Table 2. Stepwise multivariate regression analysis for predicting the correct diagnosis of acute myocardial infarction. The 15-lead ECG was the sole factor associated significantly with the correct diagnosis.

	OR	CI	p
15-lead ECG	2.43	1.87-2.98	0.04
12-lead ECG	0.32	0.35-1.47	0.1
ST segment depression in V1-V4	1.24	0.65-1.1	0.67