title: Emergency Department Visits for Gastroenteritis Before and After Rotavirus Vaccine Implementation in 2006.
abstract: OBJECTIVE
  Gastroenteritis (GE) accounts for a significant number of emergency department (ED) visits in children. Several studies since the introduction of a new rotavirus vaccine in 2006 have found decreases in rotavirus illness. We sought to determine in a large multicenter ED database whether there was also a decrease in ED visits in young children for GE.
  
  
  METHODS
  
  
  
  METHODS
  Retrospective cohort of ED visits.
  
  
  METHODS
  28 EDs with annual visits between 22,000 and 82,000.
  
  
  METHODS
  Consecutive patients between January 1, 1996, and December 31, 2011.
  
  
  METHODS
  We identified GE visits using International Classification of Diseases 9th revision (ICD-9) codes. For each year, less than 5 years, we determined the average daily percent of total ED visits for GE. We calculated the decreases from 2005 to 2011 in the average daily percent GE visits for each year of life and their 95% confidence intervals.
  
  
  RESULTS
  There were 7,740,823 total visits in the database, and 811,317 (10.5%) are younger than 5 years. The annual percent of GE visits rose for all years of life from 1999 to 2005 and then decreased from 2005 to 2011. The decreases from 2005 to 2011 were greatest in the earliest years of life ranging from 41% in the first year of life to 15% in the fifth year of life.
  
  
  CONCLUSIONS
  We found a decrease in average daily ED visits for GE in each year of life for those younger than 5 years after the introduction of the rotavirus vaccine. This was most pronounced during the earliest years of life.
authors.affiliation: From the Morristown Medical Center Residency in Emergency Medicine, Morristown, NJ.
authors.forename: Diane P
authors.initials: DP
authors.lastname: Calello
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Allegra
authors.forename: Dennis G
authors.initials: DG
authors.lastname: Cochrane
authors.forename: Barnet
authors.initials: B
authors.lastname: Eskin
authors.forename: John R
authors.initials: JR
authors.lastname: Allegra
mesh_terms: D002675:Child, Preschool; D015331:Cohort Studies; D016208:Databases, Factual; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D005759:Gastroenteritis / Q000453:epidemiology* / Q000821:virology; D006801:Humans; D007223:Infant; D009515:New Jersey / Q000453:epidemiology; D009518:New York / Q000453:epidemiology; D012189:Retrospective Studies; D012400:Rotavirus Infections / Q000453:epidemiology* / Q000517:prevention & control; D022243:Rotavirus Vaccines / Q000008:administration & dosage*; D016896:Treatment Outcome
chemical_list: D022243:Rotavirus Vaccines