Abstract
Objective: To confirm prior findings that the larger the maximum monthly increase in solar insolation in springtime, the younger the age of onset of bipolar disorder. Method: Data were collected from 5536 patients at 50 sites in 32 countries on six continents. Onset occurred at 456 locations in 57 countries. Variables included solar insolation, birth-cohort, family history, polarity of first episode and country physician density. Results: There was a significant, inverse association between the maximum monthly increase in solar insolation at the onset location, and the age of onset. This effect was reduced in those without a family history of mood disorders and with a first episode of mania rather than depression. The maximum monthly increase occurred in springtime. The youngest birth-cohort had the youngest age of onset. All prior relationships were confirmed using both the entire sample, and only the youngest birth-cohort (all estimated coefficients P < 0.001). Conclusion: A large increase in springtime solar insolation may impact the onset of bipolar disorder, especially with a family history of mood disorders. Recent societal changes that affect light exposure (LED lighting, mobile devices backlit with LEDs) may influence adaptability to a springtime circadian challenge.
Original language | English |
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Pages (from-to) | 571-582 |
Number of pages | 12 |
Journal | Acta Psychiatrica Scandinavica |
Volume | 136 |
Issue number | 6 |
DOIs | |
State | Published - Dec 2017 |
Externally published | Yes |
Funding
Funders | Funder number |
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2ChronoRecord Association | |
41Department of Medical Epidemiology and Biostatistics | |
43Department of Clinical Medicine, Aalborg University | |
53Asha Bipolar Clinic | |
60Department of Psychiatry and Behavioral Sciences | |
63Department of Neuroscience and Mental Health | |
70McLean Hospital-Harvard Medical School | |
71Mood Disorder Lucio Bini Centers, Cagliari e Roma | |
73Consejo Nacional de Ciencia y Tecnología | |
75Department of Psychiatry and Biobehavioral Sciences | |
AOUS | |
Asha Hospital | |
Capodistrian University of Athens | |
Centre for Youth Mental Health | |
Denis Diderot University | |
Division of Mental Health and Addiction | |
Favaloro University | |
Federal University of Bahia | |
Florey Institute for Neuroscience and Mental Health | |
Hopitaux Universitaires Henri Mondor | |
IMRB | |
INSERM U955 | |
Institute of Neuroscience and Physiology | |
K.G. Jebsen Centre for Psychosis Research | |
Mayo Clinic Depression Center | |
Michigan State University College of Human Medicine, Traverse City | |
National Centre for Excellence in Youth Mental Health | |
Oslo University Hospital & Institute of Clinical Medicine, University of Oslo | |
Pratiksha trust | |
RenéDescartes University | |
Sahlgrenska Academy, University of Gothenburg | |
School of Medicine, Aristotle University of Thessaloniki | |
Stanford School of Medicine | |
Swedish federal government | ALFGBG-142041, ALF 20130032 |
Tokyo Metropolitan Matsuzawa Hospital | |
UnitéPerception et Mémoire | |
Universidade Federal do Rio Grande do Sul, Porto Alegre | |
University Hospital Carl Gustav Carus | |
University of Cologne Medical School | |
University of Helsinki and Helsinki University Hospital | |
University of Missouri Kansas City School of Medicine, Kansas City | |
University of Siena Medical Center | |
University of São Paulo Medical School | |
UniversitéParis Est | |
Mayo Clinic | |
Northwestern University | |
University of California, Los Angeles | |
University of California, San Diego | |
Feinberg School of Medicine | |
Norges Teknisk-Naturvitenskapelige Universitet | |
Chapman University | |
Neuroscience Institute, University of Tennessee | |
Jane and Terry Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles | |
Università degli Studi di Siena | |
Tokyo Metropolitan Institute of Medical Science | |
School of Medicine, University of Maryland | |
Fondation FondaMental | |
National Institute of Mental Health and Neurosciences | |
National Health and Medical Research Council | 1059660 |
Department of Biotechnology, Ministry of Science and Technology, India | |
Department of Science and Technology, Ministry of Science and Technology, India | |
Institut national de la santé et de la recherche médicale | UMR-S1144 |
Stiftelsen för Strategisk Forskning | KF10-0039 |
Deakin University | |
University of Melbourne | |
Technische Universität Dresden | |
Euskal Herriko Unibertsitatea | |
Institut Pasteur | |
Karolinska Institutet | |
Vetenskapsrådet | K2010-61P-21568-01-4, K2014-62X-14647-12-51 |
Universiti Malaya | |
Ben-Gurion University of the Negev | |
Universidad de Antioquia | |
Hacettepe Üniversitesi | |
Norges Forskningsråd | 223273 |
Göteborgs Universitet | |
Sahlgrenska Akademin | |
Universitat de Barcelona | |
Centro de Investigación Biomédica en Red de Salud Mental | |
Tartu Ülikool | |
Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz | |
Uniwersytet Medyczny im. Karola Marcinkowskiego w Poznaniu | |
Université de Tunis El Manar |
Keywords
- bipolar disorder
- circadian rhythm
- epidemiology
- solar insolation