Early Predictors of ADHD: Evidence from a Prospective Birth Cohort

Area of Science:

• Child Psychology
• Neurodevelopmental Disorders
• Epidemiology

Background:

• Attention-Deficit/Hyperactivity Disorder (ADHD) is a prevalent neurodevelopmental disorder with potential long-term consequences.
• Early identification of ADHD is crucial for timely intervention and improved outcomes.
• Understanding preschool predictors can aid in early detection and diagnosis.

Purpose of the Study:

• To identify predictors of registered ADHD diagnoses in preschool-aged children.
• To compare the predictive utility of two common ADHD rating scales: Child Behavior Checklist (CBCL) and Conners' Parent Rating Scale (CPRS-R:S).

Main Methods:

• Prospective, population-based cohort study (Norwegian Mother and Child Cohort Study).
• Inclusion of singleton children with maternal questionnaire data at ages 3 and 5 years.
• Utilized Cox proportional hazard regression analyses to assess predictors of ADHD diagnoses from the Norwegian Patient Register.

Main Results:

• ADHD symptoms reported at age 3 years significantly predicted later ADHD diagnosis (CBCL: HR = 3.23).
• ADHD symptoms reported at age 5 years showed even stronger prediction (CBCL: HR = 10.30; CPRS-R:S: HR = 5.92).
• Both CBCL and CPRS-R:S demonstrated utility in predicting ADHD diagnoses.

Conclusions:

• Early parent-reported ADHD symptoms are critical indicators for potential later diagnosis.
• The findings support the importance of taking preschool-reported symptoms seriously for early intervention.
• Both evaluated rating scales are valuable tools for predicting ADHD in young children.