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Season of birth variations in the temperament and character inventory of personality in a general population.
Umeå University, Faculty of Medicine, Department of Clinical Sciences, Psychiatry.
Umeå University, Faculty of Medicine, Department of Clinical Sciences, Psychiatry.
Umeå University, Faculty of Medicine, Department of Clinical Sciences, Psychiatry.
2001 (English)In: Neuropsychobiology, ISSN 0302-282X, E-ISSN 1423-0224, Vol. 44, no 1, 19-26 p.Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Since several studies show season of birth variations in morbidity, suicidal behavior and CSF (cerebrospinal fluid) monoamine metabolites, we investigated season of birth variations in personality in the population. METHODS: We analyzed by multiple logistic regressions the Temperament and Character Inventory (TCI) for 2,130 individuals taking part in the Betula prospective random cohort study of Umeå, Sweden. RESULTS: The personality dimensions were correlated significantly with age and gender. We stratified the data according to age, gender and the season of TCI measurement. By the median split in each stratum, a high-value group and a low-value group were obtained for each of the personality dimensions. Those born during February to April were significantly more likely than those born during October to January to have high NS (novelty seeking) among women, particularly the subscale NS2 (impulsiveness vs. reflection), and to have high PS (persistence) among men. Temperament profiles also showed season of birth variations. CONCLUSIONS: We discuss the associations in the literature between personality and the monoamines serotonin and dopamine, and suggest that our results are compatible with a hypothesis of season of birth variation in the monoamine turnover. The personality traits are likely to be influenced by several genetic and environmental factors, one of them being the season of birth.

Place, publisher, year, edition, pages
2001. Vol. 44, no 1, 19-26 p.
Identifiers
URN: urn:nbn:se:umu:diva-36357PubMedID: 11408788OAI: oai:DiVA.org:umu-36357DiVA: diva2:353950
Available from: 2010-09-29 Created: 2010-09-29 Last updated: 2017-12-12

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Citation style
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