Table 1 Demographic and clinical-pathological characteristics for the 728 under study according to treatment group
Open resection n = 364 | Laparoscopic resection n = 364 | P | |
|---|---|---|---|
Age, years, mean ± SD | 66.9 ± 10.6 | 66.5 ± 10.8 | 0.566 |
Male gender | 211 (58) | 196 (53.8) | 0.269 |
Tumour location | 0.354 | ||
Right colon | 138 (37.9) | 134 (36.8) | |
Left colon | 104 (28.6) | 121 (33.3) | |
Rectum | 122 (33.5) | 109 (29.9) | |
BMI, kg/m2, mean ± SD | 26.0 ± 4.1 | 25.2 ± 3.6 | 0.036 |
ASA ≥ 3 | 86 (23.7) | 90 (24.7) | 1 |
Preoperative Hb level, g/dL, mean ± SD | 13.3 ± 1.8 | 13.3 ± 1.8 | 0.812 |
Presence of preoperative anaemia | 0.796 | ||
None | 221 (60.7) | 228 (62.6) | |
Mild | 99 (27.2) | 91 (25) | |
Moderate | 44 (12.1) | 45 (12.4) | |
Preoperative RBC transfusions | 0.962 | ||
None | 350 (96.2) | 349 (95.9) | |
One–two | 6 (1.6) | 7 (1.9) | |
Three or more | 8 (2.2) | 8 (2.2) | |
UICC-R status | 1 | ||
R0 | 356 (97.8) | 356 (97.8) | |
R1 | 6 (1.6) | 6 (1.6) | |
R2 | 2 (0.5) | 2 (0.5) | |
Depth of tumour invasion | 0.110 | ||
≤ pT2a | 194 (53.3) | 199 (54.7) | |
pT3 | 109 (29.8) | 123 (33.8) | |
pT4 | 61 (16.7) | 42 (11.5) | |
Nodal involvement | 0.914 | ||
pN0 | 203 (67.7) | 215 (70.0) | |
pN1 | 73 (24.3) | 69 (22.5) | |
pN2 | 24 (8.0) | 23 (7.5) | |
AJCC TNM stage | 0.926 | ||
Stage 0–Ia | 171 (46.9) | 180 (49.4) | |
Stage II | 95 (26.1) | 92 (25.3) | |
Stage III | 98 (26.9) | 92 (25.2) | |