title: A method for understanding admission decision making in a psychiatric emergency room.
abstract: OBJECTIVE
  To increase understanding of decisions about inpatient admission, a four-step algorithm was used to examine 2,073 consecutive visits to a public hospital psychiatric emergency room, 684 of which resulted in admission.
  
  
  METHODS
  Admission decision outcomes and patient data were cross-tabulated to identify conditions, or rules, under which outcome was almost certain. Discriminant function models were then made of individual clinicians' decision-making process and of individual diagnostic groups. To understand cases not covered in previous steps, a third discriminant function model was constructed.
  
  
  RESULTS
  The four-step method successfully predicted outcomes in 85 percent of cases at a minimum of an 80 percent confidence level. The variables of psychosis and violence combined into the most powerful predictor of admission. Twelve rules that applied to 41.4 percent of all cases were found. Eleven models of individual clinicians' decision policies applied to slightly more half of all cases and successfully classified about 95 percent of them. Eleven models of diagnostic groups applied to 93.2 percent of all cases and correctly predicted about 75 percent. The final discriminant model for the 171 cases not covered by the by the first three steps correctly classified about 90 percent of residual cass.
  
  
  CONCLUSIONS
  Psychiatric admission decisions are influenced by multiple variables that should be studied by examining general admission criteria and differences between clinicians.
authors.affiliation: School of Social Work, Bar Ilan University, Ramat Gan, Israel.
authors.forename: J
authors.initials: J
authors.lastname: Rabinowitz
authors.forename: M
authors.initials: M
authors.lastname: Slyuzberg
authors.forename: I
authors.initials: I
authors.lastname: Salamon
authors.forename: S
authors.initials: S
authors.lastname: Dupler
authors.forename: R S
authors.initials: RS
authors.lastname: Kennedy
authors.forename: R
authors.initials: R
authors.lastname: Steinmuller
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000465:Algorithms; D002648:Child; D016001:Confidence Intervals; D004637:Emergency Services, Psychiatric; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis* / Q000628:therapy; D008875:Middle Aged; D009519:New York City; D010343:Patient Admission; D011569:Psychiatric Status Rating Scales; D011618:Psychotic Disorders / Q000175:diagnosis / Q000628:therapy; D014754:Violence / Q000517:prevention & control / Q000523:psychology