European ADHD Study

One of the largest studies every conducted about the effects of ADHD on children and their parents in 9 European countries.

We conducted 5-10 elicitation interviews per country with adolescents and their parents to help develop the quant questionnaire.

We then linguistically validated the questionnaire with patients in each country.

Finally, we recruited and surveyed over 4,000 respondents for the quant survey using a multi-source recruitment  strategy by combining a number of different online patient panels in each country.