TABLE 1.

Univariate and multivariate survival analysis of GSE2549.

	Univariate analysis			Multivariate analysis
Variable	N	P-value	HR (95% CI)	P-value	HR (95% CI)
Histological subtype
Epithelial	23	0.038	2.232 (1.047–4.759)	0.717	0.834 (0.312–2.226)
Mixed	16
Node status
N0	8	0.045	2.945 (1.025–8.461)	0.089	3.060 (0.843–11.106)
N +	31
Margins
Negative	5	0.347	1.771 (0.538–5.832)	0.179	2.703 (0.634–11.529)
Positive	34
Brigham stage
Stage1 + 2	12	0.394	1.404 (0.644–3.064)	0.628	0.784 (0.292–2.101)
Stage3 + 4	27
Risk score
Low-risk	20	<0.0001	4.963 (2.190–11.247)	<0.001	5.995 (2.178–16.502)
High-risk	19

N, number; HR, hazard ratio; CI, confidence interval. *One patient was not included in the univariate and multivariate analysis of the GSE2549 dataset, as the clinical information was not available. All P values in bold were less than 0.05 which were considered statistically significant.