Table 2 Optical Coherence Tomography findings at baseline in the reference segments, the stenosis segment and at strut level

Stent length by OCT, mm

26.3 (20.0–31.4)

28.6 (24.0–40.0)

0.241^a

Number of frames per pullback, n

539 (374–540)

539 (374–540)

0.742^a

Reference segments

 CS lumen area proximal reference, mm2

9.6 (7.6–12.6)

8.7 (5.9–11.0)

0.158^a

 Minimal Lumen Diameter at proximal reference, mm

3 (2.7–3.5)

3 (2.5–3.5)

0.384^a

 CS lumen area distal reference, mm2

5.7 (4.6–8.5)

5 (3.3–6.9)

0.334^a

 Minimal Lumen Diameter at distal reference, mm

2.6 (2–3.1)

2.3 (1.8–2.8)

0.261^a

 Dissection at proximal stent edge, n (%)

0 (0.0)

1 (5.9)

0.472^b

 Mean dissection length at proximal stent edge, mm

0 (0.0)

0.05 (0.2)

0.290b

 Dissection at distal stent edge, n (%)

2 (10.5)

1 (5.9)

1.000^b

 Mean dissection’s length at distal stent edge, mm

8.4 (7.7–15)

12.1 (7.5–13.2)

0.667^a

Stenosis segment

 CS lumen area at maximal obstruction, mm2

6.1 (1.8)

5.1 (1.8)

0.122c

 Lumen area stenosis (mean area as reference), %

23.2 (3.6–32.7)

17.3 (10–27.8)

0.692^a

 CS stent area at maximal obstruction, mm2

6.1 (1.8)

5.1 (1.8)

0.097^c

 MSA in proximal stent half segment, mm2

7.03 (1.8)

5.9 (1.8)

0.073^c

 MSA in distal stent half segment,

6.1 (2.0)

4.8 (1.7)

0.107^c

 Mean in-stent CS area, mm2

8.1 (2.2)

7 (2.0)

0.134^c

 Stent expansion at MSA, %

75.1 (57.4–87.8)

70.4 (57.7–86.9)

0.704^c

 Mean stent expansion, %

116.6 (24.0)

115.9 (18.7)

0.784^c

 In-stent stent volume, mm3

157.4 (136–273)

166.5 (104.8–258)

0.537^a

Vessel characterization at MSA

Plaque characterization

0.280^b

 Fibrotic,n (%)

0 (0.0)

0 (0.0)

 Lipidic, n (%)

4 (21.1)

5 (29.4)

 Mixed non-calcified, n (%)

4 (21.1)

7 (41.2)

 Mixed calcified, n (%)

9 (47.4)

3 (17.6)

 Calcification arc, degrees

65.6 (71)

30.6 (51.5)

0.104^c

 Calcification deep, mm

0.4 (0.4)

0.2 (0.4)

0.340^c

 Thrombus presence, n (%)

7 (36.8)

2 (11.8)

0.128^b

 Tissue prolapse, n (%)

10 (52.6)

8 (47.1)

1.000^b

 Major tissue prolapse, n (%)

3 (15.8%)

3 (17.6%)

0.895^b

Strut analysis

 Total number of struts analyzed per lesion, n

2031 (664)

2545.5 (1187)

0.113^c

 Number of struts per cross-section, n

10.2 (1.6)

10.3 (1.4)

0.863^c

 Frequency of malapposed struts per lesion, %

5.7 (1.9–12)

5.7 (3.8–13)

0.862^a

 Malapposition > 300 µm,%

0.79 (1.5)

1.5 (2.7)

0.347^c

 Malapposition volume, mm3

11 (4.8)

13.5 (8.4)

0.285^c

 Maximal consecutive length of malapposed struts, mm

1.9 (1.0–3.4)

2 (1.1–3.5)

0.715^a