ABSTRACT
OBJECTIVE: In a device based on midsagittal jaw movements analysis, we assessed a sleep-wake
automatic detector as an objective method to measure sleep in healthy adults by comparison
with wrist actigraphy against polysomnography (PSG).
METHODS: Simultaneous and synchronized in-lab PSG, wrist actigraphy and jaw movements were
carried out in 38 healthy participants. Epoch by epoch analysis was realized to assess
the ability to sleep-wake distinction. Sleep parameters as measured by the three devices
were compared. This included three regularly reported parameters: total sleep time,
sleep onset latency, and wake after sleep onset. Also, two supplementary parameters,
wake during sleep period and latency time, were added to measure quiet wakefulness
state.
RESULTS: The jaw movements showed sensitivity level equal to actigraphy 96% and higher specificity
level (64% and 48% respectively). The level of agreement between the two devices was
high (87%). The analysis of their disagreement by discrepant resolution analysis used
PSG as resolver revealed that jaw movements was right (58.9%) more often than actigraphy
(41%). In sleep parameters comparison, the coefficient correlation of jaw movements
was higher than actigraphy in all parameters. Moreover, its ability to distinct sleep-wake
state allowed for a more effective estimation of the parameters that measured the
quiet wakefulness state.
CONCLUSIONS: Midsagittal jaw movements analysis is a reliable method to measure sleep. In healthy
adults, this device proved to be superior to actigraphy in terms of estimation of
all sleep parameters and distinction of sleep-wake status.
Keywords:
Actigraphy - Movement - Sleep Wake Disorders - Sleep