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
