RPSGT EQUATIONS QUESTIONS AND ANSWERS
What is the equation for TRT - Answers - (lights on-lights out) / 2
What is the equation for TWT - Answers - (total wake epochs) / 2
What is the equation for TST - Answers - (total of all sleep epochs) / 2
What is the equation for SE% - Answers - (TST / TRT) x 100 = SE%
How do you figure sleep stage percentage - Answers - total epochs in sleep stage / TST
x 100
How do you figure REM latency - Answers - REM onset - SO / 2
What is the equation for events - Answers - total # of events / TST x 60
If lights on was at epoch 825 and lights out was at epoch 25, what is your TRT -
Answers - (825-25) / 2 = 400 min
Total wake epochs were 205, what would be your TWT - Answers - = 102.5 min
N1 was 45 epochs, N2 was 380 epochs, N3 was 55 epochs, REM was 115 epochs and
your TRT was 800 epochs, what is your TST - Answers - = 297.5 min
If your TST was 297.5 min and your TRT was 400 min, what is your SE% - Answers -
(297.) x 100 = 74%
SO was at epoch 52 and LO was at epoch 25, what is your sleep latency - Answers -
(52-25) / 2 = 13.5 min
SO was at epoch 52 and REM onset was 272 epochs in to the PSG, what is your REM
latency - Answers - 52 - 272 = 220, = 110 min
N1 sleep lasted for 45 epochs, what is your total time in N1 - Answers - = 22.5
min
N1 sleep lasted for 45 epochs and your TST was 297.5 min in length, what percentage
of time was spent in N1 sleep - Answers - (22..5) x 100 = 7.6 %
N2 sleep lasted 380 epochs, how much time was spent in N2 sleep - Answers -
= 190 min
What is the equation for TRT - Answers - (lights on-lights out) / 2
What is the equation for TWT - Answers - (total wake epochs) / 2
What is the equation for TST - Answers - (total of all sleep epochs) / 2
What is the equation for SE% - Answers - (TST / TRT) x 100 = SE%
How do you figure sleep stage percentage - Answers - total epochs in sleep stage / TST
x 100
How do you figure REM latency - Answers - REM onset - SO / 2
What is the equation for events - Answers - total # of events / TST x 60
If lights on was at epoch 825 and lights out was at epoch 25, what is your TRT -
Answers - (825-25) / 2 = 400 min
Total wake epochs were 205, what would be your TWT - Answers - = 102.5 min
N1 was 45 epochs, N2 was 380 epochs, N3 was 55 epochs, REM was 115 epochs and
your TRT was 800 epochs, what is your TST - Answers - = 297.5 min
If your TST was 297.5 min and your TRT was 400 min, what is your SE% - Answers -
(297.) x 100 = 74%
SO was at epoch 52 and LO was at epoch 25, what is your sleep latency - Answers -
(52-25) / 2 = 13.5 min
SO was at epoch 52 and REM onset was 272 epochs in to the PSG, what is your REM
latency - Answers - 52 - 272 = 220, = 110 min
N1 sleep lasted for 45 epochs, what is your total time in N1 - Answers - = 22.5
min
N1 sleep lasted for 45 epochs and your TST was 297.5 min in length, what percentage
of time was spent in N1 sleep - Answers - (22..5) x 100 = 7.6 %
N2 sleep lasted 380 epochs, how much time was spent in N2 sleep - Answers -
= 190 min
