Table 1 Background characteristics and tumour pathology in patients who received adjuvant chemotherapy and in age/sex-matched historical controls
|  | Chemotherapy Group N = 95 | Control group N = 87 | Chi2 p |
|---|---|---|---|
Age (mean, SD) | 64.1 (9.5) | 63.6 (10.6) | -- |
Male | 49 (52) | 45 (52) | -- |
Tumour site right colon | 50 (53) | 40 (46) | 0.37 |
Size ≥ 5 cm | 43 (45) | 43 (49) | 0.57 |
Tumour spread beyond muscularis propria | 84 (88) | 80 (92) | 0.43 |
Mucinous or signet ring adenocarcinoma | 16 (17) | 10 (12) | 0.30 |
≥ 4 lymph nodes involved | 26 (27) | 26 (30) | 0.70 |
Apical node involved | 11 (12) | 11 (13) | 0.83 |
High grade tumour | 34 (36) | 31 (36) | 0.98 |
Venous invasion present | 20 (21) | 23 (26) | 0.39 |
Free serosal surface involved | 22 (23) | 23 (26) | 0.61 |
Adjacent structure infiltrated | 6 (6) | 4 (5) | 0.75* |