title: Validation of the clinical dehydration scale for children with acute gastroenteritis.
abstract: OBJECTIVE
  We previously created a clinical dehydration scale. Our objective was to validate the clinical dehydration scale with a new cohort of patients with acute gastroenteritis who were assessed in a tertiary emergency department in a developed country.
  
  
  METHODS
  A prospective observational study was performed in an emergency department at a large pediatric tertiary center in Canada. Children 1 month to 5 years of age with symptoms of acute gastroenteritis who were assessed in the emergency department were enrolled consecutively during a 4-month period. The main outcome measures were length of stay, proportion of children receiving intravenous fluid rehydration, and proportions of children with abnormal serum pH values or bicarbonate levels.
  
  
  RESULTS
  A total of 205 children were enrolled, with a mean age of 22.4 +/- 14.9 months; 103 (50%) were male. The distribution of severity categories was as follows: no dehydration (score of 0), n = 117 (57%); some dehydration (score of 1-4), n = 83 (41%); moderate/severe dehydration (score of 5-8), n = 5 (2%). The 3 dehydration categories were significantly different with respect to the validation hypotheses (length of stay, mean +/- SD: none, 245 +/- 181 minutes; some, 397 +/- 302 minutes; moderate/severe, 501 +/- 389 minutes; treatment with intravenous fluids: none, n =17, 15%; some, n = 41, 49%; moderate/severe, n = 4, 80%; number of vomiting episodes in the 7 days before the emergency department visit: none, 8.4 +/- 7.7 episodes; some, 13 +/- 10.7 episodes; moderate/severe, 30.2 +/- 14.8 episodes).
  
  
  CONCLUSIONS
  The clinical dehydration scale and the 3 severity categories were valid for a prospectively enrolled cohort of patients who were assessed in our tertiary emergency department. The scoring system was valuable in predicting a longer length of stay and the need for intravenous fluid rehydration for children with symptoms of acute gastroenteritis.
authors.affiliation: Division of Pediatric Emergency Medicine, BC Children's Hospital, 4480 Oak St, Vancouver, BC V6H 3V4, Canada. rgoldman@cw.bc.ca
authors.forename: Ran D
authors.initials: RD
authors.lastname: Goldman
authors.forename: Jeremy N
authors.initials: JN
authors.lastname: Friedman
authors.forename: Patricia C
authors.initials: PC
authors.lastname: Parkin