Table 3.

Comparison of the differences of the change in sleep variables as a result of blood draw (night 4 minus mean values of nights 2 and 3) in young, healthy men versus women (study III)

	Men (n = 32)	Women (n = 34)	P-value
SL (1st epoch of stage 2, min)	10.84 ± 2.9	3.2 ± 2.8	0.28
%WTASO	9.99 ± 1.4	5.49 ± 1.3	0.12
%ST	−11.76 ± 1.3	−5.72 ± 1.3	<0.01
%Stage 1	2.46 ± 0.3	0.80 ± 0.3	<0.01
%Stage 2	−3.16 ± 1.1	−0.28 ± 1.0	0.28
%SWS	0.11 ± 0.8	0.63 ± 0.8	0.81
%REM	0.64 ± 0.7	−1.22 ± 0.7	0.27
REM latency (min)	−12.42 ± 5.0	−6.42 ± 4.9	0.81

Data represent mean ± SEM.

SL, sleep latency; WTASO, wake time after sleep onset; ST, sleep time; SWS, slow wave sleep; REM, rapid eye movement.