Evaluation of diagnostic criteria and incidence of acute mountain sickness in preverbal children.

Objective: The Children's Lake Louise Score (CLLS) established the diagnostic criteria for acute mountain sickness (AMS) in preverbal children. Prospective application of the CLLS and interobserver agreement for the score had not been evaluated in a controlled trial. A study of children and their parents was used to evaluate the CLLS and determine the incidence of AMS in preverbal children.