Please use this identifier to cite or link to this item: http://repositorio.unifesp.br/handle/11600/32832
Title: ADHD in a representative sample of the Brazilian population: estimated prevalence and comparative adequacy of criteria between adolescents and adults according to the item response theory
Authors: Polanczyk, Guilherme
Laranjeira, Ronaldo [UNIFESP]
Zaleski, Marcos [UNIFESP]
Pinsky, Ilana [UNIFESP]
Caetano, Raul
Rohde, Luis Augusto
Univ Fed Rio Grande do Sul
Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Universidade Federal de Santa Catarina (UFSC)
Univ Texas Houston
Keywords: attention-deficit/hyperactivity disorder
WHO ASRS screener
adult
prevalence
epidemiology
Issue Date: 1-Sep-2010
Publisher: Wiley-Blackwell
Citation: International Journal of Methods in Psychiatric Research. Chichester: John Wiley & Sons Ltd, v. 19, n. 3, p. 177-184, 2010.
Abstract: Background: Attention deficit hyperactivity disorder (ADHD) is a clinically significant disorder in adulthood, but current diagnostic criteria and instruments do not seem to adequately capture the complexity of the disorder in this developmental phase. Accordingly, there are limited data on the proportion of adults affected by the disorder, specially in developing countries.Method: We assessed a representative household sample of the Brazilian population for ADHD with the Adult ADHD Self-report Scale (ASRS) Screener, and evaluated the instrument according to the Rasch model of item response theory.Results: the sample was comprised by 3007 individuals, and the overal prevalence of positive screeners for ADHD was 5.8% [95% confidence interval (CI), 4.8-7.0]. Rasch analyses revealed the misfitt of the overall sample to expectations of the model. the evaluation of the sample stratified by age revealed that data for adolescents showed a signficant fittnes to the model expectations, while items completed by adults were not adequated.Conclusions: the lack of fitness to the model for adult respondents challenges the possibility of a linear transformation of the ordinal data into interval measures and the utilization of parametric analyses of data. This result suggests that diagnostic criteria and instruments for adult ADHD must take into account a developmental perspective. Moreover, it calls for further evaluation of currently employed research methods in light of modern theories of psychometrics. Copyright (C) 2010 John Wiley & Sons, Ltd.
URI: http://repositorio.unifesp.br/handle/11600/32832
ISSN: 1049-8931
Other Identifiers: http://dx.doi.org/10.1002/mpr.319
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