Validity of a reduced model of items of DSM-IV criteria according to the parents’ and teachers’ responses in the diagnostic of the attention deficit hyperactivity disorder (combined type)
Main Objective: To look for a reduced model of symptoms of the attention deficit hyperactivity disorder combined type (ADHD-C), that shows suitable levels of criterion validity for the diagnostic of the disease.
Methods: Epidemiological study. Sample of 1095 children between 6 and 16 years. First stage: psicometric study using ADHD RS-IV answered by parents (P) and teachers (T). ADHD is suspected when both questionnaires are over 90th percentile. Second stage: Clinical interview DISC-IV (DSM-IV) only in those selected cases to confirm ADHD-C. Logistic regression is implemented to find the most parsimonious model to predict ADHD-C.
Results: The model that predicts clinical ADHD-C consists of 8 of the 36 items of the ADHD RS-IV answered by P and T. If we consider the Odds Ratio obtained by regression, the items present a ranking of: 15 T> 1 P> 16 T> 12 P> 17 P> 10 P> 14 P> 4 T. The model has criterion validity for symptomatic ADHD-C (sensitivity: 97.9%. Specificity: 93.8%. Likelihood ratio: 16.02).Conclusions: It is possible to reduce the list of symptoms of ADHD-C with good criterion validity, removing redundant items and keeping those that provide greater discrimination between ADHD-C and the general population.
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