Fig. 2From: The feasibility and reliability of actigraphy to monitor sleep in intensive care patients: an observational studyBland–Altman plots: Horizontal line drawn at the mean difference and at the mean difference plus and minus 1.96 times the standard deviation of the differences, with the y-axis reporting mean duration determine by polysomnography. a Polysomnography versus Actigraphy assessment of total sleep time. b Polysomnography versus Actigraphy assessment of wakeful states for the study cohort. Graphs c and d depict Polysomnography versus Actigraphy assessment of total sleep time amongst mechanically ventilated patients (c) and Polysomnography versus Actigraphy assessment of wakeful states for patients receiving mechanical ventilation (d). Non-ventilated patient total sleep time (PSG vs ACTG), and wake time (PSG vs ACTG) is represented in graph e and fBack to article page