Psg calculations Questions Answers
How to you calculate the Total Recording Time (TRT)?
Epoch number of "Lights on" - Epoch number "Lights out" / 2
How do you calculate Total Sleep Time (TST)?
Total epochs of N1 + N2 + N3 + R / 2
How do you calculate Sleep Period Time (SPT)?
Last...
Psg calculations Questions Answers How to you calculate the Total Recording Time (TRT)? - answer Epoch number of "Lights on" - Epoch number "Lights out" / 2
How do you calculate Total Sleep Time (TST)? - answer Total epochs of N1 + N2 + N3 + R / 2
How do you calculate Sleep Period Time (SPT)? - answer Last epoch of sleep - first epoch of sleep / 2
How do you calculate percentage of time in each sleep stage (% N1, % N2, % N3, % R)? - answer % N1= minutes of N1 / TST x 100
% N2 = minutes of N2 / TST x 100
% N3 = minutes of N3 / TST x 100
%R = minutes of R / TST x 100
How do you calculate percentage of wake time? - answer Minutes of W / TRT x 100
How do you calculate Wake after sleep onset (WASO)? - answer Total minutes scored W between the epoch of sleep onset and the last epoch scored as asleep.
How do you calculate Wake before sleep (this is the same as sleep latency) (WBSO)? - answer Total minutes scored W from "lights out" to the first epoch scored as asleep. First epoch scored asleep - "lights out" epoch / 2
How do you calculate Wake after sleep period (WASP)? - answer Total minutes scored W after the last epoch scored as asleep and the epoch of "lights on" "lights on" epoch - last epoch scored as asleep / 2
How do you calculate the Sleep Efficiency Index (SEI or SE)? - answer TST/TRT x 100
How do you calculate Sleep latency? - answer First epoch scored as asleep - "lights out" epoch / 2
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