2 results match your criteria: "Childrens' Memorial Hospital and Northwestern University Medical School[Affiliation]"

Objective: To examine the stability and change in oppositional defiant disorder (ODD) with onset among preschool children in a pediatric sample.

Method: A total of 510 children aged 2-5 years were enrolled initially in 1989-1990 (mean age 3.42 years); 280 participated in five waves of data collection over a period of 48 to 72 months (mean wave 5 age, 8.

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