Sleep-Related Nighttime Crying (<i>Yonaki</i>) in Japan: A Community-Based Study

Fukumizu, Michio; Kaga, Makiko; Kohyama, Jun; Hayes, Marie J.

doi:10.1542/peds.2004-0815c

Cited by 44 publications

(49 citation statements)

References 29 publications

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“…The ratio of infants with sleep problems assessed by actigraph was 23% in this study. This ratio is consistent with the results reported previously [5]. Also, the sleep measures estimated from activity data in this study were not inferior compared to the previous study which was conducted in western countries where bed-share is not recommended [21].…”

Section: Infant's Sleepsupporting

confidence: 92%

“…These results could be explained by the unique Japanese cultural background. Parents with small children prefer to sleep on a Japanese traditional type of mattress, which is called "futon" in Japan [5]. In case of using futons, even though infants and their parents sleep on their own futon, parents usually spread the infant's futon on the floor in close proximity to the parent's futon.…”

Section: Infant's Sleepmentioning

confidence: 99%

“…However, sleep problems, such as night crying and restlessness, are likely to occur after establishment of sleep-wake cycle [3,4]. It was reported that 10-30 percent of children were assessed to have behaviorally induced insufficient sleep [5]. They have difficulty falling asleep, and wake up frequently at night.…”

Section: Introductionmentioning

confidence: 99%

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Sleep Pattern of Japanese Infants and Their Mother’s Parenting Stress

Asaka¹

2013

J Women’s Health Care

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Aim: The aim of this study was to investigate the relationship between sleep of healthy infants and their mother's parenting stress in Japan.Methods: Cross-sectional study. Data obtained from 48 healthy mothers and their infants aged from 6-month old to 24-month old were studied. The mothers completed questionnaires including the Parenting Stress Index Short Form (PSI Short Form), and infant's sleep measures were assessed by an actigraph (Micro-mini RC, Ambulatory Monitoring Inc., Ardsley, NY).Results: All infants, except one, shared a room with their mothers for sleeping. Of these infants, 22 infants shared a bed with their mothers. Sleep measures including sleep quality showed developmental change along with their age. However, the score of maternal parenting stress did not change. Maternal parenting stress is significantly differed by the mother's perception of infant's sleep. Conclusion:Room-share is common lifestyle among Japanese mothers raising infants and sleep development of infants was confirmed. Thus, the health care providers could give information that bed-share and room-share does not affect infant's sleep development during early stage of infancy in Japan. Maternal subjective perception of infant's sleep is associated with parenting stress rather than sleep assessments by objective methods.

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Section: Infant's Sleepsupporting

confidence: 92%

Section: Infant's Sleepmentioning

confidence: 99%

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Sleep Pattern of Japanese Infants and Their Mother’s Parenting Stress

Asaka¹

2013

J Women’s Health Care

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“…[4][5][6][7] Higher prevalence of night waking in infancy has been associated with male gender, higher number of naps per day, exclusive breastfeeding, bed-sharing, being nursed to sleep, lower socioeconomic groups, and infant-demanding parenting method of care (prolonged holding, frequent breastfeeding, rapid response to infant frets and cries, and cosleeping with infants at night). 3,5,[8][9][10] Caffeine is a central stimulant and somnolytic agent. 11 Studies have revealed that caffeine interferes with sleep onset in adults and has a doseresponse effect similar to those seen during insomnia.…”

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confidence: 99%

Maternal Caffeine Consumption and Infant Nighttime Waking: Prospective Cohort Study

2012

PEDIATRICS

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WHAT'S KNOWN ON THIS SUBJECT: Fetus and infants until 3 months of age are unable to metabolize caffeine, which crosses the placenta and in adults has a somnolytic effect. Little is known about the effect of caffeine consumption by pregnant or nursing mothers over infant sleeping. WHAT THIS STUDY ADDS:In this setting where caffeine is largely consumed in pregnancy and by nursing mothers, heavy consumption ($300 mg/day) did not increase the number of nighttime awakenings by their 3-month-old infants.abstract OBJECTIVE: Coffee and other caffeinated beverages are commonly consumed in pregnancy. In adults, caffeine may interfere with sleep onset and have a dose-response effect similar to those seen during insomnia. In infancy, nighttime waking is a common event. With this study, we aimed to investigate if maternal caffeine consumption during pregnancy and lactation leads to frequent nocturnal awakening among infants at 3 months of age.METHODS: All children born in the city of Pelotas, Brazil, during 2004 were enrolled on a cohort study. Mothers were interviewed at delivery and after 3 months to obtain information on caffeine drinking consumption, sociodemographic, reproductive, and behavioral characteristics. Infant sleeping pattern in the previous 15 days was obtained from a subsample. Night waking was defined as an episode of infant arousal that woke the parents during nighttime. Multivariable analysis was performed by using Poisson regression. RESULTS:The subsample included 885 of the 4231 infants born in 2004. All but 1 mother consumed caffeine in pregnancy. Nearly 20% were heavy consumers ($300 mg/day) during pregnancy and 14.3% at 3 months postpartum. Prevalence of frequent nighttime awakeners (.3 episodes per night) was 13.8% (95% confidence interval: 11.5%-16.0%). The highest prevalence ratio was observed among breastfed infants from mothers consuming $300 mg/day during the whole pregnancy and in the postpartum period (1.65; 95% confidence interval: 0.86-3.17) but at a nonsignificant level.CONCLUSIONS: Caffeine consumption during pregnancy and by nursing mothers seems not to have consequences on sleep of infants at the age of 3 months. Pediatrics 2012;129:860-868

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“…Furthermore, infants sleeping with their parents is common in Japan and is traditionally accepted. 19,20 In the current infant health check-up system, the Mother and Child Health Law makes no provision for information or education for parents on infant sleep patterns.…”

mentioning

confidence: 99%