FYB1 and Alzheimer disease: The AD and ADACP groups had a significantly more delayed REM onset (p<0.001 and p=0.007, respectively) and a shorter REM stage (p=0.001 and p=.0.009, respectively) compared to C. The ADAP group had a better SE (p=0.003) and a shorter WASO (p=0.001) compared to controls.