Active Retrograde Extra Backup with a Mother-and-Child Catheter to Facilitate Retrograde Microcatheter Collateral Channel Tracking in Recanalization of Coronary Chronic Total Occlusion

Table 1

Clinical characteristics of study population.

Variables	ARB group (n = 129)	Non-ARB group (n = 142)	value
Age (years)	65.8 ± 8.7	66.2 ± 9.1	0.427
Gender (female), n (%)	52 (40.3%)	55 (38.7%)	0.805
Body mass index (kg/m^2)	22.7 ± 2.9	23.1 ± 3.5	0.394
Diabetes mellitus, n (%)	42 (32.6%)	45 (31.7%)	0.897
Hypertension, n (%)	39 (30.2%)	48 (33.8%)	0.603
Dyslipidaemia on admission, n (%)	38 (29.5%)	40 (28.2%)	0.893
Current smoker, n (%)	61 (47.3%)	66 (46.5%)	0.904
Previous MI, n (%)	35 (27.1%)	40 (28.2%)	0.892
Previous PCI, n (%)	96 (74.4%)	101 (71.1%)	0.586
Previous CABG, n (%)	9 (7.0%)	12 (8.5%)	0.821
LVEF (%)	42.1 ± 7.2	41.7 ± 7.5	0.717

MI, myocardial infarction; PCI, percutaneous coronary intervention; CABG, coronary artery bypass grafting; LVEF, left ventricular ejection fraction.