Stratification of Children with Headaches into Near-zero, Intermediate and High-Risk (HEADACHE)

This is a prospective observational cohort study of children ages 2 to 17 years old presenting to emergency departments with a headache. The primary aim of the study is to derive and internally validate a risk stratification model that identifies the specific risk of emergent intracranial abnormalities in these children based on clinically sensible and reliable variables. We will also determine whether the prevalence of emergent intracranial abnormalities and association between risk factors and emergent intracranial abnormalities differ based on age.