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IRI score.
| National Nosocomial Infections Surveillance |
|---|
| ASA Score |
| 1-2: 0 points |
| 3-4: 1 point |
| Duration of surgery |
| <75%: 0 points |
| >75%∗: 1 point |
| Wound class |
| I-II∗∗: 0 points |
| III-IV∗∗∗: 1 point |
∗Above the threshold value of duration for that category of surgery (239 minutes); ∗∗clean, clean/contaminated; ∗∗∗contaminated, dirty/infected; IRI: Infection Risk Index; ASA score + duration of surgery + wound class = IRI score.
