Control CRC stage        
      IIa Ilb Ilc IIIa IIIb IV
Total   63 25 3 1 21 9 13
Gender Male 34 19 2 0 13 6 6
  Female 29 6 1 1 8 3 7
Age Mean 62.9 67.9 69.0 58.0 63.0 60.0 68.2
  S.D. 13.7 10.6 2.0 - 18.1 13.7 8.5
Cancer location Ascending colon - 2 1 0 2 1 2
  Transverse colon - 2 0 0 2 0 2
  Descending colon - 4 0 0 0 1 2
  Sigmoid colon - 11 1 1 7 0 2
  Cecum - 1 0 0 0 0 0
  Rectum - 5 1 0 10 7 5
Patients with a previous history of CRC or a previous or current diagnosis of cancer other than CRC were excluded.
Table 1: Information about CRC patients and controls.