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INCLEN diagnostic tool for attention deficit hyperactivity disorder (INDT-ADHD): development and validation
Sharmila Mukherjee1, Satinder Aneja, Paul S S Russell
1The INCLEN Trust International, New Delhi, India. Correspondence to: Dr Narendra K Arora, Executive Director, The INCLEN Trust International, F1/5, Okhla Industrial Area, Phase-1, New Delhi, India. nkarora@inclentrust.org.
Objective:
To develop and validate INCLEN Diagnostic Tool for Attention Deficit Hyperactivity Disorder (INDT-ADHD).
Design:
Diagnostic test evaluation by cross sectional design.
Setting:
Tertiary care pediatric centers.
Participants:
156 children aged 65-117 months.
Methods:
After randomization, INDT-ADHD and Connors 3 Parent Rating Scale (C3PS) were administered, followed by an expert evaluation by DSM-IV-TR diagnostic criteria.
Main Outcome Measures:
Psychometric evaluation of diagnostic accuracy, validity (construct, criterion and convergent) and internal consistency.
Results:
INDT-ADHD had 18 items that quantified symptoms and impairment. Attention deficit hyperactivity disorder was identified in 57, 87 and 116 children by expert evaluation, INDT-ADHD and C3PS, respectively. Psychometric parameters of INDT-ADHD for differentiating attention deficit hyperactivity disorder and normal children were: sensitivity 87.7%, specificity 97.2%, positive predictive value 98.0% and negative predictive value 83.3%, whereas for differentiating from other neuro-developmental disorders were 87.7%, 42.9%, 58.1% and 79.4%, respectively. Internal consistency was 0.91. INDT-ADHD has a 4-factor structure explaining 60.4% of the variance. Convergent validity with Conner's Parents Rating Scale was moderate (r =0.73, P= 0.001).
Conclusions:
INDT-ADHD is suitable for diagnosing attention deficit hyperactivity disorder in Indian children between the ages of 6 to 9 years.
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