROUND: Residency applicants feel increasing pressure to maximize their chances of successfully matching into the program of their choice, and are applying to more programs than ever before.
OBJECTIVE: In this narrative review, we examined the most common and highly rated factors used to select applicants for interviews. We also examined the literature surrounding those factors to illuminate the advantages and disadvantages of using them as differentiating elements in interviewee selection.
METHODS: Using the 2018 NRMP Program Director Survey as a framework, we examined the last 10 years of literature to ascertain how residency directors are using these common factors to grant residency interviews, and whether these factors are predictive of success in residency.
RESULTS: Residency program directors identified 12 factors that contribute substantially to the decision to invite applicants for interviews. Although United States Medical Licensing Examination (USMLE) Step 1 is often used as a comparative factor, most studies do not demonstrate its predictive value for resident performance, except in the case of test failure. We also found that structured letters of recommendation from within a specialty carry increased benefit when compared with generic letters. Failing USMLE Step 1 or 2 and unprofessional behavior predicted lower performance in residency.
CONCLUSIONS: We found that the evidence basis for the factors most commonly used by residency directors is decidedly mixed in terms of predicting success in residency and beyond. Given these limitations, program directors should be skeptical of making summative decisions based on any one factor.