title: Predictors of repeated emergency department visits among persons treated for addiction.
abstract: OBJECTIVE
  To determine whether frequent emergency department (ED) users who enter specialized treatment programs for alcohol and/or drug problems have any characteristics that predict their future ED use.
  
  
  METHODS
  Adult patients (783 alcohol users, 405 illicit drug users) were interviewed. Data from the medical database on utilization of ED and the emergency departments' specific units for addictive diseases (EDAD) 12 months before and 12 months after the interview were linked with patient characteristics in logistic regression models.
  
  
  RESULTS
  Among alcohol users, prior ED/EDAD visits predicted repeat future visits to these sites (OR 11.6; 95% CI 6.5-20.5). Prior inpatient hospital care with addiction diagnosis was a predictor of future multiple visits to the EDAD only (OR 3.1; 95% CI 1.5-6.5). Among drug users, predictors of future ED/EDAD visits were use of heroin (OR 2.7; 95% CI 1.4-5.4) and prior ED/EDAD visits (OR 27.3; 95% CI 12.7-58.4). Drug users' EDAD utilization was also predicted by inpatient hospital care with addiction diagnosis.
  
  
  CONCLUSIONS
  The strongest predictive factors of visiting ED repeatedly were previous repeat emergency care use and hospitalization with addiction diagnosis. Entering regular addiction treatment does not appear to alter the pattern of ED utilization.
authors.affiliation: Stockholm Addiction Centre, Karolinska Institutet, Stockholm, Sweden.
authors.forename: Helen
authors.initials: H
authors.lastname: Hansagi
authors.forename: Barbro
authors.initials: B
authors.lastname: Engdahl
authors.forename: Anders
authors.initials: A
authors.lastname: Romelsjö
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D000437:Alcoholism / Q000628:therapy; D015331:Cohort Studies; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D012307:Risk Factors; D012737:Sex Factors; D016320:Substance Abuse Treatment Centers / Q000706:statistics & numerical data; D019966:Substance-Related Disorders / Q000628:therapy*; D013548:Sweden; D055815:Young Adult