|  | Larger studies Postoperative, noncancer | Smaller studies Predominantly cancer | Prospective cancer studies | Retrospective cancer studies | ||||
---|---|---|---|---|---|---|---|---|---|
Infection | Outcome | patients | Result | patients | Result | patients | Result | patients | Result |
Deep infection | Percent of patients | 15/3125 | 0.48 | 42/1503 | 2.8 | 2/414 | 0.48 | 39/979 | 4.0 |
 | Incidence per 1000 days |  | 0.45 |  | 0.41 |  | 0.08 |  | 0.50 |
Superficial infection | Percent of patients | 87/3125 | 2.8 | 107/1110 | 9.6 | 11/275 | 4.0 | 61/725 | 8.4 |
 | Incidence per 1000 days |  | 3.4 |  | 1.3 |  | 0.74 |  | 0.95 |
Overall infection | Percent of patients | 114/3125 | 3.6 | 143/1110 | 13 | 11/275 | 4.0 | 74/725 | 10 |
 | Incidence per 1000 days |  | 4.3 |  | 1.8 |  | 0.74 |  | 1.2 |