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

• Autor(a) principal: Volcov,Cristina Furtado
• Data de Publicação: 2021
• Outros Autores: Pinheiro,Eliana Moreira, Tsunemi,Miriam Harumi, Amaral,Fernanda Gaspar do, Avelar,Ariane Ferreira Machado, Hocking,Jennifer, Coca,Kelly Pereira
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Brasileira de Enfermagem (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71672021000600165
• topic: Circadian Rhythm; Lighting; Melatonin; Nursing; Postpartum Women

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.