Table 3. IVUS graysacle results of the stented sections of the two groups after stent placement.

Group		Vessel area (mm2)	Scaffold area (mm2)	Lumen area (mm2)	Lumen stenosis (%)
A	Immediately	8.38 ± 0.19	6.55 ± 0.10	4.46 ± 0.28†	21.59 ± 3.40
	6 months	10.66 ± 0.08*	8.07 ± 0.54†	5.45 ± 0.24*†	23.12 ± 1.90
	12 months	11.00 ± 0.17*	8.30 ± 0.46†	5.73 ± 0.26*†	28.49 ± 1.27*
B	Immediately	7.68 ± 0.23	6.49 ± 0.19	5.15 ± 0.25	15.72 ± 1.89
	6 months	10.93 ± 0.11*	6.49 ± 0.21	4.69 ± 0.19	22.40 ± 0.79*
	12 months	11.22 ± 0.30*	6.52 ± 0.19	4.43 ± 0.27*	26.60 ± 2.46*

^*Comparison of the vessel area and the lumen area of the stented CCAs at 6 and/or 12 months with that immediately after stent placement (P < 0.05) CCAs.

^†Comparison of the vessel area and the lumen area of the stented at the same times between group A and group B (P < 0.05).