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Acad Med. 2010 Oct;85(10 Suppl):S98-101. doi: 10.1097/ACM.0b013e3181ed3f5c.

Relationship between performance on the NBME Comprehensive Basic Sciences Self-Assessment and USMLE Step 1 for U.S. and Canadian medical school students.

Author information

1
cmorrison@nbme.org

Abstract

BACKGROUND:

This study examined the relationship between performance on the National Board of Medical Examiners Comprehensive Basic Science Self-Assessment (CBSSA) and performance on United States Medical Licensing Examination Step 1.

METHOD:

The study included 12,224 U.S. and Canadian medical school students who took CBSSA prior to their first Step 1 attempt. Linear and logistic regression analyses investigated the relationship between CBSSA performance and performance on Step 1, and how that relationship was related to interval between exams.

RESULTS:

CBSSA scores explained 67% of the variation in first Step 1 scores as the sole predictor variable and 69% of the variation when time between CBSSA attempt and first Step 1 attempt was also included as a predictor. Logistic regression results showed that examinees with low scores on CBSSA were at higher risk of failing their first Step 1 attempt.

CONCLUSIONS:

Results suggest that CBSSA can provide students with a realistic self-assessment of their readiness to take Step 1.

PMID:
20881715
DOI:
10.1097/ACM.0b013e3181ed3f5c
[Indexed for MEDLINE]
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