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Table 1 Summary of rectal cancer study cohorts

From: Copy number alterations and allelic ratio in relation to recurrence of rectal cancer

  Discovery cohort (FF) Validation cohort (FFPE)
  N = 112 Perc. N = 95 Perc.
Age at surgery     
<50 14 13% 4 4%
50-75 72 64% 72 76%
≥75 26 23% 19 20%
Gender     
Male 73 65% 57 60%
Female 39 35% 38 40%
TNM stage     
Stage I 11 10% 7 7%
Stage II 24 21% 21 22%
Stage III 77 69% 67 71%
CRM involvement     
No 82 73% 56 59%
Yes 30 27% 39 41%
Recurrence     
No recurrence 46 41% 37 39%
Locala,b 10 9% 12 13%
Distantb 41 37% 24 25%
Local & Distanta,b 15 13% 22 23%
  1. Abbreviations: aAll available patients with fresh frozen/FFPE tumor and normal tissue specimens were included; bPatients with a recurrence were matched to patients without a recurrence based on the matching criteria TNM stage, CRM involvement, gender, and age at surgery; N = Number of patients; Perc. = Percentage of total patients.