Table 1.

Patient characteristics according to EPO and EPO-R expression levels in tumor cells (high level of expression versus other groups)

EPO (%)
EPO-R (%)
Low or negativeHighPLow or negativeHighP
n (%)102 (64.6)56 (35.4)125 (79.1)33 (20.9)
Age (mean ± SD)64.5 ± 9.763.5 ± 10.50.5864.0 ± 10.364.8 ± 8.90.69
Gender0.270.35
    Male67.658.966.457.6
    Female32.441.133.642.4
Ethnic origin0.300.08
    Caucasian85.391.184.897.0
    Other14.78.915.23.0
Smoker0.030.57
    No17.65.414.49.1
    Yes82.494.685.690.9
Histology0.390.05
    Adenocarcinoma41.233.943.221.2
    Squamous cell carcinoma30.441.130.448.5
    Other28.425.026.430.3
T stage0.940.17
    T147.146.449.636.4
    T252.953.650.463.6
  • NOTE: EPO negative or low = 0 or 1 values of EPO; EPO high = 2 values of EPO; EPO-R negative or low = 0 or 1 values of EPO-R; EPO-R high = 2 values of EPO-R.