Table 3.

Subgroup analysis of patients with 1%≤ER < 10% expression (n = 171)

	TTR		OS
Variable	HR (95% CI)	P value	HR (95% CI)	P value
Clinical stage
Stage III	(reference)		(reference)
Stage II	0.38 (0.21–0.67)	<0.001	0.22 (0.11–0.45)	<0.001
Pathological response
pCR	(reference)		(reference)
Non-pCR	3.79 (1.47–9.74)	0.006	4.55 (1.37–15.08)	0.01
LVI
Negative	(reference)		(reference)
Positive	2.22 (1.24–3.97)	0.007	1.93 (1.00–3.68)	0.048
Adjuvant hormonal therapy
No	(reference)		(reference)
Yes	0.88 (0.48–1.60)	0.67	0.65 (0.32–1.36)	0.25

Multivariate Cox regression analysis of time to recurrence (TTR) and overall survival (OS).

HR, hazard ratio; CI, confidential interval; pCR, pathological complete response; LVI, lymphovascular invasion.