Table 1.
Baseline characteristics by body mass index (BMI)
| Variables | Total (n = 737) | BMI ≥ 30 (n = 490) | BMI < 30 (n = 247) | p-value |
|---|---|---|---|---|
| Age, years (mean ± sd) | 67.0 ± 13.9 | 69.7 ± 12.5 | 64.4 ± 13.2 | < 0.01 |
| Sex (male, %) | 389 (53) | 150 (60) | 114 (46) | 0.01 |
| Comorbidities (n for yes, %) | ||||
| Smoking | 285 (39) | 191 (39) | 94 (38) | 0.90 |
| Hypertension | 359 (49) | 223 (46) | 136 (55) | 0.01 |
| Ischaemic heart disease | 159 (22) | 91 (19) | 68 (28) | < 0.01 |
| Diabetes | 139 (19) | 77 (16) | 62 (25) | < 0.01 |
| Respiratory disease | 111 (15) | 56 (11) | 55 (22) | < 0.01 |
| Use of antiplatelet therapy | 83 (11) | 60 (12) | 23 (9) | 0.03 |
| Surgical approach (number, %) | 0.64 | |||
| Laparoscopic | 462 (63) | 304 (62) | 158 (64) | |
| Open | 167 (23) | 116 (24) | 51 (21) | |
| Conversion from lap to open | 108 (15) | 70 (14) | 38 (15) | |
| Operative urgency (n, %) | 0.11 | |||
| Elective | 460 (62) | 296 (60) | 164 (66) | |
| Emergency | 277 (38) | 194 (40) | 83 (34) | |
| ASA (n, %) | < 0.01 | |||
| 1 | 28 (4) | 26 (5) | 2 (1) | |
| 2 | 243 (33) | 170 (35) | 73 (29) | |
| 3 | 407 (55) | 259 (53) | 148 (60) | |
| 4 | 59 (8) | 35 (7) | 24 (10) | |
| Operation type (n, %) | 0.61 | |||
| Right/transverse hemicolectomy | 375 (51) | 247 (51) | 128 (52) | |
| High anterior resection/Left hemicolectomy/Hartmanns | 286 (39) | 192 (39) | 94 (38) | |
| Total/subtotal colectomy | 51 (10) | 51 (10) | 25 (10) |