Table 3. OCT/OFDI analysis at stent edges.
| Overall | Edge with dissection | Edge without dissection | p-value | |
|---|---|---|---|---|
| (N = 345) | (N = 35) | (N = 310) | ||
| Reference lumen area, mm2 | 5.3 (4.0–7.3) | 4.3 (3.8–5.7) | 5.4 (4.1–7.4) | 0.0009 |
| Stent area at stent border, mm2 | 6.1 (4.7–7.8) | 6.0 (4.7–7.6) | 6.1 (4.6–7.8) | 0.82 |
| Lumen area at adjacent site of stent edge, mm2 | 5.7 (4.3–7.7) | 5.0 (4.0–6.6) | 5.7 (4.3–7.7) | 0.07 |
| Stent-oversizing index | 1.1 (1.0–1.3) | 1.4 (1.1–1.7) | 1.1 (1.0–1.3) | <0.0001 |
| Lumen long diameter / lumen short diameter | 1.1 (1.1–1.2) | 1.2 (1.1–1.3) | 1.1 (1.1–1.2) | 0.009 |
| Lumen eccentricity | 0.12 (0.09–0.17) | 0.16 (0.12–0.24) | 0.12 (0.09–0.16) | 0.002 |
| Type of plaque at stent edge | 0.87 | |||
| Normal | 30 (8.7) | 0 (0.0) | 30 (9.7) | |
| Fibrous | 208 (60.3) | 8 (22.9) | 200 (64.5) | |
| Lipidic | 64 (18.6) | 16 (45.7) | 48 (15.5) | |
| Fibrocalcific | 43 (12.5) | 11 (31.4) | 32 (10.3) | |
| Progressive atherosclerotic plaque | 107 (31.0) | 27 (77.1) | 80 (25.8) | <0.0001 |
| Location of dissection | ||||
| Proximal | - | 12 (34.3) | - | |
| Distal | - | 23 (65.7) | - | |
| Length of flap, mm | - | 0.9 (0.4–1.4) | - | |
| Thickness of flap, mm | - | 0.3 (0.2–0.4) | - | |
| Length of dissection, mm | - | 2.4 (1.5–3.4) | - | |
| Arc of dissection, ° | - | 45 (32–82) | - | |
| Depth of cavity, mm | - | 0.3 (0.2–0.4) | - | |
| Functional lumen area, mm2 | - | 3.7 (2.6–5.6) | - | |
| Depth of dissection | ||||
| Intima | - | 22 (62.9) | - | |
| Media | - | 13 (37.1) | - | |
| Adventitia | - | 0 (0.0) | - | |
| Hematoma | - | 2 (5.7) | - |
Values are presented as median (interquartile range), or n (%) for categorical variables. Generalized estimating equation (GEE) method with gamma with log-link model and was used for continuous valuables and GEE with ordinal logistic model was used for categorical data. OCT, optical coherence tomography; OFDI, optical frequency domain imaging.