Department of Obstetrics and Gynecology, Uniformed Services University of the Health Sciences, F. Edward Hébert School of Medicine, Bethesda, Maryland 20814-4799, USA.
Acad Med. 2012 Oct;87(10):1348-54. doi: 10.1097/ACM.0b013e31826a13bd.
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.
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.
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.
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.
确定 6 个实习科室的美国医师执照考试委员会（NBME）学科考试成绩是否与美国医师执照考试（USMLE）步骤 1 和 2 临床知识（CK）考试成绩相关。此外，还检查医学生的基础临床学年平均总绩点（GPA）、学科考试和 USMLE 成绩之间的相关性。
该样本包括来自作者医学院 2008-2010 届毕业的 507 名学生。采用 Pearson 相关分析和逐步线性回归分析，调查 USMLE 步骤 1 和 2 CK 成绩的方差，这些成绩由学科考试成绩和 GPA 解释。
纳入了 484 名（95.5%）学生的数据。USMLE 步骤 1 和 2 CK 成绩与所有学科考试成绩以及两个 GPA 变量均呈中到大的正相关。综合学科考试成绩与 USMLE 步骤 1 和 2 CK 考试之间的相关性分别为 0.69 和 0.77。回归分析表明，学科考试和 GPA 占 USMLE 步骤 1 和 2 CK 考试成绩的大部分方差（62%和 61%）；当首先进入回归模型时，初级保健科室的学科考试成绩占了大部分方差。
学科考试成绩与 USMLE 成绩之间的中等至较大相关性，让人放心，学科考试成绩与 USMLE 成绩相关。此外，初级保健 NBME 分数对 USMLE 分数的相当大的方差解释可能是由于初级保健科目的强化贯穿所有实习科室，并且构成了 USMLE 考试的重要部分，特别是第 2 步 CK。
