Table 1

Univariate analysis of RASSF1A methylation in 204 primary NSCLC

MethylationPa
Absent (n = 139)Present (n = 65)
Ageb67 ± 1065 ± 110.75
Sex
 Male8244
 Female57210.23
Pack-yearsb57 ± 4361 ± 370.51
Years smokedb37 ± 1740 ± 150.16
Starting ageb25 ± 719 ± 80.001
Smoking status
 Never163
 Current5626
 Ex-smoker67360.25
Histologyc
 Adenoca6241
 Squamous5319
 Others2240.03
  • a Ps; Wilcoxon’s rank-sum test for continuous variables and of Fisher’s exact (or χ2) test for categorical variables.

  • b Mean ± SD.

  • c Histology data are missing for three patients.