The retrospective assessment of childhood attention deficit hyperactivity disorder in adults: Reliability and validity of the Italian version of the Wender Utah Rating Scale

To assess the reliability and validity of the Wender Utah Rating Scale (WUR S), 759 Italian undergraduate students were administered the Italian versio n of the WURS. In this sample, the WURS showed good internal consistency re liability (Cronbach alpha = .888), Both 1-week (r = .981, P < .001) and 2-m onth (r = .924, P < .001) retest reliabilities were satisfactory The mother /subject agreement on the WURS total score was large: intraclass r=.883. P < .001. The principal component (PC) analysis showed the presence of three positively correlated first-order PCs, and one second-order PC. This PC str ucture of the WURS was replicated in an independent sample of 300 consecuti vely admitted psychiatric inpatients and outpatients. Finally, in a sample of '132 secondary school students, the WURS showed a moderate correlation w ith the Conners Abbreviated Parent and Teacher Questionnaire (CAPTO): r = . 307, P < .001. In this sample, the WURS total score was negatively correlat ed with school performance (rho = -.460, P < .001) and conduct (rho = -.293 , P < .005) indexes. Copyright (C) 2001 by W.B. Saunders Company.