title: The usefulness of the Mannheim Peritonitis Index score in assessing the condition of patients treated for peritonitis.
abstract: The aim of the study was to verify the Mannheim Peritonitis Index (MPI) suitability to determine the probability of death among patients in Polish population operated due to peritonitis and to assess the possibility of using the Index to determine the risk of postoperative complications, relaparotomy and need for postoperative hospitalization in intensive care unit.
  
  
  METHODS
  Retrospective analysis covered 168 patients (M: F = 83: 85, mean age = 48.45 years, SD ± 22.2) treated for peritonitis. The MPI score was calculated for each patient. According to MPI results, patients were divided to the appropriate groups (<21, 21-29, > 29) and within analyzed. The statistical analysis used Chi-square, Mann Withney U and Kolmogorov-Smirnov test. The best cut-off point for MPI was calculated on the basis of ROC analisys.
  
  
  RESULTS
  Mortality in the study group was 13.1%. In groups <21, 21-29 and > 29 points according to MPI mortality was 1.75%, 28.13% and 50% respectively, the difference was statistically significant (p = 0.0124). Significant differences were observed in mortality depending on the diagnosis. Based on the ROC curve the cut-off point was identified as 32 with an accuracy of 85.9% and AUC = 81%. There has been a significant correlation between the MPI count and and the occurrence of: cardio-respiratory failure, acidosis, electrolyte imbalance, surgical wound complications, the need for treatment in the intensive care unit after surgery.
  
  
  CONCLUSIONS
  The MPI is a simple and effective predictor of death among patients operated due to peritonitis. It can also provide assistance in assessing the risk of postoperative complications and the need for treatment in the intensive care unit.
authors.forename: Piotr
authors.initials: P
authors.lastname: Budzyński
authors.forename: Jadwiga
authors.initials: J
authors.lastname: Dworak
authors.forename: Michał
authors.initials: M
authors.lastname: Natkaniec
authors.forename: Michał
authors.initials: M
authors.lastname: Pędziwiatr
authors.forename: Piotr
authors.initials: P
authors.lastname: Major
authors.forename: Marcin
authors.initials: M
authors.lastname: Migaczewski
authors.forename: Maciej
authors.initials: M
authors.lastname: Matłok
authors.forename: Andrzej
authors.initials: A
authors.lastname: Budzyński
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D008875:Middle Aged; D010538:Peritonitis / Q000175:diagnosis* / Q000401:mortality* / Q000601:surgery; D011044:Poland; D011183:Postoperative Complications / Q000175:diagnosis*; D011237:Predictive Value of Tests; D011379:Prognosis; D012372:ROC Curve; D012189:Retrospective Studies; D018570:Risk Assessment / Q000379:methods*; D012720:Severity of Illness Index