Table 2

Three weeks stent-level optical coherence tomography (OCT) analysis

		BMS (n=18)	MSG (n=19)	p Value
Quantitative findings	Minimum lumen area (mm²)	4.4 (3.3–6.6)	4.6 (3.7–5.7)	0.68
	NIH at minimum lumen area site (%)	21.5 (9.7–30.4)	20.3 (11.2–26.2)	0.72
	Minimum stent area (mm²)	5.85 (4.3–6.9)	5.5 (4.4–6.3)	0.47
	Proximal reference lumen area (mm²)	6.5 (5.9–8.8)	6.9 (5.0–8.3)	0.72
	Distal reference lumen area (mm²)	6.2 (3.4–7.5)	5.3 (4.3–7.5)	0.69
	Stent length by OCT (mm)	18.4 (18.2–19.6)	18.2 (17.8–22.6)	0.52
	Lumen area (mm³/mm)	6.2 (3.9–7.8)	5.7 (5.0–6.9)	0.71
	Stent area (mm³/mm)	6.8 (5.4–8.0)	6.3 (5.8–7.1)	0.54
	Neointimal thickness (stent level) (mm)	0.095 (0.06–0.17)	0.085 (0.07–0.12)	0.81
	Neointimal thickness (strut level) (mm)	0.09 (0.04–0.17)	0.07 (0.04–0.15)	0.83
	NIH area (mm³/mm)	0.7 (0.3–1.3)	0.6 (0.4–0.9)	0.83
	%NIH volume (=NIH/stent volume) (%)	11.0 (3.9–21.5)	8.9 (5,7–13.6)	0.86
Strut level findings	Total struts analysed	198 (184–226)	209 (195– 257)	0.17
	A. Definitely uncovered (%)	0 (0–0)	0 (0–0)	0.97
	B. Covered with fibrin (%)	0 (0–0)	0 (0–0)	0.71
	C. Partially covered (%)	1.7 (0.4–4.6)	2.83 (0.3–7.5)	0.74
	D. Covered-protruding (%)	17.4 (3.5–41.7)	18.68 (12.3–34.9)	0.95
	E. Covered-embedded (%)	81.2 (49.8–95.5)	74.21 (58.9–86.4)	0.90
	Fully uncovered (A+B) (%)	0.0 (0.0–0.5)	0.0 (0–0.5)	0.94
	Malapposed (%)	0 (0–1.02)	0 (0–2.6)	0.80
Qualitative findings	Homogeneous NIH (%)	76.5%	72.2%	1.00
	Heterogeneous NIH (%)	17.6%	27.8%	0.69
	Layered NIH (%)	5.9%	0.0%	0.49
	NIH with macrophage (%)	0 (0.0%)	1 (5.3%)	1.00
	NIH with peri-strut microvessel (%)	2 (11.1%)	1 (5.3%)	0.60
	NIH with any thrombus (%)	2 (11.8%)	2 (10.5%)	1.00
	Any malapposition (%)	7 (38.9%)	8 (42.1%)	0.84
	Length of malapposition (mm)	2.4 (0.4–4.2)	1.9 (1.4– 5.5)	0.91

Median and IQR.
BMS, bare metal stent; MSG, microengineered stent grooves; NIH, neointimal hyperplasia.