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Relationship between duration of crying/fussy behavior and actigraphic sleep measures in early infancy

Hitomi Shinohara1, Hideya Kodama

  • 1Department of Maternity Child Nursing, Akita University Graduate School of Medicine and Faculty of Medicine, Japan.

Early Human Development
|July 24, 2012
PubMed

Insights

Early infant crying and active sleep patterns show parallel development in some babies. However, this link is influenced by factors like gestational age and co-sleeping, not directly by crying duration.

Area of Science:

  • Pediatric Sleep Medicine
  • Infant Development
  • Behavioral Pediatrics

Background:

  • Understanding infant sleep development is crucial for early childhood well-being.
  • Crying is a primary communication method for infants, often linked to their needs and development.
  • Objective sleep evaluation methods are essential for accurate research in infant sleep.

Purpose of the Study:

  • To investigate the relationship between infant crying duration and sleep development using longitudinal, objective measures.
  • To analyze how sleep patterns, specifically active sleep, correlate with crying episodes in the first four months of life.
  • To identify covariates influencing the association between crying and sleep development.

Main Methods:

  • Prospective longitudinal study of 31 healthy term infants during the first 4 months of life.
  • Mothers recorded infant crying duration, and actigraphy was used for objective sleep measurement at 4-6, 8-10, and 14-16 weeks.
  • Cross-sectional and longitudinal analyses examined the relationship between crying and sleep, with multiple regression analyzing covariate impacts.

Main Results:

  • A significant correlation was observed between crying duration and the proportion of active sleep at 14-16 weeks and longitudinally.
  • Gestational age and co-sleeping significantly impacted the proportion of active sleep.
  • Multiple regression analysis indicated gestational age and co-sleeping were positively associated with active sleep, but crying duration was not.

Conclusions:

  • The parallel decrease in crying and active sleep proportion in some infants is likely influenced by covariates like co-sleeping and gestational age.
  • These covariates may affect both crying patterns and sleep development, suggesting overlapping regulatory mechanisms.
  • The direct association between crying duration and active sleep proportion is not supported when accounting for influential covariates.
Abstract

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