Data collection and management
Confidentiality is maintained throughout the current study. The handling of subjects’ personal data is in accordance with the European General Data Protection Regulation (in Dutch: Algemene Verordening Gegevensbescherming, AVG). To maintain anonymity of all data, participants will only be identifiable by a unique code assigned on the data of their inclusion. The code list will be digitally stored on the secured drive of Karakter, which is password protected, and is only accessible to researchers involved in the project. Non-anonymous data (e.g. informed consent documents), will be digitalized and stored in password-secured folders that provide restricted access. All local databases will be secured with password-protected access systems. The online electronic data capture software CASTOR EDC will be used to collect and store questionnaire data. Data collected during an assessment at the location, such as physical measurements, actigraph data, and outcomes of the WISC-V intelligence test, will also be entered and stored in CASTOR EDC. All paper documents are stored in a locker at Karakter Child and Adolescent Psychiatry. Access to this storage is accessible to only a select few researchers.Parents will be reminded via e-mail (twice) and then via telephone by the researchers to reduce the chance of missing data. During the intake, researchers will explicitly mention 1-year participation to prevent drop-out at the long-term assessments (after 6 and 12 months). After completing these long-term data, families will also receive a small gift to make it more attractive to complete all four assessments. Parents can declare their travel expenses up to 20 euros. Children will receive a small gift after T0, T1, T2, and T3. Participants may withdraw from the study for any reason at any time.