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Table 2 Comparison of clinical and pathological features in young (n = 53) versus older patients (n = 47) having colorectal cancer

From: Young patients with colorectal cancer have poor survival in the first twenty months after operation and predictable survival in the medium and long-term: Analysis of survival and prognostic markers

Variable   <40 years ≥50 years
Gender Male 26 (51%) 26(45%)
  Female 27 (49%) 21(55%)
Duration of symptoms* ≤ 3 months 22 (41.5%) 22 (47%)
  >3 months 31 (58.5%) 25 (53%)
Tumour Location Right colon (included 2 synchronous lesions in <40 year group) 10 (17.5%) 3 (6%)
  Left colon (included 2 synchronous lesions in <40 year group) 10 (17.5%) 13(28%)
  Rectal 37 (65%) 31 (66%)
Histological types Adenocarcinoma (included 4 synchronous lesions in the young) 48 (84%) 43 (92%)
  Mucinous 5 (9%) 2 (4%)
  Signet ring 4 (7.0%) 2 (4%)
Tumor grade Well 10 (18.9%) 2 (4%)
  Moderate 33 (62.2%) 43(92%)
  Poor 10 (18.9%) 2 (4%)
T stage T0/1 5 (9.2%) 2 (4%)
  T2 11 (20.4%) 9 (19%)
  T3 24 (44.4%) 28 (60%)
  T4 11 (20.4%) 8 (17%)
  No residual tumor after chemoradiation 3 (5.6%) Nil
N stage N0 28 (51.8%) 25(54.3%)
  N1 13 (24.1%) 8 (17.4%)
  N2 13 (24.1%) 13 (28.3%)
AJCC staging * I 7 (14.0%) 6 (12.8%)
  II 16 (32.0%) 20 (42.6%)
  III 24 (48.0%) 15 (31.9%)
  IV 3 (6.0%) 6 (12.8%)
Pre-operative CEA level (ng/ml) <5.0 17 (51.5%) 16 (34%)
  >5.0 16 (48.5%) 31(66%)
Resection margin # R0 40 (80.0%) 35 (74.5%)
  R1 10 (20.0%) 12 (25.5%)
  1. * Data were not available in one of the older group. # Data were not available in three young patients.