title: Adverse patient occurrences in otorhinolaryngology: results of a systematic registry in a tertiary referral hospital.
abstract: OBJECTIVE
  To identify patient groups at risk for Adverse Patient Occurrences (APOs) to improve the quality of care.
  
  
  METHODS
  This study was conducted using retrospective analysis.
  
  
  METHODS
  APOs have been systematically registered from 1997 to 2006 in all patients (6,932) admitted to the otorhinolaryngology-head and neck surgery department of the University Hospital Maastricht, the Netherlands. Several characteristics such as length of stay, age, gender, season, and diagnosis were related to the incidence and type of APOs.
  
  
  RESULTS
  Increasing age and length of stay are related to an increasing incidence of APOs. Children are found to be at high risk too and outpatient treatment (<24 h) is a risk factor for APOs. Of all APOs, 67% were organizational and 33% medical. The three diagnosis-related groups (DRGs), in which APOs occurred most, were the inner ear/cerebellopontine angle (CPA), esophagus, and head and neck oncology group. No seasonal influences on APO occurrences existed.
  
  
  CONCLUSIONS
  Male and female patients >60 or <10 years old are at the highest risk for APOs. Their risk increases with their length of stay and is high when admitted less than 24 hours. When patients are among the three most prevalent DRGs, their risk is even higher.
authors.affiliation: Department of Otolaryngology/Head and Neck Surgery, University Hospital Maastricht, the Netherlands.
authors.forename: Ruth
authors.initials: R
authors.lastname: Hoffmans
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Stokroos
authors.forename: Mircea
authors.initials: M
authors.lastname: Rikers
authors.forename: Herman
authors.initials: H
authors.lastname: Kingma
authors.forename: Bernd
authors.initials: B
authors.lastname: Kremer
mesh_terms: D005260:Female; D006761:Hospitals; D006801:Humans; D008297:Male; D008875:Middle Aged; D010036:Otolaryngology / Q000706:statistics & numerical data*; D013517:Otorhinolaryngologic Surgical Procedures / Q000706:statistics & numerical data*; D011183:Postoperative Complications / Q000453:epidemiology*; D015995:Prevalence; D012017:Referral and Consultation / Q000706:statistics & numerical data*; D012042:Registries; D012189:Retrospective Studies; D012307:Risk Factors