Problem: Little is known about psychopathology in preschool-age children.
Methods: A review of representative studies of psychiatric disorders in preschoolers.
Findings: Sample sizes ranged from 104 to 3,860 subjects, ages 1 to 9 years. Prevalence rates of psychiatric disorders varied from 0.1% to 26.4%; high rates of co-morbidity were reported.
Conclusions: Studies addressing psychiatric disorders in preschoolers are extremely limited. Future research is needed to improve the diagnosis, treatment, and outcomes in preschool-age children.