Table 2.
Comparison of crude rates of surgical site infection reported with Centers for Disease Control (CDC) 1992 definition and with ASEPSIS scoring method. Wounds were considered to be infected if they met the CDC criteria for either superficial or deep infection (top half of table) or if they met the criteria for deep infection only (bottom half of table). Values are numbers (percentages) of wounds, with 95% confidence intervals for percentages, adjusted for multiple wounds in the same patients
|
CDC results
|
|||
|---|---|---|---|
| ASEPSIS results | Uninfected | Infected | Total |
|
Wounds with superficial or deep infections according to CDC considered infected
| |||
| Uninfected (score ≤20) | 4660 (80.3) | 750 (12.9) | 5410 (93.2, 95% CI 92.5 to 93.9) |
| Infected (score >20) | 28 (0.5) | 366 (6.3) | 394 (6.8, 95% CI 6.1 to 7.5) |
| Total | 4688 (80.8, 95% CI 79.6 to 81.9) | 1116 (19.2, 95% CI 18.1 to 20.4) | 5804 (100) |
|
Wounds with deep infections only according to CDC considered infected
| |||
| Uninfected (score ≤20) | 5218 (89.9) | 192 (3.3) | 5410 (93.2, 95% CI 92.5 to 93.9) |
| Infected (score >20) | 179 (3.1) | 215 (3.7) | 394 (6.8, 95% CI 6.1 to 7.5) |
| Total | 5397 (93.0, 95% CI 92.3 to 93.7) | 407 (7.0, 95% CI 6.3 to 7.7) | 5804 (100) |
Agreement statistics: for top half of table, κ =0.43 (95% CI 0.40 to 0.46), Ppos=0.48 (0.45 to 0.52), Pneg=0.92 (0.92 to 0.93); for bottom half, κ=0.50 (0.46 to 0.55), Ppos=0.54 (0.49 to 0.58), Pneg=0.97 (0.96 to 0.97).