@article{oai:kanazawa-u.repo.nii.ac.jp:00054131,
 author = {山田, 裕子 and 表, 志津子 and Yamada, Yuko and Omote, Shizuko},
 issue = {2},
 journal = {Journal of wellness and health care, Journal of wellness and health care},
 month = {Feb},
 note = {Purpose: The purpose of this study was to assess the sleep behaviors of Japanese mothers subjectively and objectively and their ５- to ７-month-old infants.  
Methods:  The participants were ３６ pairs of mothers and their ５- to ７-month-old infants.  Each mother and infant were regarded as a pair and their sleep behavior was observed.  Sleep behavior was assessed subjectively and objectively. The subjective data was collected using the self-administered Pittsburgh Sleep Quality Index Japan (PSQI-J)  and Kwansei Gakuin Sleepiness Scale (KSS) questionnaires, and the objective data was  collected using a Lifecorder GS (Suzuken Co., Ltd., Nagoya, Japan) accelerometer. Lifecorder GS data were collected over the same period for both mothers and infants.
Results: The mothers’ subjective PSQI-J sleep assessment score averaged ６.００ ± ２.５８ and their average sleep efficiency was ８４.５７ ± １１.９６%. The Lifecorder GS objectively measured the mothers’ average sleep efficiency at ７５.２１ ± ８.２９% and the number of periods of awakening spanning １０ minutes or more as ３.６４ ± １.５６ periods. Subjective and objective sleep efficiency data were significantly different (p<０.０１).  The average sleep efficiency for infants, as measured by the Lifecorder GS, was ６６.７０ ± ９.５９%, and their average number of periods of awakening spanning １０ minutes or more was ６.３４ ± １.６１ times. The correlation coefficient for mother and infant sleep duration was ０.４４ (p<０.０１). There were two types of awakening during sleep; one in which the mother’s awakening preceded the infant’s, and the other in which the infant’s awakening preceded the mother’s. It was confirmed that sleep and awakening could be bidirectional between the mother and the infant.
Conclusions: There was a significant difference in the subjective and objective sleep efficiency data for mothers who had ５- to ７-month-old infants. The mothers did not feel that their sleep efficiency had been adversely affected due to sleep interruption to care for their infants, however, objectively it was confirmed that sleep efficiency was lowered.   The researchers think there is a need to develop education to improve sleep quality for Japanese mothers and their infants while carefully maintaining the child-raising culture.},
 pages = {35--44},
 title = {Subjective and objective assessment of sleep behaviors of Japanese mothers and their 5- to 7-month-old infants},
 volume = {44},
 year = {2021}
}