Table 1.
Baseline characteristics of the study cohort according to CTO location within the coronary tree
| Overall (lesions) | Proximal | Mid | Distal | p | |
|---|---|---|---|---|---|
| N (%) | 1369 | 633 (46%) | 557 (41%) | 179 (13%) | |
| Age (years)* | 66±10 | 66±10 | 66±10 | 64±11 | 0.030 |
| Male (%) | 85 | 84 | 86 | 86 | 0.451 |
| Diabetes melitus (%) | 45 | 45 | 45 | 49 | 0.670 |
| Dyslipidemia (%) | 94 | 94 | 95 | 94 | 0.912 |
| Hypertension (%) | 89 | 91 | 86 | 89 | 0.019 |
| Prior MI (%) | 44 | 44 | 43 | 48 | 0.537 |
| Smoking (%) | 26 | 31 | 22 | 23 | 0.005 |
| Prior PCI (%) | 63 | 62 | 61 | 69 | 0.177 |
| Prior failed CTOPCI (%) | 18 | 17 | 19 | 17 | 0.673 |
| Prior CABG (%) | 35 | 40 | 28 | 37 | <0.001 |
| Heart failure (%) | 27 | 30 | 26 | 20 | 0.035 |
| History of stroke (%) | 11 | 11 | 11 | 12 | 0.873 |
| Peripheral arterial disease | 16 | 16 | 16 | 17 | 0.908 |
| Ejection fraction (%) | 50±14 | 49±14 | 51±14 | 53±12 | 0.046 |