Table 1.

Patient Characteristics

	Small Q (+) (%)	Small Q (−) (%)	P‐Value
Number of patients	87	663
Age (mean ± SD)	66.0 ±10.5	65.8 ± 11.3	0.887
Sex (M/F)	71 (81.6)/16	468 (70.6)/195	0.031
Reason for catheterization (Clinical diagnosis, includes overlap)
CAD (includes suspicion)	76 (87.3)	537 (81.0)	0.183
Cardiomyopathy	7 (8.0)	26 (3.9)	0.091
Valvular heart disease	2 (2.3)	59 (8.9)	0.034
Arrhythmia	4 (4.6)	60 (9.0)	0.219
Congenital heart disease	1 (1.1)	3 (0.5)	0.390
Others (aortic disease, myocarditis, pulmonary hypertension, tumour, syncope, etc.)	2 (2.3)	29 (4.4)	0.566
History of revascularization	28 (32.2)	147 (22.2)	0.043
(PCI/CABG/PCI+CABG)	(13/12/3)	(68/74/5)

CABG = coronary artery bypass grafting; CAD = coronary artery disease; PCI = percutaneous coronary intervention.