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Table 1 Basic characteristics of the sigmoid and rectal surgery groups

From: Risk factors for anastomotic leakage and its impact on long-term survival in left-sided colorectal cancer surgery

  Sigmoid surgery (n = 257) Rectal surgery (n = 643) p value
Age   65.4 ± 10.2 65.1 ± 10.9 0.172
BMI < 30 152 (63.1%) 472 (77.6%) 0.001
≥ 30 89 (36.9%) 136 (22.4%)
Gender Female 117 (45.5%) 300 (46.7%) 0.768
Male 140 (54.5%) 343 (53.3%)
ASA I–II 160 (65.3%) 430 (70.1%) 0.167
III–IV 85 (34.7%) 183 (29.9%)
CCI ≤ 5 180 (70.0%) 470 (73.1%) 0.365
> 5 77 (30.0%) 173 (26.9%)
T stage T0–T2 86 (33.5%) 215 (33.4%) 0.999
T3–T4 171 (66.5%) 428 (66.6%)
N stage 0 149 (59.4%) 392 (61.6%) 0.822
1 72 (28.7%) 172 (27.0%)
2 30 (12.0%) 72 (11.3%)
M stage 0 218 (84.8%) 592 (92.1%) 0.002
1 39 (15.2%) 51 (7.9%)
TNM stage 0 5 (1.9%) 7 (1.1%) 0.006
1 66 (25.7%) 160 (24.9%)
2 71 (27.6%) 198 (30.8%)
3 75 (29.2%) 227 (35.3%)
4 40 (15.6%) 52 (7.9%)
Approach of surgery Open 78 (30.4%) 364 (56.6%) 0.001
MI 179 (69.6%) 279 (43.4%)
Postoperative complications No 208 (80.9%) 413 (64.2%) 0.001
Yes 49 (19.1%) 230 (35.8%)
AL No 244 (94.9%) 574 (89.3%) 0.007
Yes 13 (5.1%) 69 (10.7%)
  1. ASA American Society of Anesthesiologists classification score, CCI Charlson comorbidity index score, MI minimally invasive, AL anastomotic leakage