Table 2.

Estimates for Variables that Correlate with Answering Questions Correctly

Variable	All Questions		Questions on Factors that Can Prolong the QT Interval		Questions on Medications that Can Prolong the QT Interval
	Adjusted Estimates‡(95% CI)	P Value	Adjusted Estimates‡(95% CI)	P Value	Adjusted Estimates‡(95% CI)	P Value
Graduation after 1999*	−0.27(−1.28 to 0.74)	.002	−0.10(−0.63 to 0.42)	.558	−0.31(−0.94 to 0.32)	<.001§
Graduation between 1990 and 1999*	1.13(0.27 to 1.99)		0.14(−0.31 to 0.58)		0.90(0.37 to 1.44)
Attending physician†	−0.32(1.27 to 0.62)	<.001	0.16(−0.32 to 0.65)	.002	−0.34(−0.93 to 0.24)	<.001∥
Professional status other than attending physician†	−2.52(−3.43 to −1.60)		−0.71(−1.18 to −0.24)		−1.61(−2.17 to −1.04)
Practicing at an academic institution	2.36(1.03 to 3.69)	<.001	1.05(0.40 to 1.71)	.002	1.09(0.34 to 1.84)	.005

^*Reference variable is graduation before 1990

^†Reference variable is physicians in training

^‡Estimates should be interpreted as follows: negative estimates indicate a fewer number of correct answers, positive estimates indicate a higher number of correct answers

^§P values are for any difference among the 3 comparison groups (graduation before 1990, graduation between 1990 and 1999, and graduation after 1999)

^∥P values are for any difference among the 3 comparison groups (attending physician, professional status other than attending physician, and physicians in training)