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

Table 7

Univariate analysis of prognosis and overall survival rate (n, %).

Variable	Number	Good prognosis	χ^2		Number	OS	χ^2
Ki-67			44.59	0.001			14.65	0.001
<30%	56	52 (92.9)			56	48 (85.7)
≥30%	70	24 (34.3)			70	42 (60.0)
Clinical stage			4.061	0.044			3.447	0.063
Stage I	38	28 (73.7)			38	32 (84.2)
Stage II	88	48 (54.5)			88	58 (65.9)
Tumor size			10.50	0.001			11.32	0.001
≤2 cm	55	42 (76.4)			55	47 (85.5)
>2 cm	71	34 (47.9)			71	43 (60.6)
Age			0.517	0.772			1.489	0.475
≤35 years	41	23 (56.1)			41	30 (73.2)
35–60 years	57	35 (61.4)			57	38 (66.7)
>60 years	28	18 (64.3)			28	22 (78.6)
Histological grade			0.561	0.755			0.344	0.842
Grade I	34	19 (55.9)			34	23 (67.6)
Grade II	68	43 (63.2)			68	50 (73.5)
Grade III	24	14 (58.3)			24	17 (78.6)
Curative effect			0.003	0.957			0.075	0.784
Invalid	45	27 (60.0)			45	31 (68.9)
Valid	81	49 (60.5)			81	59 (72.8)
Ki-67 variation			16.52	0.001			4.847	0.028
Nondecline	46	17 (37.0)			46	28 (60.9)
Decline	80	59 (73.8)			80	62 (77.5)