title: Objective sleep of older primiparous Japanese women during the first 4 months postpartum: an actigraphic study.
abstract: This longitudinal study was designed to examine objective sleep parameters of older primiparous Japanese women during the first 4 months postpartum using actigraphy. The participants were 18 older primiparae (Mean (SD) = 37.06 (2.62) years, range 35-44 years) who gave birth to healthy neonates at one of three urban Japanese hospitals. Objective sleep quality was measured using actigraphy for 48 h at 1, 2 and 4 months postpartum. The Friedman test was used to test for differences in sleep parameters across time. Sleep duration (SMIN) increased significantly from 2 months (Mean (M) = 301.94 min) to 4 months (M = 372.78 min). Sleep efficiency (SE) increased significantly from 1 month (73.52%) to 2 (86.66%) and 4 months (89.05%). Waking after sleep onset (WASO) decreased significantly from 1 month (M = 114.64 min) to 2 (M = 40.18 min) and 4 months (M = 38.36 min) and long waking episodes (LWEP) significantly decreased from 1 month (4.67) to 2 (2.69) and 4 months (3.12). Persistent postpartum sleep problems can be a sign of postpartum depression as well as health problems among infants.
authors.affiliation: Graduate School of Nursing, Chiba University, Chiba, Japan.
authors.forename: Hiroko
authors.initials: H
authors.lastname: Iwata
authors.forename: Emi
authors.initials: E
authors.lastname: Mori
authors.forename: Miyako
authors.initials: M
authors.lastname: Tsuchiya
authors.forename: Akiko
authors.initials: A
authors.lastname: Sakajo
authors.forename: Akiko
authors.initials: A
authors.lastname: Saeki
authors.forename: Kunie
authors.initials: K
authors.lastname: Maehara
authors.forename: Harumi
authors.initials: H
authors.lastname: Ozawa
authors.forename: Akiko
authors.initials: A
authors.lastname: Morita
authors.forename: Tomoko
authors.initials: T
authors.lastname: Maekawa
mesh_terms: D056044:Actigraphy; D000328:Adult; D005260:Female; D006801:Humans; D007564:Japan; D008137:Longitudinal Studies; D008423:Maternal Age; D010298:Parity; D049590:Postpartum Period; D012890:Sleep; D012892:Sleep Deprivation / Q000209:etiology*
keywords: actigraphy; maternal age; postpartum; sleep; sleep deprivation