Characteristics | Total (n = 70) | Rectum (n = 18) | Colon (n = 52) | P |
---|---|---|---|---|
Age at operation (years, mean ± SD) | 54.5 ± 11.6 | 52.7 ± 12.2 | 55.2 ± 11.6 | 0.451 |
Sex (%) | Â | Â | Â | 0.571 |
 Male | 39 (55.7) | 9 (50.0) | 30 (57.7) |  |
 Female | 31 (44.3) | 9 (50.0) | 22 (42.3) |  |
Body mass index (kg/m2, mean ± SD) | 22.7 ± 3.6 | 23.8 ± 3.9 | 22.8 ± 3.5 | 0.665 |
Comorbidity | 18 (25.7) | 4 (22.2) | 14 (26.9) | 0.936 |
 Hypertension | 10 (14.3) | 2 (11.1) | 8 (15.4) |  |
 Diabetes | 6 (8.6) | 2 (11.1) | 4 (7.7) |  |
 Coronary heart disease | 2 (2.9) | 1 (5.5) | 1 (1.9) |  |
 Arrhythmia | 4 (5.7) | 0 (0) | 4 (7.7) |  |
 Others | 6 (8.6) | 1 (5.5) | 5 (9.6) |  |
Preoperative chemotherapy (%) | Â | Â | Â | 0.477 |
 Presence | 30 (42.9) | 9 (50.0) | 21 (40.4) |  |
 Absence | 40 (57.1) | 9 (50.0) | 31 (59.6) |  |
Presentation of PM (%) | Â | Â | Â | 0.118 |
 Synchronous | 42 (60.0) | 8 (44.4) | 34 (65.4) |  |
 Metachronous | 28 (40.0) | 10 (55.6) | 18 (34.6) |  |
T stage | Â | Â | Â | 0.954 |
 T1–T2 | 5 (11.9) | 1 (12.5) | 4 (11.8) |  |
 T3–T4 | 37 (88.1) | 7 (87.5) | 30 (88.2) |  |
N stage | Â | Â | Â | 0.482 |
 N0 | 2 (4.8) | 0 (0) | 2 (5.9) |  |
 N1–N2 | 40 (95.2) | 8 (100.0) | 32 (94.1) |  |
Preoperative CEA level (ng, mean ± SD) | 31.9 ± 61.5 | 16.6 ± 27.2 | 37.2 ± 69.8 | 0.290 |
Preoperative CA19-9 level (ng, mean ± SD) | 75.4 ± 93.3 | 69.2 ± 112.4 | 77.5 ± 88.4 | 0.780 |
Histology (%) | Â | Â | Â | 0.275 |
 Adenocarcinoma | 43 (61.4) | 13 (72.2) | 30 (57.7) |  |
 Mucinous | 27 (38.6) | 5 (27.8) | 22 (42.3) |  |
Tumour grade | Â | Â | Â | 0.370 |
 Moderate | 26 (37.1) | 8 (44.4) | 17 (32.7) |  |
 Poor | 44 (62.9) | 10 (55.6) | 35 (67.3) |  |
Adjuvant chemotherapy | Â | Â | Â | 0.924 |
 Presence | 55 (78.6) | 14 (77.8) | 41 (78.8) |  |
 Absence | 15 (21.4) | 4 (22.2) | 11 (21.2) |  |
BRAF status | Â | Â | Â | 0.809 |
 Mutation | 13 (18.6) | 3 (16.7) | 10 (19.2) |  |
 No mutation | 57 (81.4) | 15 (83.3) | 42 (80.8) |  |
MSI | Â | Â | Â | 0.961 |
 MSI-H | 8 (11.4) | 2 (11.1) | 6 (11.5) |  |
 MSS | 62 (88.6) | 16 (88.9) | 46 (88.5) |  |