In patients with acute pancreatitis, what is the recommended BISAP score cutoff for predicting severe disease and in‑hospital mortality, and how does its predictive accuracy compare with other early severity scores such as APACHE II? | Rounds In patients with acute pancreatitis, what is the recommended BISAP score cutoff for predicting severe disease and in‑hospital mortality, and how does its predictive accuracy compare with other early severity scores such as APACHE II? | Rounds
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In patients with acute pancreatitis, what is the recommended BISAP score cutoff for predicting severe disease and in‑hospital mortality, and how does its predictive accuracy compare with other early severity scores such as APACHE II?

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Last updated: July 24, 2026 · View editorial policy

BISAP Score Cutoff for Severe Acute Pancreatitis and In‑Hospital Mortality

A BISAP score cutoff of ≥3 is supported as a statistically significant early threshold for predicting severe acute pancreatitis and death. [1]

In a prospective observational cohort (n=60), BISAP ≥3 served as the identified cutoff associated with severe acute pancreatitis. [1]

In the same prospective observational cohort, BISAP ≥3 was also reported as the statistically significant cutoff for prediction of mortality. [1]

Predictive Accuracy Versus APACHE II for Severe Disease

In the prospective observational cohort, the diagnostic/prognostic discrimination (AUC) for severe acute pancreatitis was reported as:

  • BISAP: 0.875
  • APACHE II: 0.891 [1]

Predictive Accuracy Versus APACHE II for In‑Hospital Mortality

In the prospective observational cohort, the discrimination (AUC) for death was reported as:

  • BISAP: 0.740
  • APACHE II: 0.769 [1]

Cross‑Study Support for Mortality Discrimination Using BISAP

An additional retrospective evaluation of consecutive acute pancreatitis admissions reported high discrimination for mortality with BISAP, with BISAP mortality AUC = 0.940 (definition of severe disease differed across studies). [2]

Practical Interpretation of the BISAP ≥3 Threshold Relative to APACHE II

Across published early-evaluation cohorts, BISAP ≥3 is associated with meaningful risk stratification for severe disease. [1]

Across the same cohort, APACHE II demonstrated slightly higher AUC for mortality than BISAP, while AUCs for severe disease were very close. [1]

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