EUCTR2008‐004425‐42‐NL.

Study name	Public title: not reported Scientific title: Neurocognitive testing in children with ADHD
Methods	Randomised controlled, double blind cross‐over trial Study duration: 3 months
Participants	Sample size (target): 20 Inclusion criteria Written informed consent from parents having parental responsibility or from the legal guardian (in the case of a child aged 12 years, the written informed consent of the child is needed in addition to that of parents having responsibility/legal guardian) Aged 8‐12 years Able to communicate with the investigator in Dutch Confirmed DSM‐IV diagnosis of ADHD (based on examination by a psychiatrist or paediatrician) Classifying as clinical ADHD on the “ADHD Vragenlijst” Currently receiving treatment with IR‐MPH or ER‐MPH Exclusion criteria Use of drugs other than MPH with known psychotropic effects
Interventions	MPH Placebo
Outcomes	ADHD symptoms “ADHD Vragenlijst” Non‐serious AEs Cardiovascular parameters (blood pressure and heart rate) Timing of outcome assessments not reported
Starting date	15 September 2008 (date of registration). Start date not reported
Contact information	Not reported
Notes	Sponsor: Centre for Human Drug Research Decleration of interests: not reported