Morningness-eveningness in children

2014 Fiscal Year Final Research Report

• Project/Area Number: 23390181
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Hygiene and public health
• Research Institution: National Institute of Public Health
• Principal Investigator: DOI Yuriko 国立保健医療科学院, その他部局等, 統括研究官 (70280758)
• Co-Investigator(Kenkyū-buntansha): ISHIHARA Kaneyoshi ノートルダム清心女子大学, 人間生活学部, 教授 (80159756) ; UCHIYAMA Makoto 日本大学, 医学部, 教授 (20221111)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 母子保健 / 睡眠 / 朝型-夜型タイプ / 概日リズム / 幼児 / CCTQ / 疫学 / 行動問題

Outline of Final Research Achievements

We developed the Japanese version of Children’s ChronoType Questionnaire (CCTQ-J) and confirmed that it was a reliable and valid measure for assessing morningness-eveningness in children. We conducted a nationwide survey of sleep and health for preschool children aged 4-6 years attending kindergarten and childcare centers. Morning-, neither-, and evening-types accounted for 32.4%, 57.4%, and 10.3% of the participants, respectively. Eveningness was significantly associated with the delayed timing, shorter duration, and irregularity of sleep-wake parameters, and behavioral problems such as hyperactivity/inattention and conduct problems.

Free Research Field

医歯薬学