Validity and reliability of the ASRS and WURS-25 scales for the diagnosis of attention deficit hyperactivity disorder in an Argentinian population
*Correspondencia: Dr. Mariano G. Scandar. Calle Tte. Gral. Perón 1730 Depto 138. Ciudad Autónoma de Buenos Aires, Argentina.
E-mail: mariano@fnc.org.ar
Introduction: Attention deficit hyperactivity disorder (ADHD) is a high-prevalence condition: an estimated 2-4% of adults have it. For its diagnosis it is important to know both the presence of symptoms in the present and during the childhood, for which self-administered tools are a valuable resource.
Objectives: Validate the ASRS and WURS25 scales (abbreviated version of the WenderUtah scale) in Argentine population, as well as provide norms for their application.
Subjects and methods: A general population sample of 1173 volunteers recruited from the internet was used, as well as a clinical sample of 80 patients with ADHD, both completed the scales and a sociodemographic questionnaire. Statistical studies were conducted to verify the internal validity and factorial consistency of the ASRS subscales (corresponding to inattention, hyperactivity and combined) and the two samples were compared to assess the external validity of the test.
Results: The data obtained showed statistical behavior like the original versions of the tests, adequate levels of internal consistency and clinical discrimination. There were no significant differences depending on the gender of the participants or by age in subjects aged 18 to 50 years. However, subjects over the age of 50 scored higher in the ASRS.
Conclusions: The ASRS and the WURS-25 meet the expected internal consistency and external validity criteria in the Argentine population.
Objetivos Validar las escalas Adult ADHD Self Report Scale (ASRS) y Wender-Utah (WURS)-25 (versión abreviada de la WURS) en población argentina, así como proporcionar normas para su aplicación.
Sujetos y métodos Se utilizó una muestra de población general de 1.173 voluntarios reclutados a través de internet, así como una muestra clínica de 80 pacientes con TDAH; todos completaron ambas escalas y un cuestionario sociodemográfico. Se realizaron estudios estadísticos para verificar la validez interna y la consistencia factorial de las subescalas de la ASRS (correspondientes a inatención, hiperactividad y total combinado), y se comparó la muestra de población general con la muestra clínica para conocer la validez externa de la prueba.
Resultados Los datos obtenidos mostraron un comportamiento estadístico similar a las versiones originales, adecuados niveles de consistencia interna y de discriminación clínica. No hubo diferencias significativas, según el género de los participantes ni por edad, en sujetos de 18 a 50 años. Sin embargo, los sujetos mayores de 50 años obtuvieron puntuaciones más altas en la ASRS.
Conclusiones La ASRS y la WURS-25 cumplen en población argentina con los criterios de consistencia interna y validez externa esperables.