Document Detail


Associations of urinary 6-sulfatoxymelatonin with demographics, body mass, sex steroids, and lifestyle factors in preschool Japanese children.
MedLine Citation:
PMID:  23266102     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: We aimed to assess the associations of sex, age, body mass, sex steroid hormones, and lifestyle factors with the levels of melatonin in young children. METHODS: This study followed a cross-sectional design and was conducted two preschools in Japan. Subjects were 235 boys and 203 girls, aged 3-6 years. Information related to demographics, body mass, and lifestyle factors was obtained from parent-administered questionnaires. The levels of 6-sulfatoxymelatonin and dehydroepiandrosterone in first-void morning urine were measured by radioimmunoassay. Urinary estrone, estradiol, testosterone, and 5-androstene-3β, 17α diol levels were measured by liquid chromatography-electrospray ionization tandem mass spectrometry. RESULTS: The creatinine-corrected 6-sulfatoxymelatonin levels and the estimated value of 6-sulfatoxymelatonin excretion were higher in girls than in boys. After adjustments for age, the creatinine-corrected 6-sulfatoxymelatonin was negatively associated with weight and body mass index among boys and with weight and height among girls. However, the estimated value of 6-sulfatoxymelatonin excretion was not associated with any indices of body mass. No significant relationships of urinary sex steroids, light exposure at night, sleep time, sedentary lifestyles, or passive smoking with urinary 6-sulfatoxymelatonin were observed. CONCLUSIONS: Our findings suggest that melatonin levels depend on sex and body size among young healthy children. Our results should be confirmed in future researches.
Authors:
Keiko Wada; Kozue Nakamura; Yuya Tamai; Michiko Tsuji; Takako Masue; Kaori Watanabe; Kyoko Ando; Chisato Nagata
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-19
Journal Detail:
Title:  Annals of epidemiology     Volume:  -     ISSN:  1873-2585     ISO Abbreviation:  Ann Epidemiol     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9100013     Medline TA:  Ann Epidemiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2013 Elsevier Inc. All rights reserved.
Affiliation:
Department of Epidemiology and Preventive Medicine, Gifu University Graduate School of Medicine, Gifu, Japan. Electronic address: dr_keiko@gifu-u.ac.jp.
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