ORIGINAL ARTICLES   

Gazzetta Medica Italiana Archivio per le Scienze Mediche 2016 June;175(6):235-40

Copyright © 2016 EDIZIONI MINERVA MEDICA

lingua: Inglese

Sitting time as a predictor of poor sleep quality in active older women

Marco A. LEITE, Joilson MENEGUCI, Jeffer E. SASAKI, Renato M. RIBEIRO, Sheilla TRIBESS, Jair S. VIRTUOSO Jr.

Center for Research on Physical Activity and Health, Federal University of Triângulo Mineiro, Uberaba, Brazil

BACKGROUND: The aim of this study was to analyze the relationship between time spent sitting and poor sleep quality in active older women.
METHODS: A cross-sectional study was conducted with 207 active older women. Sitting time was evaluated using questions regarding time spent seated on a usual weekday and a usual weekend day according to the International Physical Activity Questionnaire. A single question “In the last 30 days, how frequently did you consider you slept well?” was used to measure sleep quality. Receiver Operating Characteristic curves (ROC) were used to identify cut-points of sitting time (minutes/day) that predict poor sleep quality during weekdays and weekend days.
RESULTS: The median (25th, 75th percentile) of time spent sitting on weekdays and weekend days were 270.00 (185.00, 360.00) and 300.00 (240.00, 420.00), respectively. Sleep quality was negatively reported by 38.6% (N.=80) of the participants. Sitting time was a good discriminator of poor sleep quality with areas under the ROC curves presenting values >0.50. It was observed that values >230 and >295 minutes/day of sitting time were the best cut-points for predicting poor sleep quality during weekdays and weekend days, respectively.
CONCLUSIONS: Sitting time is related to poor sleep quality. This behavior can serve as an important indicator to define priority groups for interventions.