Table 2.
Intraoperative variables.
| Anemia group (n = 154) | Nonanemia group (n = 172) | P value | |
|---|---|---|---|
| Operative time | 140 (120–180) | 138 (115–180) | 0.90 |
| Estimated blood loss | 100 (80–150) | 100 (50–150) | 0.41 |
| Perioperative RBC transfusion, n (%) | 40 (25.9%) | 3 (1.7%) | <0.01 |
| Units of RBC transfusion | 3 (2–6) | 4 (2–4) | <0.01 |
| Types of operation, n (%) | <0.01 | ||
| Laparoscopic surgery† | 60 (39%) | 109 (63%) | |
| Open surgery | 94 (61%) | 63 (37%) | |
| Surgical procedure, n (%) | <0.01 | ||
| Colon resection | 93 (60%) | 38 (22%) | |
| Rectum resection | 61 (40%) | 135 (78%) | |
| Stoma formation, n (%) | 36 (23%) | 51 (30%) | 0.20 |
| Maximum diameter of cancer (cm) | 0.02 | ||
| <4 cm | 47 (31%) | 75 (44%) | |
| ≥4 cm | 107 (69%) | 97 (56%) | |
| T stage, n (%) | 0.25 | ||
| T1 | 4 (3%) | 6 (4%) | |
| T2 | 19 (12%) | 35 (20%) | |
| T3 | 98 (64%) | 98 (57%) | |
| T4 | 33 (21%) | 33 (19%) | |
| Number of nodal harvest | 9 (6–12) | 7 (4–11) | <0.01 |
| Patients with nodal metastasis, n (%) | 52 (34%) | 70 (41%) | 0.31 |
| TNM stage, n (%) | 0.58 | ||
| I/II | 96 (62%) | 102 (59%) | |
| III/IV | 58 (38%) | 70 (41%) |
†Included laparoscopy-assisted and hand-assisted laparoscopic colorectal resection for colorectal cancer (CRC).