title: Hemoconcentration as an early risk factor for necrotizing pancreatitis.
abstract: OBJECTIVE
  The aim of our study was to determine whether measurement of serum hematocrit during the first 24 h helps in distinguishing necrotizing from mild pancreatitis.
  
  
  METHODS
  From May 1992 to June 1996, a case-control study was performed with cases of patients with necrotizing pancreatitis. We selected as a control the next patient admitted with mild pancreatitis.
  
  
  RESULTS
  There were 32 patients in each group. Logistic regression identified an admission hematocrit of > or = 47% and a failure of admission hematocrit to decrease at 24 h as the best binary risk factors for necrotizing pancreatitis. At admission, more patients with necrotizing pancreatitis than with mild pancreatitis had a hematocrit > or = 47% (11/32 vs 3/32; p = 0.03). At 24 h, 15 additional patients with necrotizing pancreatitis versus only one with mild pancreatitis showed no decrease in admission hematocrit (p < 0.01). Thus, by 24 h, 26 of 32 patients with necrotizing pancreatitis versus only four of 32 patients with mild pancreatitis met one or the other criterion (p < 0.01). The sensitivity and specificity at admission were 34% and 91%; at 24 h, 81% and 88%.
  
  
  CONCLUSIONS
  Hemoconcentration with an admission hematocrit > or = 47% or failure of admission hematocrit to decrease at approximately 24 h were strong risk factors for the development of pancreatic necrosis.
authors.affiliation: Center for Pancreatic Disease, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Baillargeon
authors.forename: J
authors.initials: J
authors.lastname: Orav
authors.forename: V
authors.initials: V
authors.lastname: Ramagopal
authors.forename: S M
authors.initials: SM
authors.lastname: Tenner
authors.forename: P A
authors.initials: PA
authors.lastname: Banks
mesh_terms: D018806:APACHE; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D005260:Female; D006400:Hematocrit; D006801:Humans; D008297:Male; D008875:Middle Aged; D009336:Necrosis; D010195:Pancreatitis / Q000097:blood* / Q000209:etiology; D012044:Regression Analysis; D012307:Risk Factors; D012680:Sensitivity and Specificity