Table 2.
Lesion characteristics and quantitative coronary angiography findings.
| Overall population (n = 249) | Sex |
p value | ||
|---|---|---|---|---|
| Male (n = 206) | Female (n = 43) | |||
| Time since implantation, years | 5.9 ± 4.3 | 6.2 ± 4.3 | 4.4 ± 3.9 | 0.015 |
| Culprit vessel | 0.827 | |||
| Left anterior descending | 162 (65.1) | 132 (64.1) | 30 (69.8) | |
| Circumflex | 34 (13.6) | 30 (14.6) | 4 (9.3) | |
| Right | 51 (20.5) | 42 (20.4) | 9 (20.9) | |
| Other | 2 (0.8) | 2 (0.9) | 0 (0) | |
| Type of previous stent | 0.152 | |||
| Drug-eluting stent | ||||
| First-generation | 56 (22.5) | 49 (23.8) | 7 (16.3) | |
| New-generation | 168 (67.5) | 134 (65.0) | 34 (79.1) | |
| Unknown | 25 (10.0) | 23 (11.2) | 2 (4.7) | |
| Lesion characteristics | ||||
| Bifurcation (>1.5 mm) | 89 (35.7) | 73 (35.4) | 16 (37.2) | 0.825 |
| Ostial location | 16 (6.4) | 14 (6.8) | 2 (4.7) | 0.857 |
| In-stent restenosis pattern* | 0.925 | |||
| Type Ⅰ | 88 (35.3) | 74 (35.9) | 14 (32.6) | |
| Type Ⅱ | 72 (28.9) | 59 (28.6) | 13 (30.2) | |
| Type Ⅲ | 73 (29.3) | 59 (28.6) | 14 (32.5) | |
| Type Ⅳ | 16 (6.4) | 14 (6.8) | 2 (4.7) | |
| QCA analysis of lesion segment | ||||
| Restenosis lesion length, mm | 11.3 (7.9, 15.4) | 11.2 (7.7, 15.0) | 13.3 (8.2, 18.8) | 0.189 |
| Reference vessel diameter, mm | 2.7 (2.3, 3.1) | 2.7 (2.3, 3.1) | 2.7 (2.1, 3.0) | 0.447 |
| Minimum lumen diameter, mm | 1.0 (0.7, 1.3) | 1.0 (0.7, 1.4) | 1.0 (0.4, 1.3) | 0.769 |
| Diameter stenosis,% | 62.0 (50.7, 74.1) | 61.9 (50.5, 74.0) | 62.6 (51.0, 74.5) | 0.869 |
Values are n (%) or mean or median with first and third quartiles. *In-stent restenosis pattern was defined as per Mehran's classification.