Breast-Conserving Surgery in Triple-Negative Breast Cancer: A Retrospective Cohort Study

Table 5

Univariate analysis of NAC efficacy (n, %).

Variable	Number	Effective	χ ^2
Ki-67			16.94	0.001
<30%	56	25 (44.6)
≥30%	70	56 (80.0)
Clinical stage			12.06	0.001
Stage I	38	33 (86.8)
Stage II	88	48 (54.5)
Tumor size			1.584	0.208
≤2 cm	55	32 (58.2)
>2 cm	71	49 (69.0)
Age			0.201	0.905
≤35 years	41	26 (63.4)
35–60 years	57	36 (63.2)
>60 years	28	19 (67.9)
Histological grade			4.931	0.085
Grade I	34	25 (73.5)
Grade II	68	45 (66.2)
Grade III	24	11 (45.8)