Table 1. Demographic variables of the full study population.
| Variable | Tercile 1 (n=100) | Tercile 2 (n=100) | Tercile 3 (n=100) | P value | All (n=300) |
|---|---|---|---|---|---|
| Age, mean ± SD | 66.6±10.5 | 66.6±10.4 | 65.7±9.2 | 0.783 | 66.3±10.0 |
| Male gender | 88 (88.0%) | 82 (82.0%) | 77 (77.0%) | 0.125 | 247 (82.3%) |
| BMI, median (IQR) | 27.0 (24.3–29.2) | 26.4 (23.7–30.4) | 27.7 (24.7–30.1) | 0.057 | 27.2 (24.3–30.0) |
| Obesity | 19 (19.0%) | 27 (27.0%) | 26 (26.0%) | 0.346 | 72 (24.0%) |
| Smoking | 54 (54.0%) | 19 (19.0%) | 18 (18.0%) | <0.001 | 91 (30.3%) |
| Diabetes mellitus | 31 (31.0%) | 26 (26.0%) | 20 (20.0%) | 0.221 | 77 (25.8%) |
| Arterial hypertension | 68 (68.0%) | 57 (57.0%) | 58 (58.0%) | 0.213 | 183 (61.0%) |
| Hypercholesterolemia | 93 (93.0%) | 97 (97.0%) | 71 (71.0%) | <0.001 | 261 (87.0%) |
| Creatinine, median (IQR) | 1.02 (0.92–1.16) | 1.01 (0.92–1.16) | 0.94 (0.82–1.12) | 0.106 | 0.99 (0.86–1.17) |
| EuroSCORE II | 1.26 (0.96–1.95) | 1.01 (0.90–2.08) | 2.02 (1.24–3.52) | 0.242 | 1.48 (0.96–2.43) |
| Previous PCI | 33 (33.0%) | 49 (49.0%) | 37 (37.0%) | 0.055 | 119 (39.7%) |
| Prior MI | 14 (14.0%) | 9 (9.0%) | 8 (8.0%) | 0.328 | 31 (10.3%) |
| Admission for ACS | |||||
| STEMI | 8 (8.0%) | 9 (9.0%) | 11 (11.0%) | 0.759 | 28 (9.3%) |
| NSTEMI | 18 (18.0%) | 10 (10.0%) | 14 (14.0%) | 0.265 | 42 (14.0%) |
| Hybrid procedure | 25 (25.0%) | 30 (30.0%) | 17 (17.0%) | 0.095 | 72 (24.0%) |
| Construction | 0.001 | ||||
| SIMA + 1 distal anastomosis | 69 (69.0%) | 64 (64.0%) | 52 (52.0%) | 185 (61.7%) | |
| SIMA + 2 distal anastomoses | 27 (27.0%) | 30 (30.0%) | 29 (29.0%) | 86 (28.7%) | |
| BIMA or more than 2 distal anastomoses | 4 (4.0%) | 6 (6.0%) | 19 (19.0%) | 29 (9.7%) | |
| Target vessels | 0.038 | ||||
| LAD | 69 (69.0%) | 60 (60.0%) | 50 (50.0%) | 179 (59.7%) | |
| LAD + Dx | 25 (25.0%) | 34 (34.0%) | 38 (38.0%) | 97 (32.3%) | |
| LAD + Cx | 0 (0.0%) | 2 (2.0%) | 6 (6.0%) | 8 (2.7%) | |
| Other | 4 (4.0%) | 4 (4.0%) | 6 (6.0%) | 14 (4.7%) | |
| Surgical time, min | 249±54.2 | 259±76.0 | 266±104 | 0.339 | 258±80.7 |
P<0.05 is considered statistically significant. ACS, acute coronary syndrome; BIMA, bilateral internal mammary arteries; BMI, body mass index; IQR, interquartile range; MI, myocardial infarction; NSTEMI, non-ST-elevation myocardial infarction; PCI, percutaneous coronary intervention; SD, standard deviation; SIMA, single internal mammary artery; STEMI, ST-elevation myocardial infarction.