a1 Institut für Humangenetik der Universität, Göttingen, Germany; the Department of Psychiatry and Behavioural Sciences, Johns Hopkins University, Baltimore, USA: and the Community and Social Psychiatry Department, University of Texas Medical Branch, Galveston, USA
Eleven behaviourally abnormal XYY males who had been treated in a structured combined programme of antiandrogen medication and counselling were followed up 1 year after cessation of the programme. Behavioural ratings were made in each of 5 categories: assault against people, destructiveness against things, threatening behaviour, stealing, and self-harming. On examining the follow-up findings, therapeutic success appeared questionable.
c1 Address for correspondence: Dr Claus Wiedeking, Neurologische Klinik der Universität, Robert-Koch-Str. 40, 3400 Göttingen, West Germany.