Fig. 6
Kaplan-Meier survival curves of outcomes among pure small cell type and mixed cell type in the 128 SCCB patients. The mixed cell type group survival rates of 1, 2, 3 years are 70.4, 50.0, 25.0%, respectively. The pure small cell type group survival rates of 1, 2, 3 years are 47.5, 24.2, 13.6%, respectively. The mean survival time of the two groups was 23.5 and 18 months, respectively. There was statistically difference between the two groups (Log-rank test, X 2 = 5.547, P = 0.019)