Table 3.

Final multivariate model of breast cancer specific survival

Variable	n	Deaths due to breast cancer (n)	Hazard ratio (95% CI)	P
BRCA1 mutation
No mutation	397	52	1.00	0.01
BRCA1	37	14	2.39 (1.20–4.75)
Tumor size
< 2 cm	333	39	1.00	0.003
≥ 2 cm	101	27	2.19 (1.30–3.67)
Axillary node
Negative	280	31	1.00	0.03
Positive	154	35	1.78 (1.07–2.96)
Age (years)
< 50	146	34	1.00	0.02
≥ 50	288	32	0.55 (0.33–0.92)

CI, confidence interval