Figure 1.
Labeling of body axes and placement of acceleration sensors.
Table 1.
Indicators of sleep duration derived from accelerometry.
Table 2.
Indicators of sleep quality derived from accelerometry.
Table 3.
Association between self-reported sleep duration and time supine during study night.
Table 4.
Associations between objective sleep indicators and self-reported sleep quality as well as age.
Figure 2.
Age differences in sleep duration.
Lines represent age differences in self-reported usual sleep duration in the representative SOEP survey for 2008, in self-reported sleep duration during the study night, and in sleep duration based on activity measures during the study night.