ショウジ　ナオト   SHOJI NAOTO   庄司　直人    所属   朝日大学  保健医療学部健康スポーツ科学科 健康体力科学    職種   教授
言語種別	英語
発行・発表の年月	2020/05
形態種別	研究論文（学術雑誌）
査読	査読あり
標題	Sexual difference in 2nd-to-4th digit ratio among 1.5-year-old Japanese children: A cross-sectional study of Aichi regional adjunct cohort of the Japan Environment and Children's Study (JECS-A)
執筆形態	共著
掲載誌名	Early Human Development
掲載区分	国外
出版社・発行元	Elsevier
巻・号・頁	146
総ページ数	8
担当範囲	データキュレーション、インベスティゲーション
著者・共著者	Yasuyuki Yamada, Takeshi Ebara, Chikae Yamaguchi, Taishi Miyachi, Naoto Shoji, Taro Matsuki, Hirohisa Kano, Masataka Hirosawa, Michihiro Kamijima
概要	Aims:This study aimed to examine 2D:4D measurements and sexual differences in Japanese toddlers aged1.5 years.Study design and subjects:The digit lengths used to calculate 2D:4D were measured using an easy-to-use pho-tography method. A total of 1045 JECS-A (the Aichi regional sub-cohort of the Japan Environment andChildren's Study) children (males, 523; females, 522) aged 1.5 years were analyzed.Results:The mean ages for the males and females were 575.3 ± 13.1 and 575.9 ± 17.1 days, respectively.Histograms of left and right 2D:4D were normally distributed regardless of sex (left male, 0.909 ± 0.048; leftfemale, 0.913 ± 0.049,d= 0.08; right male, 0.938 ± 0.055; right female, 0.937 ± 0.049,d= 0.02).Because of high dispersion in the data,t-tests did not support a significant sex difference in 2D:4D. Post-hocstatistical power was calculated as 0.124 and the effect size for the sex difference in 2D:4D was 0.036.
DOI	10.1016/j.earlhumdev.2020.105050
ISSN	0378-3782
PMID	32387816