Dados do Trabalho

Título

SLEEP PATTERNS MEASURED BY ACTIGRAPHY IN ADULTS OF A CITY IN SOUTHEASTERN BRAZIL: ISACamp-SONO STUDY

Introdução

Introduction: Quality of sleep and its relation to health habits constitute an important aspect of study in the current scenario of society and, therefore, the use of objective parameters for evaluation of sleep patterns is an essential tool for assessing sleep of the population.

Objetivo

Objective: To describe sleep characteristics of adults from a city located in Southeastern Brazil, according to actigraphic records.

Métodos

Method: An observational, cross-sectional study with 270 individuals who constituted a sub-sample drawn from the Campinas Municipal Health Survey (Inquérito de Saúde do Município de Campinas - ISACamp) 2014/2015. Two groups were formed: Cases (people with sleep complaints, n=215) and Controls (people without sleep complaints, n=55). Participants used an Actiwach 2® actigraph (Phillips Respironics, Inc.) for seven consecutive days, with 1-minute epoch lengths. The following sleep variables were estimated using the Actiware 6.0.8 software algorithm (Phillips Respironics, Inc.): time in bed (TIB), total sleep time (TST), sleep onset latency (SOL), sleep efficiency (SE), wakefulness after sleep onset (WASO) and number of awakenings. The following variables were also selected: gender, age, physical activity, and chronic diseases (hypertension and diabetes). Data were analyzed using the SPSS® 20 software, with descriptive and inferential statistics (Mann-Whitney and Kruskal-Wallis tests, 5% significance level). The study was approved by the Research Ethics Committee of the institution.

Resultados

Results: Among the participants, 52.9% were male and 50.7% were 60 years of age or over. Mean TIB of 474.2 minutes (SD=74.7), TST of 392.7 minutes (SD=70.5), SOL of 11.8 minutes (SD=9.1), SE of 82.9% (SD=6.2%), WASO of 58.6 minutes (SD=25.1) and mean number of awakenings 24.5 (SD=7.6) were observed. The SE was higher in the Control Group (p=0.003) and WASO was higher for the Cases (p=0.046). There was a significant difference between genders, with higher TST (p=0.013), lower SOL (p=0.043), higher SE (p<0.001), lower WASO (p=0.001) and lower number of awakenings (p<0.001) for the women. Higher SOL (p=0.013), lower SE (p=0.001) and higher WASO (p=0.003) were found among the participants that reported napping.

Conclusões

Conclusion: Actigraphy showed to be useful in the evaluation of sleep of the population and may become an important and convenient measure for helping the adoption of practices that favor sleep quality.

Palavras-chave

Descriptors: Actigraphy, Sleep, Sleep Wake Disorders