NSCLC patients with ATM rs664143 GA and AA genotypes showed worse DFS (stage IIIA: adjusted HR = 1.34, 95%CI = 1.18–2.05, P = 0.022; stage IIIB: adjusted HR = 1.52, 95%CI = 1.04–2.22, P = 0.030) and OS (stage IIIA: adjusted HR = 1.29, 95%CI = 1.18–2.09, P = 0.028; stage IIIB: adjusted HR = 1.51, 95%CI = 1.17–2.37, P = 0.021) than patients with the rs664143 GG genotype. The gene discussed is ATM; the disease is non-small cell lung carcinoma.