Table 3. Univariate and multivariate proportional hazards analyses of mortality in breast cancer patients according to MCT2 expression levels.

Variables	Univariate HR (95% CI)	P value	Multivariate HR (95% CI)	P value
MCT2 high-risk group (versus low-risk group)	2.22 (1.03–4.82)	0.043	3.59 (1.28–10.08)	0.016
Age (≥48 years old)*	0.76 (0.37–1.53)	0.440	0.47 (0.19–1.17	0.107
Tumour size (>2 cm)	4.83 (1.16–20.09)	0.031	4.00 (0.49–32.70)	0.199
Lymph-node status (per grade)†	2.36 (1.38–4.04)	0.002	3.87 (1.77–8.45)	0.001
Grade (per grade)	0.60 (0.31–1.16)	0.134	1.09 (0.51–2.34)	0.823
Estrogen-receptor positive stain (versus negative group)	0.40 (0.19–0.81)	0.012	0.10 (0.04–0.29)	<0.0001

CI, confidence interval; HR, hazard ratio. Bold entries indicate P value <0.05.

^*Median of age: 48 years old.

^†Lymph-node positive, 0:0, 1:1∼3, 2: >4.