Table 3 summarizes the statistically significant results. The full results are shown in Supplementary Table S1. Multivariate analyses showed the association between PFS and the ERCC1 rs11615 variant in LS-SCLC patients (hazard ratio [HR] 3.25, 95% CI 1.38–7.70; p = 0.007). This evidence concerns the gene ERCC1 and small cell lung carcinoma.