Factors Associated With the Diagnosis of Neurodevelopmental Disorders: A Population-Based Longitudinal Study

Abstract

Variation in the rate of newly diagnosed mental retardation, attention-deficit/hyperactivity disorder, and autism among children in Taiwan depended on age, birth year, period, and socioeconomic status. The extent of the association linking age with the first diagnosis of mental retardation varies across different urbanicity level and socioeconomic status.