Table 3.

Cox’s proportional hazard regression model for breast cancer–specific survival (BCSS) by subtype and menopausal status

Subtype	Breast cancer-specific mortality
	Overall			Pre-menopausal			Post-menopausal
	Total	Deaths	HR	Total	Deaths	HR	Total	Deaths	HR
Luminal-A	90	2		42	1		48	1
<24	35	0	1	19	0	1	16	0	1
≥24	55	2	53.033	23	1	105.823	32	1	38.408
P	P = 0.512			P = 0.095			P = 0.376
Luminal-B(HER2−)	591	58		282	8		309	20
<24	236	21	1	139	3	1	97	18	1
≥24	355	37	1.579	143	5	5.170	212	32	1.221
P	P = 0.049			P = 0.075			P = 0.661
Luminal-B(HER2+)	116	12		74	10		42	2
<24	55	3	1	39	3	1	26	0	1
≥24	61	9	1.653	35	7	0.850	16	2	42.807
P	P = 0.491			P = 0.862			P = 0.551
HER2 overexpression	239	36		124	28		115	8
<24	101	9	1	55	5	1	46	4	1
≥24	138	27	2.966	69	23	4.305	69	4	1.196
P	P = 0.007			P = 0.004			P = 0.985
Triple negative	189	63		118	58		71	5
<24	79	24	1	48	22	1	31	2	1
≥24	110	39	2.035	70	36	1.775	40	3	2.151
P	P = 0.018			P = 0.048			P = 0.372

Abbreviations: BCSS, breast cancer-specific survival; HR, hazard ratio.