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Table 2 The Identification of Risk in Surgical Patients (IRIS) Score elements

From: The impact of open versus closed format ICU admission practices on the outcome of high risk surgical patients: a cohort analysis

Variable Points
Age (years)  
0-32 0
33-52 1
53-69 2
> 69 3
Acute admission  
No 0
Yes 1
Acute surgery*  
No 0
Yes 1
Severity of surgery**  
0-3 0
4-7 1
  1. IRIS: Identification of Risk in Surgical patients
  2. * Surgery taking place within 24 h after admission
  3. ** Severity of surgery as defined by the Dutch Surgical Society classification of surgical procedures [22]