A Novel, Open Access Method to Assess Sleep Duration Using a Wrist-Worn Accelerometer.

ABSTRACT: Wrist-worn accelerometers are increasingly being used for the assessment of physical activity in population studies, but little is known about their value for sleep assessment. We developed a novel method of assessing sleep duration using data from 4,094 Whitehall II Study (United Kingdom, 2012-2013) participants aged 60-83 who wore the accelerometer for 9 consecutive days, filled in a sleep log and reported sleep duration via questionnaire. Our sleep detection algorithm defined (nocturnal) sleep as a period of sustained inactivity, itself detected as the absence of change in arm angle greater than 5 degrees for 5 minutes or more, during a period recorded as sleep by the participant in their sleep log. The resulting estimate of sleep duration had a moderate (but similar to previous finding

SUBMITTER: van Hees VT 

PROVIDER: S-EPMC4646630 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature