Table 3.
Postoperative complications and recovery of patients with low rectal cancer
| Characteristics | Underweight (n = 53) |
Normal weight (n = 589) |
Overweight (n = 336) |
Obesity (n = 61) |
P value |
|---|---|---|---|---|---|
| Postoperative complications | |||||
| 30-d Postoperative complications, No. (%) | 8 (15.1) | 71 (12.1) | 64 (19.0) | 7 (11.5) | 0.030 |
| Type of postoperative complications, No. (%) a | |||||
| Presacral hemorrhage | 0 | 2 (0.3) | 0 | 0 | 0.633 |
| Active intraabdominal bleeding | 2 (3.8) | 1 (0.2) | 2 (0.6) | 1 (1.6) | 0.014 |
| Anastomotic bleeding | 1 (1.9) | 2 (0.3) | 2 (0.6) | 0 | 0.286 |
| Anastomotic leakage | 3 (5.7) | 14 (2.4) | 9 (2.7) | 0 | 0.264 |
| Chylous leakage | 0 | 3 (0.5) | 1 (0.3) | 0 | 1.000 |
| Ileus | 1 (1.9) | 13 (2.2) | 8 (2.4) | 3 (4.9) | 0.536 |
| Incision complications | 0 | 16 (2.7) | 19 (5.7) | 1 (1.6) | 0.057 |
| Stoma-related complications | 1 (1.9) | 0 | 1 (0.3) | 0 | 0.045 |
| Urinary disorder | 0 | 9 (1.5) | 5 (1.5) | 1 (1.6) | 1.000 |
| Urinary tract infection | 1 (1.9) | 3 (0.5) | 5 (1.5) | 0 | 0.253 |
| Cardiovascular event | 0 | 1 (0.2) | 5 (1.5) | 0 | 0.117 |
| Pneumonia | 0 | 7 (1.2) | 4 (1.2) | 1 (1.6) | 0.890 |
| Others | 1 (1.9) | 10 (1.7) | 11 (3.3) | 2 (3.3) | 0.340 |
| Clavien-Dindo classification, No. (%) | 0.040 | ||||
| I-II | 7 (13.2) | 68 (11.5) | 56 (16.7) | 7 (11.5) | |
| IIIa-IVa | 1 (1.9) | 3 (0.5) | 8 (2.4) | 0 | |
| Re-operation, No. (%) | 1 (1.9) | 4 (0.6) | 8 (2.4) | 0 | 0.057 |
| 30-d Mortality, No. (%) | 0 | 0 | 0 | 0 | NA |
| Postoperative recovery | |||||
| Time to first flatus (h), median (IQR) |
41.8 (17.5, 51.38) |
40.5 (18.7, 64.2) |
41.9 (20.4, 65.6) |
42.9 (34.8, 65.2) |
0.407 |
| Time to first defecation (h), median (IQR) |
68.5 (22.7, 92.0) |
62.5 (30.0, 98.9) |
64.3 (28.7, 105.0) | 64.1 (45.1, 115.5) | 0.550 |
| Time to liquid diet (h), median (IQR) |
42.6 (22.2, 69.7) |
44.9 (20.6, 71.6) |
63.7 (32.0, 90.3) |
65.1 (39.8, 96.5) |
0.014 |
| Time to normal diet (h), median (IQR) |
121.2 (68.9, 160) |
115.88 (69.5, 166.7) |
126.8 (70.1, 165.0) |
131.5 (89.7, 64.1) |
0.828 |
| Postoperative hospital stay < 14 (d), No. (%) | 44 (83.0) | 509 (86.4) | 272 (81.0) | 53 (86.9) | 0.155 |
| Duration of hospitalization (d), median (IQR) | 8 (7, 12) | 8 (6, 11) | 8 (7, 12) | 9 (7, 11) | 0.002 |
a The number of individual complications exceeded the total number of complications because patients may have had 2 or more complications