Subdividing the total sample into early stage NSCLC (I-II) and late stage (III-IV) NSCLC, there was a significant difference in survival rates within the early-stage cases between low (median = 31.4 months) and high (median = 25.0 months) aromatase gene expression groups: Log Rank = 0.07; Mann-Whitney p = 0.016. This evidence concerns the gene CYP19A1 and non-small cell lung carcinoma.