	Group of risk factors	Normal vessels		One vessel		Two vessels		Three vessels		Total		P value
	Group of risk factors	No	%	No	%	No	%	No	%	No	%
Group of risk factors	No risk factor	14	4.5	4	2.6	0	0	0	0	18	2.6	<0.001
	1 risk factors	55	17.9	11	7.1	11	9.3	7	6.5	84	12.2
	2 risk factors	99	32.1	39	25.3	26	22	26	24.1	190	27.9
	≥3 risk factors	140	45.5	100	64.9	81	68.6	75	69.4	396	57.6
Clinical diagnosis	Atypical chest pain	202	65.6	4	2.6	4	3.4	1	0.9	211	30.7	<0.001
	Myocardial infraction	13	4.2	39	25.3	40	33.9	33	30.6	125	18.2
	Unstable angina	39	12.7	67	43.5	59	50.0	55	50.9	220	32.0
	Stable angina	54	17.5	44	28.6	15	12.7	19	17.6	132	19.2