Factor	Univariate logistic regression		Multiple logistic regression
	OR (95% CI)	p-value	OR (95% CI)	p-value
Attendance in regular ECG classes	0.51 (0.30–0.85)	0.010	1.07 (0.57–1.99)	0.838
ECG teaching during clinical clerkships	2.75 (1.65–4.60)	<0.0001	1.36 (0.62–2.97)	0.444
Self-learning	0.78 (0.47–1.28)	0.320
Self-learning, printed materials	1.04 (0.63–1.74)	0.871
Self-learning, web-based sources	0.64 (0.34–1.20)	0.163
Work experience in medicine	7.78 (4.28–14.14)	<0.0001	7.97 (4.03–15.77)	<0.0001

OR: Odds Ratio; CI: Confidence Interval.

Int J Med Educ. 2022; 13:315-321; doi: 10.5116/ijme.6372.2a55