Several measures of sleep quality can be made. These can be used to assess the effects of various interventions on a patient's sleep.


latency (in minutes) =

= (time of sleep onset) - (time went to bed)


wake after sleep onset =

= (accumulated time awake after sleep onset)


total sleep time =

= (accumulated time asleep after sleep onset)


sleep efficiency =

= (time asleep) / (time in bed)


additional measures:

(1) latency to stage 2 in minutes

(2) latency to REM sleep in minutes


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