Table 3

Quantitative Coronary Angiographic Analysis

Non-LM Bifurcation (n = 2,044)LM Bifurcation (n = 853)
1-Stent
(n = 1,618)
2-Stent
(n = 426)
p Value1-Stent
(n = 509)
2-Stent
(n = 344)
p Value
Bifurcation angle, °54.0 (43.0 to 68.0)50.0 (40.0 to 62.0)<0.0181.2 (62.9 to 102.2)78.2 (64.1 to 99.8)0.30
Pre-intervention
 MV RD, mm2.9 (2.7 to 3.2)2.9 (2.6 to 3.1)0.043.4 (3.0 to 3.7)3.3 (3.0 to 3.6)0.01
 SB RD, mm2.4 (2.3 to 2.5)2.4 (2.2 to 2.5)<0.012.8 (2.5 to 3.3)2.7 (2.4 to 3.0)<0.01
 MV MLD, mm0.9 (0.6 to 1.2)0.9 (0.6 to 1.3)<0.011.2 (0.8 to 1.6)1.2 (0.9 to 1.5)0.43
 SB MLD, mm1.3 (0.9 to 1.8)0.9 (0.5 to 1.2)<0.012.2 (1.6 to 2.6)1.2 (0.9 to 1.6)<0.01
 MV diameter stenosis, %70.1 ± 14.467.1 ± 17.0<0.0163.6 ± 17.763.6 ± 16.00.98
 SB diameter stenosis, %44.7 ± 22.562.8 ± 19.2<0.0128.9 ± 22.353.1 ± 19.1<0.01
 MV lesion length, mm16.4 (10.5 to 24.3)18.8 (11.0 to 28.5)0.0112.3 (7.8 to 22.6)14.8 (9.2 to 24.5)<0.01
 SB lesion length, mm1.1 (0 to 6.0)9.3 (4.6 to 16.1)<0.010 (0 to 2.3)6.9 (3.5 to 14.1)<0.01
Post-intervention
 MV RD, mm3.0 (2.7 to 3.2)2.9 (2.7 to 3.2)<0.013.4 (3.0 to 3.8)3.4 (3.0 to 3.7)0.38
 SB RD, mm2.4 (2.3 to 2.5)2.4 (2.3 to 2.5)0.042.8 (2.5 to 3.3)2.8 (2.4 to 3.2)0.01
 MV MLD, mm2.6 (2.3 to 2.9)2.6 (2.3 to 2.9)0.952.9 (2.6 to 3.3)2.8 (2.5 to 3.1)<0.01
 SB MLD, mm1.34 (1.0 to 1.8)2.2 (1.9 to 2.4)<0.012.2 (1.8 to 2.6)2.5 (2.3 to 3.0)<0.01
 MV residual stenosis, %14.1 ± 13.212.3 ± 11.4<0.0114.0 ± 12.916.5 ± 11.1<0.01
 SB residual stenosis, %44.3 ± 22.38.9 ± 15.9<0.0125.0 ± 18.86.8 ± 15.0<0.01
 MV acute gain, mm1.68 (1.3 to 2.0)1.6 (1.2 to 2.0)0.021.8 (1.3 to 2.2)1.6 (1.3 to 2.0)0.11
 SB acute gain, mm0 (−0.3 to 0.3)1.3 (1.0 to 1.6)<0.010 (−0.3 to 0.3)1.4 (1.0 to 1.7)<0.01

Values are median (interquartile range) or mean ± SD.

LM = left main; MLD = minimal lumen diameter; MV = main vessel; RD = reference diameter; SB = side branch.