Table 1

Baseline Characteristics of Patients With or Without a New CTO at 1 Year Post-CABG

CharacteristicAll
(N = 388)
New CTO
(n = 169)
No New CTO
(n = 219)
p Value
Age, yrs60.3 ± 8.560.8 ± 8.360 ± 8.60.94
Age >70 yrs60 (15.5)27 (16)33 (15)
Male sex338 (87.1)145 (85.8)193 (88.1)0.5
Preoperative MI177 (45.6)78 (46.2)99 (40.2)0.85
Nonelective surgery125 (32.2)63 (37.3)62 (28.3)0.06
Current smoker68 (17.5)29 (17.2)39 (17.8)0.87
Hypertension180 (46.4)81 (47.9)99 (45.2)0.59
Hypercholesterolemia268 (69.0)117 (69.2)151 (68.9)0.95
PVD history27 (7.0)13 (7.7)14 (6.4)0.62
Diabetes mellitus106 (27.3)45 (26.6)61 (27.9)0.79
 Insulin treatment20 (5.2)6 (3.6)14 (6.4)0.21
CCS class of angina0.0009
 15 (1.3)2 (1.2)3 (1.4)
 295 (24.5)33 (19.5)62 (28.3)
 3191 (49.2)77 (45.6)114 (52.0)
 497 (25.0)57 (33.7)40 (18.3)
Left ventricular grade0.92
 1191 (49.2)91 (53.8)100 (45.7)
 2192 (49.5)77 (45.6)115 (52.5)
 34 (1.0)1 (0.6)3 (1.4)
 41 (0.3)01 (0.4)
Creatinine, μmol/l89.7 ± 19.393.1 ± 21.592 ± 17.30.08

Values are mean ± SD or n (%).

CABG = coronary artery bypass grafting; CCS = Canadian Cardiovascular Society; CTO = chronic total occlusion; MI = myocardial infarction; PVD = peripheral vascular disease.