6.

Kaplan-Meier's survival analysis curve for miR-155 serum expression characteristic (fold regulation) in advanced stage NSCLC with positive EGFR gene mutation. A: EGFR positive (Log-rank test, P=0.023). Median survival: High (equal or more higher than median): 58 d; Low (less than median): 332 d; 1 year survival rate: High (equal or more higher than median): 20.0%; Low (less than median): 80.0%. B: EGFR positive (Log-rank test, P=0.657). Median survival: High (equal or more higher than median): 92 d; Low (less than median): 70 d; 1 year survival rate: High (equal or more higher than median): 46.2%; Low (less than median): 43.8%.