Parameter | Total | Anastomotic leakage (+) | Anastomotic leakage (−) | p |
---|---|---|---|---|
Number of patients | 154 | 18 | 136 | Â |
Gender, m/f, n (%) | 100/54 (65/35) | 18/0 (100/0) | 82/54 (60/40) | 0.0003 |
Age, yr., mean ± SD (median, range) | 67.1 ± 11.0 (69, 36–87) | 64.7 ± 7.3 (63, 52–72) | 67.4 ± 11.4 (70, 36–87) | 0.12 |
BMI, kg/m2, mean ± SD (median, range) | 23.0 ± 3.3 (22.9, 15.2–36.9) | 23.5 ± 3.7 (22.9, 15.2–28.6) | 22.9 ± 3.2 (22.9, 16.8–36.9) | 0.27 |
BMI, ≥ 25, n (%) | 38 (25) | 8 (44) | 30 (22) | 0.08 |
ASA | Â | Â | Â | 1.00 |
 1 | 22 (14) | 2 (11) | 20 (15) |  |
 2 | 121 (79) | 15 (83) | 106 (78) |  |
 3 | 11 (7) | 1 (6) | 10 (7) |  |
Tumor location (from the anal verge), n (%) | Â | Â | Â | 0.32 |
 Upper (10–15 cm) | 66 (43) | 5 (28) | 61 (45) |  |
 Middle (5–10 cm) | 56 (36) | 9 (50) | 47 (35) |  |
 Lower (< 5 cm) | 32 (21) | 4 (13) | 28 (21) |  |
Tumor size, mm, mean ± SD (median, range) | 39.7 ± 20.4 (38, 7–170) | 45.6 ± 19.3 (50, 7–80) | 38.9 ± 20.4 (35, 8–170) | 0.08 |
UICC-TNM Stage, n (%) | Â | Â | Â | 0.62 |
 0 | 2 (1) | 0 (0) | 2 (1) |  |
 I | 46 (30) | 6 (33) | 40 (29) |  |
 II | 40 (26) | 5 (28) | 35 (26) |  |
 III | 45 (30) | 3 (17) | 42 (31) |  |
 IV | 20 (13) | 4 (22) | 16 (12) |  |
 Unknown (CR case after preoperative chemotherapy) | 1 (1) | 0 (0) | 1 (1) |  |
T category, n (%) | Â | Â | Â | 0.65 |
 Tis | 2 (1) | 0 (0) | 2 (1) |  |
 T1 | 21 (14) | 2 (11) | 19 (14) |  |
 T2 | 36 (23) | 4 (22) | 32 (24) |  |
 T3 | 76 (49) | 11 (61) | 65 (48) |  |
 T4 | 16 (10) | 0 (0) | 16 (12) |  |
N category, n (%) | Â | Â | Â | 0.96 |
 N0 | 95 (62) | 11 (61) | 84 (62) |  |
 N1 | 40 (26) | 5 (28) | 35 (26) |  |
 N2 | 14 (9) | 2 (11) | 12 (9) |  |
 N3 | 5 (3) | 0 (0) | 5 (4) |  |
M category, n (%) | Â | Â | Â | 0.26 |
 M0 | 134 (87) | 14 (78) | 120 (88) |  |
 M1 | 20 (13) | 4 (22) | 16 (12) |  |
Preoperative chemotherapy, n (%) | 11 (7) | 1 (6) | 10 (7) | 1.00 |
Preoperative decompression, n (%) | 2 (1) | 0 (0) | 2 (1) | 1.00 |
WBC, × 102/μl, mean ± SD | 63.5 ± 16.3 | 69.7 ± 15.2 | 62.7 ± 16.3 | 0.09 |
Plt, × 104/μl, mean ± SD | 24.5 ± 6.7 | 26.4 ± 10.6 | 24.2 ± 6.0 | 0.19 |
Creatinine, mg/dl, mean ± SD | 0.83 ± 0.28 | 1.05 ± 0.51 | 0.80 ± 0.23 | <  0.001 |
Total cholesterol, mg/dl, mean ± SD | 192 ± 38 | 177 ± 52 | 194 ± 36 | 0.10 |
Triglyceride, mg/dl, mean ± SD | 122 ± 65 | 128 ± 68 | 122 ± 65 | 0.72 |
Total protein, g/dl, mean ± SD | 7.5 ± 5.4 | 7.0 ± 0.4 | 7.5 ± 5.8 | 0.70 |
Albumin, g/dl, mean ± SD | 4.4 ± 3.6 | 3.9 ± 0.5 | 4.4 ± 3.8 | 0.58 |
