Table 2.

Prognostic Characteristics According to Acute Pancreatitis with Identified versus Unknown Etiology.

Characteristic Total (n=560) Identified Etiology (n=359) Idiopathic (n=201) P Value
Short-term Outcomes

Admitted to ICU, n (%) 12 (2.1) 9 (2.5) 3 (1.5) 0.426

Length of hospital stay, days, median (range) 4.0 (2.0–6.0) 4.0 (3.0–6.0) 3.0 (2.0–5.0) <0.001

Any complication, n (%), of which: 20 (3.6) 14 (3.9) 6 (3.0) 0.643
 Necrotizing, n (%) 15 (2.7) 10 (2.8) 5 (2.5) 0.740
 Pseudocyst, n (%) 5 (0.9) 4 (1.1) 1 (0.5)

Surgery due to complication, n (%) 1 (0.5) 3 (0.8) 0 (0.0) 0.194

30-day re-admission due to pancreatitis, n (%) 54 (9.6) 49 (13.6) 5 (2.5) <0.001

30-day re-admission due to any cause, n (%) 91 (16.3) 76 (21.2) 15 (7.5) <0.001

30-day ERCP/MRCP tests, n (%) 29 (5.2) 26 (7.2) 3 (1.5) 0.002

30-day mortality, n (%) 16 (2.9) 11 (3.1) 5 (2.5) 0.769

Composite outcome, n (%)* 86 (15.4) 70 (19.5) 16 (8.0) <0.001

Long-term Outcomes

365-day mortality, n (%) 40 (7.1) 25 (7.0) 15 (7.5) 0.865

365-day re-admission due to pancreatitis, n (%) 112 (20.0) 92 (25.6) 20 (10.0) <0.001

365-day re-admission due to any cause, n (%) 224 (40.0) 167 (46.5) 57 (28.4) <0.001

365-day ERCP/MRCP tests, n (%) 78 (13.9) 52 (14.5) 26 (12.9) 0.703

Gastro outpatient clinic follow-up, n (%) 147 (26.3) 80 (22.3) 67 (33.3) 0.005
*Composite outcome composed of 30-day mortality, ICU admission, any complication, surgery due to complication, and 30-days re-admission due to pancreatitis.

ERCP, endoscopic retrograde cholangiopancreatography; ICU, intensive care unit; MRCP, magnetic resonance cholangiopancreatography.

RMMJ Rambam Maimonides Medical Journal Rambam Health Care Campus 2021 July; 12(3): e0019. ISSN: 2076-9172
Published online 2021 July 20. doi: 10.5041/RMMJ.10442.