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The relationship between ECOG PS and PFS (A), with P-value <0.001. Patients with smoking history have poorer PFS (B), with P-value <0.001. The relationship between No. of metastases and PFS (C), with P-value of 0.012. The relationship between short-term efficacy and PFS (D). No people reached CR, people who reached PR had better PFS results than people who suffered SD and PD, with P-value <0.001.