Blood sugar, mg/dl, mean ± SD | 111 ± 33 | 127 ± 44 | 109 ± 31 | 0.06 |
Any comorbidity, n (%) | 114 (74) | 16 (89) | 98 (72) | 0.16 |
 Hypertension, n (%) | 74 (48) | 9 (50) | 65 (48) | 1.00 |
 Ischemic Heart Disease, n (%) | 13 (8) | 6 (33) | 7 (5) | 0.001 |
 Arrhythmia, n (%) | 6 (4) | 1 (6) | 5 (4) | 0.47 |
 Cerebrovascular Disease, n (%) | 9 (6) | 3 (17) | 6 (4) | 0.07 |
 Asthma, n (%) | 5 (3) | 1 (6) | 4 (3) | 0.47 |
 COPD, n (%) | 5 (3) | 0 (0) | 5 (4) | 1.00 |
 Diabetes Mellitus, n (%) | 37 (24) | 7 (39) | 30 (22) | 0.14 |
 Dyslipidemia, n (%) | 28 (18) | 1 (6) | 27 (20) | 0.20 |
Smoking, n (%) | 33 (21) | 4 (22) | 29 (21) | 1.00 |
The use of antiplatelet and/or anticoagulant agent, n (%) | 28 (18) | 6 (33) | 22 (16) | 0.10 |
Type of operation | Â | Â | Â | 0.02 |
 High anterior resection | 44 (29) | 1 (6) | 43 (32) |  |
 Low anterior resection | 110 (71) | 17 (94) | 93 (68) |  |
High tie, n (%) | 98 (64) | 9 (50) | 89 (65) | 0.21 |
D | Â | Â | Â | 0.42 |
 2 | 47 (30) | 7 (39) | 40 (29) |  |
 3 | 107 (70) | 11 (61) | 96 (71) |  |
LN harvested, mean ± SD (median, range) | 15.8 ± 7.6 (15, 2–40) | 13.8 ± 5.3 (13, 5–23) | 16.0 ± 7.9 (16, 2–40) | 0.42 |
LN metastasized, mean ± SD (median, range) | 1.6 ± 3.5 (0, 0–23) | 1.4 ± 2.7 (0, 0–11) | 1.6 ± 3.6 (0, 0–23) | 0.97 |
Cur | Â | Â | Â | 0.20 |
 A | 134 (87) | 14 (78) | 120 (88) |  |
 B | 4 (3) | 0 (0) | 4 (3) |  |
 C | 16 (10) | 4 (22) | 12 (9) |  |
Number of stapler firings, mean ± SD (median, range) | 1.3 ± 0.5 (1, 1–3) | 1.5 ± 0.5 (1, 1–2) | 1.3 ± 0.5 (1, 1–3) | 0.06 |
Number of stapler firings, ≥ 2 times (%) | 46 (30) | 9 (50) | 37 (27) | 0.06 |
Air leak test, n (%) | 124 (81) | 15 (83) | 109 (80) | 1.00 |
Air leak, air leak / air leak test (%) | 4/124 (3) | 1/15 (7) | 3/109 (2) | 0.33 |
Operative time, min, mean ± SD (median, range) | 280 ± 93 (265, 134–692) | 332 ± 118 (312, 160–631) | 273 ± 87 (262, 134–692) | 0.03 |
Post meridiem operation, n (%) | 26 (17) | 5 (28) | 21 (15) | 0.19 |
Operative blood loss, ml, mean ± SD (median, range) | 84 ± 145 (25, 0–995) | 131 ± 169 (60, 0–560) | 78 ± 140 (20, 0–995) | 0.07 |
Blood transfusion, n (%) | 9 (6) | 1 (6) | 8 (6) | 1.00 |
Temporary loop ileostomy, n (%) | 23 (15) | 2 (11) | 21 (15) | 1.00 |
Placement of transanal drain, n (%) | 56 (36) | 11 (61) | 45 (33) | 0.03 |
Postoperative stay, day, mean ± SD (median, range) | 14.2 ± 11.6 (10, 7–77) | 36.2 ± 19.4 (29, 10–77) | 11.3 ± 5.7 (10, 7–43) | <  0.01 |