Table 2.

Impact of potential risk factors other than methylation for EGFR and K-RAS mutations

EGFRK-RAS
Mu/WOR (95% CI)PMu/WOR (95% CI)P
Sex
    Male30/571.00 (reference)13/741.00 (reference)
    Female44/332.53 (1.35-4.77)0.0043/740.23 (0.06-0.84)0.027
Age
    1-y increase1.00 (0.97-1.03)0.9221.04 (0.98-1.10)0.229
Smoking
    Never52/261.00 (reference)3/751.00 (reference)
    Light11/150.37 (0.15-0.91)0.0312/242.08 (0.33-13.2)0.436
    Heavy11/490.11 (0.05-0.25)<0.00111/495.61 (1.49-21.1)0.011
  • NOTE: Mu, mutant type; W, wild-type.