@article{oai:air.repo.nii.ac.jp:00005974,
 author = {Ando, Akiko and Ohta, Hidenobu and Yoshimura, Yuko and Nakagawa, Machiko and Asaka, Yoko and Nakazawa, Takayo and Mitani, Yusuke and Oishi, Yoshihisa and Mizushima, Masato and Adachi, Hiroyuki and Kaneshi, Yosuke and Morioka, Keita and Shimabukuro, Rinshu and Hirata, Michio and Ikeda, Takashi and Fukutomi, Rika and Kobayashi, Kyoko and Ozawa, Miwa and Takeshima, Masahiro and Manabe, Atsushi and Takahashi, Tsutomu and Mishima, Kazuo and Kusakawa, Isao and Yoda, Hitoshi and Kikuchi, Mitsuru and Cho, Kazutoshi},
 journal = {SCIENTIFIC REPORTS},
 month = {},
 note = {Our recent study on full-term toddlers demonstrated that daytime nap properties affect the distribution ratio between nap and nighttime sleep duration in total sleep time but does not affect the overall total amount of daily sleep time. However, there is still no clear scientific consensus as to whether the ratio between naps and nighttime sleep or just daily total sleep duration itself is more important for healthy child development. In the current study, to gain an answer to this question, we examined the relationship between the sleep properties and the cognitive development of toddlers born prematurely using actigraphy and the Kyoto scale of psychological development (KSPD) test. 101 premature toddlers of approximately 1.5 years of age were recruited for the study. Actigraphy units were attached to their waist with an adjustable elastic belt for 7 consecutive days and a child sleep diary was completed by their parents. In the study, we found no significant correlation between either nap or nighttime sleep duration and cognitive development of the preterm toddlers. In contrast, we found that stable daily wake time was significantly associated with better cognitive development, suggesting that sleep regulation may contribute to the brain maturation of preterm toddlers.},
 title = {Sleep maturation influences cognitive development of preterm toddlers},
 volume = {11},
 year = {2021}
}