Review
Copyright ©The Author(s) 2023.
World J Crit Care Med. Jun 9, 2023; 12(3): 92-115
Published online Jun 9, 2023. doi: 10.5492/wjccm.v12.i3.92
Table 3 Comparison of American Academy of Sleep Medicine’s and Rechtschaffen and Kales criteria sleep stage nomenclature

AASM
R&K
WakeStage WStage W
NREM sleepStage N1Stage 1
Stage N2Stage 2
Stage N3Stage 3
Stage 4
REM sleepStage RStage REM