Dependence of nighttime sleep duration in one-month-old infants on alterations in natural and artificial photoperiod.

ABSTRACT: Human sleep-wake cycles are entrained by both natural and artificial light-dark cycles. However, little is known regarding when and how the photoperiod changes entrain the biological clock after conception. To investigate the dependence of sleep patterns in young infants on the natural and artificial light-dark cycles, 1,302 pairs of one-month-old infants and their mothers were asked to answer a questionnaire. Birth in spring, longer daytime sleep duration, early/regular light-off times, and longer maternal nighttime sleep duration were identified as independent variables for longer infant nighttime sleep duration in both univariate and multivariate analyses. Longer maternal nighttime sleep duration was dependent on shorter naps and early/regular bed times but not on the season. We found t

SUBMITTER: Iwata S 

PROVIDER: S-EPMC5355994 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature