Objective Sleep Measurement with ActiGraph

Objective sleep data were measured by using ©wGT3X-BT ActiGraphs (ActiGraph™; Pensacola, FL, USA), which capture continuous, high-resolution physical activity and provide sleep/wake analysis. ActiGraph data were processed using the ©ActiLife software and the implemented Cole–Kripke algorithm (38 (link)) with a pre-defined sleep epoch length of 60 s; we here focused on SE and SOL of that algorithm. In addition, participants were asked to keep a daily sleep log, where individual lights on/off was recorded. Participants were instructed to provide these timings immediately before switching off and after turning on the lights.

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Eigl E.S., Urban-Ferreira L.K, & Schabus M. (2023). A low-threshold sleep intervention for improving sleep quality and well-being. Frontiers in Psychiatry, 14, 1117645.

Publication 2023

Actigraph Epoch Lights Sleep

Corresponding Organization : University of Salzburg

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Variable analysis

independent variables

Sleep and wake timings recorded in the daily sleep log by participants

dependent variables

Sleep efficiency (SE)
Sleep onset latency (SOL)

control variables

Sleep epoch length of 60 seconds used in the ActiGraph data processing
Cole-Kripke algorithm used for sleep/wake analysis

controls

No positive or negative controls were explicitly mentioned in the information provided.

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