title: Appropriateness of emergency department visits in a Portuguese university hospital.
abstract: OBJECTIVE
  There are no studies in Portugal supporting a common claim that most emergency department visits are inappropriate. The aim of this study was to determine the prevalence of and to evaluate factors associated with an appropriate ED visit in a major public hospital.
  
  
  METHODS
  A cross-sectional prospective study was performed at a public university hospital ED. Data for demographic variables, duration of complaint, transfer from other medical sources, and previous medical care for the same complaints were collected by interviewing all patients who arrived at the ED within a consecutive period of at least 24 hours. Data for diagnostic tests, treatment performed, and final patient destination were collected by triage records review. An appropriate ED visit was defined by explicit criteria: interhospital transfer, patient death at the ED, hospitalization, and diagnostic tests or treatments performed.
  
  
  RESULTS
  The study included 5,818 adult patients. The prevalence of an appropriate ED visit, by use of our criteria, was 68.7%. Sex was an effect modifier. According to this study, determinants of an appropriate visit for men and women were age 60 years or older and complaints of 24 hours or less and in women but not in men, retired from work and with arrival between midnight and 8 AM.
  
  
  CONCLUSIONS
  In a university hospital in Oporto, the majority of ED visits were appropriate according to explicit criteria. Some variables may be associated with appropriateness of ED visits. A duration of the complaint 24 hours or less along with an arrival between midnight and 8 AM in women and age 60 years or older in men were the most important determinants.
authors.affiliation: Serviço de Medicina 2, Hospital de São João, Porto, Portugal.
authors.forename: S
authors.initials: S
authors.lastname: Pereira
authors.forename: A
authors.initials: A
authors.lastname: Oliveira e Silva
authors.forename: M
authors.initials: M
authors.lastname: Quintas
authors.forename: J
authors.initials: J
authors.lastname: Almeida
authors.forename: C
authors.initials: C
authors.lastname: Marujo
authors.forename: M
authors.initials: M
authors.lastname: Pizarro
authors.forename: V
authors.initials: V
authors.lastname: Angélico
authors.forename: L
authors.initials: L
authors.lastname: Fonseca
authors.forename: E
authors.initials: E
authors.lastname: Loureiro
authors.forename: S
authors.initials: S
authors.lastname: Barroso
authors.forename: A
authors.initials: A
authors.lastname: Machado
authors.forename: M
authors.initials: M
authors.lastname: Soares
authors.forename: A B
authors.initials: AB
authors.lastname: da Costa
authors.forename: A F
authors.initials: AF
authors.lastname: de Freitas
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000704:Analysis of Variance; D003430:Cross-Sectional Studies; D004522:Educational Status; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D004651:Employment / Q000706:statistics & numerical data; D005260:Female; D006300:Health Services Misuse / Q000706:statistics & numerical data*; D006302:Health Services Research; D006779:Hospitals, Public / Q000706:statistics & numerical data*; D006785:Hospitals, University / Q000706:statistics & numerical data*; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D010342:Patient Acceptance of Health Care / Q000523:psychology* / Q000706:statistics & numerical data*; D011174:Portugal / Q000453:epidemiology; D015995:Prevalence; D011446:Prospective Studies; D012307:Risk Factors; D012737:Sex Factors; D011795:Surveys and Questionnaires; D013997:Time Factors; D014600:Utilization Review