title: Case mix, outcome, and activity for admissions to UK critical care units with severe acute pancreatitis: a secondary analysis of the ICNARC Case Mix Programme Database.
abstract: BACKGROUND
  Severe acute pancreatitis (SAP) requiring admission to a critical care unit is associated with high mortality and long lengths of stay. We describe the case mix, outcome, and activity of admissions with SAP who were identified from a high-quality clinical database.
  
  
  METHODS
  We conducted a secondary analysis of the ICNARC (Intensive Care National Audit & Research Centre) Case Mix Programme Database of 219,468 admissions to 159 adult, general critical care units in England, Wales, and Northern Ireland for the period of 1995 to 2003 to identify admissions with SAP. The ability of the modified Glasgow criteria to discriminate hospital survivors from non-survivors was compared to that of the Acute Physiology and Chronic Health Evaluation (APACHE) II score and a number of individual physiological parameters.
  
  
  RESULTS
  A total of 2,677 admissions with SAP were identified (1.2% of all admissions). Mortality for these admissions was 31% in the critical care unit and 42% in hospital. The median length of stay in the critical care unit was 3.8 days and was similar for survivors and non-survivors. Increasing numbers of modified Glasgow criteria were associated with increasing hospital mortality, but better discrimination was provided by the APACHE II score and by several physiological parameters.
  
  
  CONCLUSIONS
  SAP requiring critical care is associated with high mortality and long length of stay. The modified Glasgow criteria represent a simple measure of severity but were not designed to predict hospital mortality. It may be possible to develop a specific model for risk prediction in patients with SAP requiring critical care.
authors.affiliation: Intensive Care National Audit & Research Centre (ICNARC), Tavistock House, Tavistock Square, London WC1H 9HR, UK. david.harrison@icnarc.org
authors.forename: David A
authors.initials: DA
authors.lastname: Harrison
authors.forename: Giovanna
authors.initials: G
authors.lastname: D'Amico
authors.forename: Mervyn
authors.initials: M
authors.lastname: Singer
mesh_terms: D000208:Acute Disease; D003422:Critical Care / Q000706:statistics & numerical data*; D003953:Diagnosis-Related Groups / Q000706:statistics & numerical data*; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D007902:Length of Stay / Q000706:statistics & numerical data; D008297:Male; D008499:Medical Records / Q000706:statistics & numerical data; D016017:Odds Ratio; D017063:Outcome Assessment, Health Care; D010195:Pancreatitis / Q000401:mortality* / Q000628:therapy; D010343:Patient Admission / Q000706:statistics & numerical data; D012044:Regression Analysis; D012189:Retrospective Studies; D015996:Survival Rate; D006113:United Kingdom / Q000453:epidemiology