Transition to Residency: National Study of Factors Contributing to Variability in Learner Milestones Ratings in Emergency Medicine and Family Medicine.

The greatest variance in milestone ratings can be attributed to the residency program, and to a lesser degree, learners and medical school. The dynamic impact of program-level factors on learners shift during the first-year and across the duration of residency training, highlighting the influence of curricular, instructional, and programmatic factors on resident performance throughout residency.