NBME점수와 USMLE Step 1, Step2 점수와의 상관관계

NBME점수와 USMLE Step 1, Step2 점수와의 상관관계

Correlation of National Board of Medical Examiners Scores with United States Medical Licensing Examination Step 1 and Step 2 Scores

Christopher M. Zahn, MD, Aaron Saguil MD, MPH, Anthony R. Artino Jr, PhD, Ting Dong, PhD, Gerald Ming, Jessica T. Servey, MD, Erin Balog, MD, Matthew Goldenberg, MD, and Steven J. Durning, MD, PhD

목적 : 여섯 개의 Clerkship에 대한 NBME Subject Examination에서 성적이 USMLE Steps1 과 2 CK 시험 점수와 상관관계가 있는지를 살펴보았다. 또한 의과대학 학생들의 전임상(preclinical), 임상(clinical) 성적, subject exam, USMLE performance와 상관관계가 있는가도 살펴보았다.

방법 : 2008년부터 2010년에 졸업한 507명의 학생을 대상으로 하였다. Stepwise linear regression에 이은 Pearson correlation을 통해 USMLE Steps 1과 2CK 점수의 분산이 subject exam점수과 GPA에 의해서 설명이 되는가를 보았다.

결과 : 484명의 데이터가 분석에 사용되었다. USMLE Steps1 과 2CK 점수는 모든 subject exam점수와 GPA 점수에 대해 중등도~고도의 양의 상관관계를 보였다. subject exam score와 Step1, Step2CK의 상관계수는 각각 0.69와 0.77이었다. 회귀분석을 통해서 GPA가 Step1과 Step2 CK 점수 분산의 62%와 61%를 설명할 수 있음이 나타났다. 

결론 :  중등도~고도 상관관계는 subject exam 점수가 USMLE performance와 관련이 있음을 보여준다. 또한 USMLE점수의 분산의 상당부분이 primary care NBME점수에 대해서 설명가능한데, 이는 primary care와 관련된 주제들이 모든 임상실습(clerkship)에 걸쳐서 강조되고 있으며, USMLE, 특히 Step 2 CK 시험 내용의 상당부분을 차지하기 때문인 것으로 생각된다.

---

Acad Med. 2012 Oct;87(10):1348-54.

Correlation of National Board of Medical Examiners scores with United States Medical Licensing ExaminationStep 1 And Step 2 scores.

Zahn CM, Saguil A, Artino AR Jr, Dong T, Ming G, Servey JT, Balog E, Goldenberg M, Durning SJ.

Source

Department of Obstetrics and Gynecology, Uniformed Services University of the Health Sciences, F. Edward Hébert School of Medicine, Bethesda, Maryland 20814-4799, USA. czahn@usuhs.mil

Abstract

PURPOSE:

Determine whether the National Board of Medical Examiners (NBME) Subject Examination performance from six clerkships correlated with United States Medical Licensing Examination (USMLE) Steps 1 and 2 Clinical Knowledge (CK) Examination scores. Also, examine correlations between medical students' preclinical and clinical year mean cumulative grade point average (GPA), subject exam, and USMLE performance.

METHOD:

The sample consisted of 507 students from the 2008-2010 graduating classes from the authors' medical school. Pearson correlations followed by stepwise linear regressions were used to investigate variance in USMLE Steps 1 and 2 CK scores explained by subject exam scores and GPA.

RESULTS:

Data from 484 (95.5%) students were included. USMLE Steps 1 and 2 CK scores had moderate-to-large positive correlations with all subject exam scores and with both GPA variables. Correlations between composite subject exam scores and USMLE Steps 1 and 2 CK exams were 0.69 and 0.77, respectively. Regression analysis demonstrated that subject exams and GPA accounted for substantial variance in Steps 1 and 2 CK exam scores (62% and 61%); when entered into the regression model first, primary care clerkship subject examination scores accounted for most of this variance.

CONCLUSIONS:

The moderate-to-large correlations between subject exam performance and USMLE scores provide reassurance that subject exam scores are associated with USMLE performance. Furthermore, the considerable variance in USMLE scores accounted for by primary care NBME scores may be due to primary care topics being reinforced through all clerkships and comprising a significant portion of the USMLE examinations, particularly Step 2 CK.