Author Contributions: Dr Bax had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Bax, Flodmark.
Acquisition of data: Bax, Tydeman, Flodmark.
Analysis and interpretation of data: Bax, Tydeman, Flodmark.
Drafting of the manuscript: Bax, Flodmark.
Critical revision of the manuscript for important intellectual content: Bax, Tydeman, Flodmark.
Statistical analysis: Bax, Tydeman, Flodmark.
Obtained funding: Bax.
Administrative, technical, or material support: Tydeman, Flodmark.
Study supervision: Bax.
Financial Disclosures: None reported.
European Cerebral Palsy Study Lead Investigators: North West London: Martin Bax, Clare Tydeman, Imperial College London; North East London: Lucinda Carr, Great Ormond Street Hospital; Edinburgh: Paul Eunson, Debbie Miller, Royal Hospital for Sick Children; Dublin: Owen Hensey, Susan Keane, Central Remedial Clinic; Helsinki: Lennart von Wendt, Helsinki University Central Hospital, Teija Salokorpi, Foundation for the Rehabilitation of Children and Young People, Mannerheim League for Child Welfare; Tübingen: Ingeborg Krägeloh-Mann, Andrea Bevot, University Children's Hospital; Lisbon: Maria da Graça de Campos Andrada, Teresa Folha, Fernanda Nunes, Centro Rebilitação Paralisa Cerebral Calouste Gulbenkian; Stockholm: Olof Flodmark, Håkan Svan, Gunilla Malm, Karolinska University Hospital, Eva Esscher, Sachsska Barnsjukhuset.
Funding/Support: Ongoing funding for this study is provided by the Castang Foundation, having been initiated by the Little Foundation.
Role of the Sponsor: The funders had no role in the design, collection, analysis, and interpretation of data; in the writing of the report; or in the preparation, review, or decision to submit the manuscript for publication.
Acknowledgment: We thank all those who have helped to make this research possible, especially the children, the parents, and the families who allowed their information to be used. We also thank the numerous clinicians and staff involved in the care of these children who generously gave their time and efforts to help with the study. Statistical advice was provided by Ian Plewis, MSc, Institute of Education, University of London. Additional advice was supplied by Paul Eunson, MbChB, FRCPCH, Royal Hospital for Sick Children, Edinburgh, and Lucinda Carr, MD, MBChB, FRCP, FRCPCH, Great Ormond Street Hospital for Children NHS Trust.