Quasi-experimental study of effects of lighting on rest, activity and melatonin in postpartum women

Journal article


Volcov, Cristina Furtado, Pinheiro, Eliana Moreira, Tsunemi, Miriam Harumi, do Amaral, Fernanda Gaspar, Avelar, Ariane Ferreira Machado, Hocking, Jennifer and Coca, Kelly Pereira. (2021). Quasi-experimental study of effects of lighting on rest, activity and melatonin in postpartum women. Revista Brasileira de Enfermagem. 74(6), p. Article :e20201064. https://doi.org/10.1590/0034-7167-2020-1064
AuthorsVolcov, Cristina Furtado, Pinheiro, Eliana Moreira, Tsunemi, Miriam Harumi, do Amaral, Fernanda Gaspar, Avelar, Ariane Ferreira Machado, Hocking, Jennifer and Coca, Kelly Pereira
Abstract

Objectives:
to compare the parameters of the activity/rest cycle of early postpartum breastfeeding women under a controlled and uncontrolled long wavelength ray light regimen.

Methods:
quasi-experimental study with breastfeeding women and their babies during postnatal rooming-in, São Paulo, Brazil. Participants were allocated to either an experimental (intervention) or a comparison group. The intervention involved exposure of the woman in a controlled room with artificial long wavelength ray light at night. Each woman’s level of 6-sulfatoxymelatonin at 24 hours and activity/rest times was analyzed.

Results:
the mean activity/rest times of women in the experimental and comparison groups were similar. The mean percentages of total load of 6-sulfatoxymelatonin during the day and night were similar (p=0.09). At 24 hours, the experimental group presented a significantly lower mean percentage of total load compared to the comparison group (p=0.04).

Conclusions:
women who stayed in the room with long-wavelength artificial light showed no difference in activity/rest and 6-sulfatoxymelatonin levels in the early postpartum period.

Keywordscircadian rhythm; lighting; melatonin; nursing; postpartum women
Year2021
JournalRevista Brasileira de Enfermagem
Journal citation74 (6), p. Article :e20201064
PublisherAssociacao Brasileira de Enfermagem
ISSN1984-0446
Digital Object Identifier (DOI)https://doi.org/10.1590/0034-7167-2020-1064
PubMed ID34406235
Open accessPublished as ‘gold’ (paid) open access
Page range1-8
Publisher's version
License
File Access Level
Open
Output statusPublished
Publication dates
Online2021
Publication process dates
Accepted04 Jan 2021
Deposited29 May 2023
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