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Predictors of performance on NBME Subject Exam in Obstetrics and Gynecology and USMLE 2

Objective: To determine if midrotation and standardized tests predict performance on the obstetrics and gynecology (OB/GYN) NBME exam as well as USMLE 2.

Study Design: A midrotation test is administered to all medical students during their OB/GYN clerkship. This IRB exempt study involved retrospective review of de-identified student data from 2003 to 2012, including basic demographics. Pearson’s correlation was used to determine the relationships among educational assessments (midterm/practical examinations in OB/GYN, MCAT, USMLE 1 and 2, NBME). Logistic regression was used to determine significant predictors of failing the NBME.

Results. Among 199 student subjects reviewed, the study population was predominately white (78%), male (69%), having an average of 3 rotations prior to OB/GYN and from West Virginia (54%). The mean NBME score was 74 (range: 53-99). There were significant positive correlations between NBME scores and midterm (R=0.23, p=0.001), USMLE 1 (R=0.43,p=0.001), and practical exam (R=0.41,p=0.001). MCAT scores and number of prior rotations did not affect NBME scores. Rather, MCAT scores correlated with USMLE 1 (R=0.35,p<0.001), but not with USMLE 2 (R=0.17,p=0.07). USMLE 2 scores correlated with midterm (R=0.40, p<0.001), practical exam (R=0.22 p=0.08) and NBME scores (R=0.55,p<0.001). Student scoring in the lower third of the midterm (<75%) trended towards failing the NBME (OR: 5.0; CI:0.93:26.3,p=0.06).

Conclusions: Students at risk of failing the NBME and USMLE 2 can be identified with midterm exam. Past performance on MCAT and USMLE 1 did not predict performance on NBME or USMLE 2 administered during clinical years. A remedial plan may improve performance.

Topics: 2014, Student, Clerkship Director, Clerkship Coordinator, Osteopathic Faculty, Medical Knowledge, UME, Assessment,

General Information

Date Presented
2014 ASL Abstract

Assessment, Instructional Materials/Methods, Licensure & Certification, Student Affairs

Intended Audience
Stufent, Clerkship Director, Clerkship Coordinator, Osteopathic Faculty 

Copentencies Addressed
Medical Knowledge

Educational Continuum

Educational Focus

Student,Clerkship Director,Clerkship Coordinator,Osteopathic Faculty,
Medical Knowledge,
Clinical Focus

Author Information

Primary Author
Jabin Janoo. MD
Robert DePond MD
Dara Seybold MA
Mike Broce MA
Stephen Bush MD


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