title: Comparison of Tzanakis score vs Alvarado score in the effective diagnosis of acute appendicitis.
abstract: BACKGROUND
  Acute appendicitis is the most frequent surgical emergency encountered worldwide. This study was conducted to compare the efficacy of Tzanakis score and Alvarado score in diagnosing acute appendicitis.
  
  
  OBJECTIVE
  The aim of this study is to compare the efficacy of Tzanakis scoring system with Alvarado scoring system in diagnosing AA.
  
  
  METHODS
  This was a retrospective and nonrandomized observational study conducted in Dhulikhel hospital. It included 200 clinically diagnosed cases of acute appendicitis who underwent emergency open or laparoscopic appendectomy during the year 2012. Final diagnosis of acute appendicitis was based on histological findings given by pathologist.
  
  
  RESULTS
  The sensitivity, specificity, positive predictive value and negative predictive value of Tzanakis score was 86.9%, 75.0, 97.5% and 33.3% respectively. The sensitivity, specificity, positive predictive value and negative predictive value of Alvarado score was 76.0%, 75.0%, 97.2% and 21.4% respectively. Negative appendectomy was 8.0%.
  
  
  CONCLUSIONS
  Tzanakis scoring system is an effective scoring system in diagnosing acute appendicitis.
authors.affiliation: Department of Surgery, Dhulikhel Hospital- Kathmandu University Hospital, Kathmandu University School of medical Science, Dhulikhel, Kavre, Nepal.
authors.forename: B R
authors.initials: BR
authors.lastname: Malla
authors.affiliation: Department of Surgery, Dhulikhel Hospital- Kathmandu University Hospital, Kathmandu University School of medical Science, Dhulikhel, Kavre, Nepal.
authors.forename: H
authors.initials: H
authors.lastname: Batajoo
mesh_terms: D000208:Acute Disease; D001064:Appendicitis / Q000175:diagnosis*; D006801:Humans; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index