Article Publish Status: FREE
Abstract Title:

Birth season and vitamin D concentration in adulthood.

Abstract Source:

Ann Transl Med. 2015 Sep ;3(16):231. PMID: 26539448

Abstract Author(s):

Giuseppe Lippi, Patrizia Bonelli, Ruggero Buonocore, Rosalia Aloe

Article Affiliation:

Giuseppe Lippi

Abstract:

BACKGROUND: Recent evidences suggest that the season of birth may influence human development and vulnerability to develop certain diseases.

METHODS: A retrospective analysis was hence carried out in the laboratory information system of the University Hospital of Parma (North-West Italy), to retrieve values of total serum vitamin D (25-hydroxyvitamin D) measured in a the whole cohort of unselected outpatients age 18 years and older referred for routine health check-up during January to December 2014. Vitamin D was then stratified according to birth season.

RESULTS: The study population consisted in 11,150 unselected Italian residents (median age 62 years; 8,592 women and 2,558 men). Serum vitamin D values were found to be significantly lower in subjects born in winter than in those born in spring and summer. More specifically, winter season birth was associated with 11% increased risk of developing vitamin D deficiency later in life compared to spring birth. Daily sunlight hours at birth independently predicted vitamin D concentration in adulthood.

CONCLUSIONS: The results of this large, cross-sectional retrospective investigation attest that subjects born in winter have a total vitamin D concentration in adulthood that is significantly lower than those born in seasons with longer daylight periods.

Study Type : Human Study

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