Polymorphic status of p53 codon 72 or MDM2 SNP309 does not affect overall survival of female non-smoker lung cancer patients. A-B. Kaplan-Meier overall survival curves for all patients with different p53 (A) or MDM2 (B) genotypes. No significant differences were noted with respective to the different MDM2 or p53 genotypes alone or in combination. n = 21 for Arg/Arg, n = 16 for Pro/Pro and n = 47 for Arg/Pro and n = 22 for T/T, n = 19 for G/G and n = 54 for G/T.