Submitted for Publication: February 22, 2013; final revision received June 20, 2013; accepted June 26, 2013.
Published Online: December 5, 2013. doi:10.1001/jamaophthalmol.2013.5812.
Study concept and design: All authors.
Acquisition of data: All authors.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Holmström.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Holmström, Källen.
Obtained funding: Holmström, Källen, Hellström, Serenius, Stjernqvist, Tornqvist.
Administrative, technical, and material support: All authors.
Study supervision: All authors.
Conflict of Interest Disclosures: None reported.
Funding/Support: The study was supported by the Birgit and Sven Håkan Olsson Foundation, the Evy and Gunnar Sandberg Foundation, the “Lilla Barnets Fond” Children’s Fund, the Nordströmer Foundation, a research grant from Region Skåne, Stiftelsen för synskadade i fd M-län, the Swedish Association of the Visually Impaired, and grants 2006 to 3855 from the Swedish Research Council.
Role of the Sponsor: The funding sources had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: The following members of the Extremely Preterm Infants in Sweden Study (EXPRESS) Group contributed to the study: Mats Blennow, MD, PhD, and Mikael Norman, MD, PhD (Department of Clinical Science, Intervention and Technology, Karolinska Instututet, Stockholm), Uwe Ewald, MD, PhD, Gunnar Sjörs, MD, PhD, and Bo Strömberg, MD, PhD (Department of Women’s and Children’s Health, Uppsala University, Uppsala), Vineta Fellman, MD, PhD (Department of Pediatrics, Clinical Sciences Lund, Lund University, Lund), Eva Lindberg, MD, PhD (Department of Pediatrics, Örebro University, Örebro), Pia Lundqvist, RN, PhD (Department of Health Sciences, Lund University, Lund), Karel Maršál, MD, PhD (principal investigator) and Grozda Pajic (Department of Obstetrics and Gynecology, Clinical Sciences, Lund University, Lund), Elisabeth Olhager, MD, PhD (Department of Clinical and Experimental Medicine, Linköping University, Linköping), and Lennart Stigson, MD (Department of Pediatrics, Institute of Clinical Sciences, Sahlgrenska Academy, Gothenburg University, Gothenburg), Sweden. In addition, Gunnar Lindgärde, MD (St Eriks Eye Hospital, Stockholm) and Kent Johansson, MD (Norrland University Hospital, Umeå) provided valuable help with examinations and data input. The following pediatric ophthalmologic colleagues participated in the 2.5-year follow-up phase: Pia Agervi, MD, PhD, Bahra Arif, MD, Ewa Czechowska, MD, Thomas Krebser, MD, Stefan Löfgren, MD, PhD, Kristina Teär-Fahnehjelm, MD, PhD, and Agneta Wallin, MD (St Eriks Eye Hospital, Stockholm), Birgitta Carlsson, MD (University Hospital, Örebro), Ylva Friberg Riad, MD (Skaraborgs Sjukhus, Skövde), Lena Hilmertz, MD (Centralsjukhuset, Karlstad), Anna-Lena Hård, MD, PhD (The Queen Silvia Children’s Hospital, Sahlgrenska Academy, University of Gothenburg, Gothenburb), Eva Larsson, MD, PhD, and Hanna Åkerblom, MD (Department of Neuroscience/Ophthalmology, University Hospital, Uppsala), Birgitta Sunnqvist, MD (Ryhov Hospital, Jönköping), and Janina Waga, MD (University Hospital, Lund), Sweden. The contributors received no financial compensation.