From the Division of Mental Health (B.S., A.M., S.Ø.), Norwegian Institute of Public Health; Faculty of Psychology (B.S., A.M., M.H., S.P., I.H.N., S.Ø.), University of Bergen; Centre for Child and Adolescent Mental Health (M.H.), Uni Health; and Norwegian Competence Center for Sleep Disorders (S.P., I.H.N.), Haukeland University Hospital, Bergen; and Division of Psychiatry (B.S.), Helse-Fonna HF, Haugesund; and Levanger Hospital (S.K.), Nord-Trøndelag Health Trust; and HUNT Research Centre (S.K.), Faculty of Medicine, Norwegian University of Science and Technology, Levanger, Norway; and Finnish Institute of Occupational Health (P.S.), Helsinki; and Department of Psychology (P.S.), University of Turku, Turku, Finland.
Address correspondence and reprint requests to Børge Sivertsen, PhD, Division of Mental Health, Norwegian Institute of Public Health, Christiesgt 13, 5020 Bergen, Norway. E-mail: [email protected]
The funding for this study was provided by the Faculty of Psychology, University of Bergen, Bergen, Norway.
The HUNT study is a collaboration among the HUNT Research Centre (Faculty of Medicine, Norwegian University of Science and Technology [NTNU]), the Nord-Trøndelag County Council, and the Norwegian Institute of Public Health. All authors had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Dr. Salo has financial interest in a small private sleep clinic in Turku, Finland. The sleep clinic had no involvement in this study.
Received for publication September 1, 2011; revision received May 24, 2012.
