TABLE 3.

Stratified survival analysis of GSE2549.

Variable	Low risk	High risk	P-value	HR (95% CI)
Histological subtype
Epithelial	15	8	0.0006	4.444(1.254−15.75)
Mixed	5	11	0.5396	1.390(0.4759−4.058)
N stage
N0	6	2	0.0473	5.486(0.3636−82.78)
N +	14	17	0.001	3.242(1.465−7.171)
Brigham stage
I + II	6	6	0.0138	4.529(1.098−18.69)
III + IV	14	13	0.0012	3.485(1.391−8.727)

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