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Risk index scoring system for postoperative infection[11]
| A patient with an American Society of Anesthesiologists preoperative assessment score of 3, 4, or 5. |
| An operation classified as contaminated or dirty infected. [Does not apply to most obstetric patients.] |
| Operations lasting over T hours: for caesarean delivery T = 1 (where T is the accepted length of time for an uncomplicated caesarean delivery). |
