Analysis of National Resident Matching Program for Radiology Fellowships: Factors Affecting Program Fill Rates

The National Resident Matching Program (NRMP) is used by an increasing number of diagnostic radiology (DR) residents applying to subspecialty fellowships. Data characterizing match outcomes on the basis of program characteristics are limited. The aim of this study was to determine if fellowship or residency size, location, or perceived reputation was related with a program filling its quota.

Using public NRMP data from 2004 to 2022, DR residency, breast imaging (BI), musculoskeletal imaging (MSK), interventional radiology (IR), and neuroradiology (NR) fellowship programs were characterized by geography, DR and fellowship quota, applicants per position (A/P), and reputation as determined by being an Aunt Minnie best DR program semifinalist, Doximity 2021-2022 top 25 program, or U.S. News & World Report top 20 hospital. The DR program's reputation was substituted for fellowships at the same institution. A program was considered filled if it met its quota.

The 2022 A/P ratios were 1.02 for IR, 0.83 for BI, 0.75 for MSK, and 0.88 for NR. IR was excluded from additional analysis because its A/P was >1. The combined BI, MSK, and NR fellowships filled 78% of positions (529 of 679) and 56% of programs (132 of 234). Factors associated with higher program filling included Doximity top 25 program, Aunt Minnie semifinalist, and U.S. News & World Report top 20 hospital affiliation (P < .001 for all); DR residency quota greater than 9, and fellowship quota of three or more (P < .01). The Ohio Valley (Ohio, western Pennsylvania, West Virginia, and Kentucky) filled the lowest, at 39% of programs (P = .06).

Larger fellowship programs with higher perceived reputations and larger underlying DR residency programs were significantly more likely to fill their NRMP quota.