Estimate disease severity in acute pancreatitis.

The global unit selector only affects unanswered questions
1.Elevated Urea?
2.≥2 SIRS Criteria?
4.Pleural Effusion Present?
5.Impaired Mental Status?
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1. Elevated Urea?

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About this Calculator

The BISAP score allows for early identification of patients at increased risk for in-hospital mortality. The score was developed using data collected from approximately 18,000 cases of acute pancreatitis from more than 200 hospitals between 2000 and 2001. The scoring system was validated in an additional 18 thousand cases from 177 hospitals between 2004 and 2005.

The accuracy of the scoring system for prediction of mortality was measured by the area under the receiver operating characteristic curve (AUC) and by comparing it with the Acute Physiology and Chronic Health Examination (APACHE) II.

5 variables measured within the 1st 24 hours were found to be predictive of in-hospital mortality:

  • Blood urea nitrogen (BUN) >25 mg/dl
  • Impaired mental status
  • Systemic inflammatory response syndrome (SIRS)
  • Age >60 years
  • Presence of a pleural effusion

In the validation cohort, the BISAP AUC was 0.82 (95% CI 0.79 to 0.84) compared to APACHE II AUC of 0.83 (95% CI 0.80 to 0.85).


Wu BU, Johannes RS, Sun X, Tabak Y, Conwell DL, Banks PA.

The early prediction of mortality in acute pancreatitis: a large population-based study.

Gut 2008, 57 (12): 1698-703

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