Table 1.

Sleep parameter.

Total sleep duration [min]	% WASO	% N1	% N2	% SWS	% REM
181.84 ± 8.55	5.54 ± 2.76	4.75 ± 0.83	48.41 ± 2.71	31.99 ± 2.54	8.64 ± 1.54

N1, N2: NREM sleep stages N1 & N2, SWS: slow-wave sleep (N3), REM: rapid eye movement sleep, WASO: wake after sleep onset. Values are means ± SEM.