Allele frequency and results of logistic regression analysis corresponding to the p.I171V, c.657del5 and p.R215W variants of the NBN gene in the group of patients with lung cancer (N=453) vs. controls (p.I171V, N=2,400; c.6578del5, N=2,090; p.R215W, N=498). P<0.05 was considered to indicate a statistically significant difference. OR, odds ratio; NBN, nibrin; *P<0.0001 vs control.