Table 4.

Association between individual electrocardiogram abnormality and severity of coronary artery disease

	Severe CAD	Non-severe CAD	P	OR (95% CI)
A, n	4	27	0.109	0.35 (0.10-1.28)
B, n	13	53	0.414	0.60 (0.18-2.03)
C, n	21	18	0.001	0.13 (0.04-0.43)
D, n	15	13	0.002	0.13 (0.03-0.46)

A=Isolated T-wave inversion of >0.1 mv (including normalization of a known negative T-wave), B=Isolated ST-segment depression of >0.05 mv, C=ST-segment depression with concomitant T-wave inversion in same leads, D=ST-segment depression and T-wave inversion in different leads. CAD=Coronary artery disease, OR=Odds ratio, CI=Confidence interval