Status: Finalised First registered on: 28/04/2017
Last updated on: 07/07/2021
1. Study identification
EU PAS Register NumberEUPAS18732
Official titleThe relationship between the month of birth and ADHD treatment
Study title acronym
Study typeObservational study
Brief description of the study****This study has been cancelled before data collection due to lack of time by the researchers**** There seems to be a relationship between a child’s month of birth and the diagnosis and treatment of attention deficit hyperactivity disorder (ADHD). Both underdiagnosis as well as overdiagnosis of ADHD can have consequences for the future of a child. The objective of this study is to determine if there is a relationship between the month of birth and the pharmacological treatment of ADHD in children in the Netherlands. The study cohort includes children and adolescents ≤ 24 years old who use ADHD medication, dispensed for the first time between 2006-2016.
Was this study requested by a regulator?No
Is the study required by a Risk Management Plan (RMP)? Not applicable
Regulatory procedure number (RMP Category 1 and 2 studies only)
Other study registration identification numbers and URLs as applicable
2. Research centres and Investigator details
Coordinating study entity
Centre to which the investigator belongsUtrecht University Pharmacoepidemiology Center
Department/Research groupDivision of Pharmacoepidemiology & Clinical Pharmacology
Organisation/affiliationUtrecht Institute for Pharmaceutical Sciences
Website/Homepagewww.uu.nl/pecp
Details of (Primary) lead investigator
Title Dr
Last name Heerdink
First name Rob
Is this study being carried out with the collaboration of a research network?
No
Other centres where this study is being conducted
Not applicable (single centre)

Countries in which this study is being conducted
National study

Netherlands
3. Study timelines: initial administrative steps, progress reports and final report
PlannedActual
Date when funding contract was signed01/02/201701/02/2017
Start date of data collection01/06/201701/06/2017
Start date of data analysis
Date of interim report, if expected
Date of final study report01/01/201807/07/2021
4. Sources of funding
Please provide estimates of the percentage of funding by source for this study
Names(s)Approximate % funding
Pharmaceutical companies
Charities
Government body
Research councils
EU funding scheme
OtherDivision of Pharmacoepidemiology & Clinical Pharmacology100
5. Contact details for enquiries
Scientific Enquiries
Title Dr
Last name Heerdink
First name Rob
Address line 1Universiteitsweg 99
Address line 2PO Box 80082 
Address line 3 
CityUtrecht 
Postcode3508 TB 
CountryNetherlands
Phone number (incl. country code)31-6-20283616 
Alternative phone number 
Fax number (incl. country code) 
Email address E.R.Heerdink@uu.nl
Public Enquiries
Title Dr 
Last name Heerdink 
First name Rob 
Address line 1Universiteitsweg 99 
Address line 2PO Box 80082 
Address line 3 
CityUtrecht 
Postcode3508 TB 
CountryNetherlands 
Phone number (incl. country code)31-6-20283616 
Alternative phone number 
Fax number (incl. country code) 
Email address E.R.Heerdink@uu.nl 
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