Table 5. P-value and correlation between the USMLE Step 2 CK score and variables under investigation.

This shows the mean USMLE Step 2 CK examination scores and their standard deviations for all variables under investigation.

Variable	Sample (N)	Mean (SD)	Chi2 test	p-value	Correlation coefficient (r)
USMLE Step 2 CK score	36	233.9 (11.0)
Number of practice questions completed	36	3930.6 (1577.3)	0	1	-0.218
Number of days devoted to dedicated studying	36	85.1 (49.9)	0.7	0.403	-0.849
Percentage of time devoted to practice questions alone	36	66.3 (25.1)	2.48	0.115	0.858
Hours per day devoted to dedicated studying	36	10.1 (3.9)	0.002	0.963	-0.764
Percentage of time studying in a group setting	36	16.0 (18.1)	0	1	-0.088