Table 2.

VI in different molecular subgroups of breast cancer.

Subgroup	Number (%)	VI (%)
		M (25%~75%)	Range
Luminal A	41 (18.2)	5.9 (2.6~11.6)	0~47.1
Luminal B HER-2-negative	91 (40.4)	7.3 (4.4~10.5)	0~29.5
Luminal B HER-2-positive	26 (11.6)	6.3 (3.9~11.3)	0.6~22.2
HER-2-positive	17 (7.6)	8.2 (4.9~15.6)	0.9~54.4
Triple-negative	50 (22.2)	9.2 (5.1~15.3)	0.7~32.9
Total	225 (100)	7.3 (4.2~11.8)	0~54.4

Single-factor analysis of variance and Bonferroni correction showed no significant differences among the five subgroups (F = 1.855; P = 0.119) and any two subgroups (P > 0.05).

VI (%)M (25%~75%), Vascular index (%) Median (25%~75%); ER, estrogen receptor; HER-2, human epidermal growth factor receptor-2.