Comparison of sleep quality assessed by actigraphy and questionnaires to healthy subjects

Abstract

Sleep quality analysis is crucial for human health and it is related to duration, rhythm and quality. The goal of this study is to analyze objective assessment of the sleep-wake cycles with actigraphy, subjective questionnaires and their relationship with sleep quality indices. A wearable actigraph registered the sleep habits of 41 healthy subjects for 9 days. Afterwards, the subjects filled two questionnaires about sleep quality (Pittsburgh Sleep Quality Index) and sleepiness (Epworth Sleepiness Scale). The subjects were divided into two groups based on cut-off scores and the actigraphy parameters were compared between groups. Group 1 in ESS and PSQI categorization had less diurnal sleepiness and better sleep quality, respectively, than Group 2. Measurements of regularity (IS), fragmentation (IV), active phase amplitude (M10), rest amplitude (L5), and relative amplitude (RA) were compared between groups. Group 2 had higher L5 values. Parameter L5 (lowest of 5 consecutive hours of activity) was concluded to be relevant to identify the sleep conditions of the subjects.

Actigraphy-based evaluation of sleep quality and physical activity in individuals with spinal cord injury

“…Thus, sleep duration might be misestimated because some insomniac patients, for example, often complain of staying awake but remain immobile in bed [31]. In addition, our results revealed a non-significant decrease of the mean amplitude of movements during the most active and less active periods (M10 and L5) in the SCI group, which might have contributed to the overestimation of the time in bed and sleep duration [32]. However, time estimation is a complex cognitive task, which is especially challenging when the period includes sleep [33].…”

Measures of Sleep in Rheumatologic Diseases: Sleep Quality Patient‐Reported Outcomes in Rheumatologic Diseases

“…Other studies have shown no correlation with polysomnography (29). The ESS has not shown any correlation with actigraphy (84).…”

Estudo Da Utilização De Ligas De Memória De Forma Em Aeronaves Não Tripuladas

“…Índice Remissivo U Umidade 1,2,3,4,5,6,7,48,50,51,52,53,54,55,56,65,66,67,69,70,71,73,74,75 V Variação 22,23,26,27,68,104,110 Velocidade 18,35,38,39,45,50,57,58,64,68,69,70,85,89,103,131,132,133,134,135,136,144…”