Aim 1a. Ascertainment of 3,000 ARFID cases
ARFID, comorbid psychiatric
COURSE OF ILLNESS
We will conduct descriptive analyses to characterize the sample stratified by pediatric and adult cases. We will report demographics, symptom patterns, onset, course of illness, comorbid psychiatric conditions, neurodevelopmental characteristics, environmental exposures, and health-related quality of life in child (parent/guardian and child report) and adult ARFID cases.