Establishing the cut-off point for the Oppositional Defiant Behavior Inventory

Area of Science:

• Child and Adolescent Psychiatry
• Behavioral Psychology
• Developmental Psychology

Background:

• Oppositional Defiant Disorder (ODD) is a common behavioral disorder in children.
• Accurate diagnostic tools are crucial for effective intervention.
• The Oppositional Defiant Behavior Inventory (ODBI) is used to assess ODD symptoms.

Purpose of the Study:

• To determine a precise cut-off score for the Oppositional Defiant Behavior Inventory (ODBI).
• To validate the ODBI's effectiveness in diagnosing oppositional defiant disorder (ODD) in boys.
• To establish a reliable diagnostic threshold for ODD in pediatric populations.

Main Methods:

• The study involved 56 untreated boys diagnosed with ODD (ages 6-15) and 690 control boys without behavioral disorders.
• Statistical analysis, including one-way ANOVA, was used to evaluate ODBI scores across age groups.
• Sensitivity, specificity, and predictive values were calculated to establish the optimal cut-off point.

Main Results:

• The ODBI effectively evaluated opposition levels in boys across different age groups, showing no significant age-related score differences.
• A cut-off score of 20 on the ODBI demonstrated high diagnostic accuracy.
• The established cut-off yielded a sensitivity of 88.2%, specificity of 90.0%, positive predictive value of 75.0%, and negative predictive value of 95.7%.

Conclusions:

• A score of 20 on the ODBI is a suitable and validated cut-off point for diagnosing oppositional defiant disorder in boys.
• This finding supports the ODBI's utility as a reliable screening and diagnostic instrument for ODD.
• The established cut-off facilitates accurate differentiation between children with and without ODD.