Table 6.
Variables needed to score four post-operative scoring systems
| Scoring system | Variables required |
| Cook and Day18 | Age, ASA, gender, ICU admission, invasive monitoring. |
| Mannheim Peritonitis Index 28 | Age, gender, presence of organ failure/cancer, duration of pre-op peritonitis, origin of sepsis, nature of peritonitis/exudate. |
| Surgical Risk Score47 | ASA, NCEPOD score, BUPA score |