1. Peritoneal wound drain, n = 105 | 7 (7) | Group 1 v. group 4 | 0.023 | 12 (11) | Group 1 v. group 4 | 0.84 |
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2. Perioneal wound drain, SC antibiotic powder, IV antibiotics, n = 70 | 10 (14) | Group 2 v. group 4 | 0.22 | 10 (14) | Group 2 v. group 4 | 0.67 |
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3. SC antibiotic powder, IV antibiotics, n = 254 | 57 (22) | Group 3 v. group 4 | 0.93 | 14 (6) | Group 3 v. group 4 | 0.06 |
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4. IV antibiotics, n = 67 | 16 (24) | Group 4 | — | 7 (10) | Group 4 | — |
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Total, n = 496 | 90 (18) | | | 43 (9) | | |