title: How to predict USMLE scores from COMLEX-USA scores: a guide for directors of ACGME-accredited residency programs.
abstract: BACKGROUND
  Graduates of colleges of osteopathic medicine (COMs) frequently apply to residency training programs accredited by the Accreditation Council for Graduate Medical Education. However, students who have taken the Comprehensive Osteopathic Medical Licensing Examination (COMLEX-USA) rather than the United States Medical Licensing Examination (USMLE) may encounter a selection bias when applying to allopathic residency programs.
  
  
  OBJECTIVE
  To evaluate the correlation between scores on COMLEX-USA and USMLE by COM students who took both examinations.
  
  
  METHODS
  Scores were analyzed from a cohort of COM students who took COMLEX-USA Level 1 and USMLE Step 1 and a cohort of students who, during the same time, took COMLEX-USA Level 2 and USMLE Step 2.
  
  
  RESULTS
  At the Kirksville (Mo) College of Osteopathic Medicine of A.T. Still University of Health Sciences, 155 students took both COMLEX-USA Level 1 and USMLE Step 1 and another cohort of 56 students took COMLEX-USA Level 2 and USMLE Step 2. The Pearson product moment correlation of the scores from COMLEX-USA Level 1 and USMLE Step 1 was 0.83 (P<.001) and for COMLEX-USA Level 2 and USMLE Step 2 was 0.70 (P<.001). Scores on USMLE are predicted by the corresponding COMLEX-USA scores using the equations USMLE Step 1 = 67.97 + 0.24 x COMLEX-USA Level 1 (R(2)=0.68); and USMLE Step 2 = 102.2 + 0.18 x COMLEX-USA Level 2 (R(2)=0.46).
  
  
  CONCLUSIONS
  A method of estimating USMLE scores from COMLEX-USA scores is provided for residency directors of institutions accredited by the Accreditation Council for Graduate Medical Education for the evaluation of COM applicants.
authors.affiliation: Kirksville College of Osteopathic Medicine of A.T. Still University of Health Sciences, 800 W Jefferson Street, Kirksville, MO 63501-1443, USA. pslocum@kcom.edu
authors.forename: Philip C
authors.initials: PC
authors.lastname: Slocum
authors.forename: Janet S
authors.initials: JS
authors.lastname: Louder
mesh_terms: D000068:Accreditation; D004521:Educational Measurement; D006801:Humans; D007396:Internship and Residency; D010021:Osteopathic Medicine / Q000193:education*