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Table 1. 

Mean (Standard Deviation) of Sleep Features for the Three Drug Conditions


PBO
Sodium Oxybate
ZOL
One-way ANOVA
TST (minutes) 91.5 (21.1) 91.1 (15.1) 92.8 (8.1) F(2, 52) = 0.08 
p = .91 
SL (minutes) 9.75 (8.3) 9.61 (5.8) 10.59 (7.3) F(2, 52) = 0.33 
p = .71 
SE 77.49 (20.2) 79.17 (14.6) 79.82 (11.3) F(2, 52) = 0.21 
p = .81 
WASO 18.36 (23.7) 14.74 (15.3) 13.84 (16.8) F(2, 52) = 0.56 
p = .56 
Stage 1 sleep (minutes) 8.51 (5.0) 5.82 (2.7) 8.29 (5.4) F(2, 52) = 4.34 
p = .02 
Stage 2 sleep (minutes) 43.83 (13.9) 40.50 (15.2) 38.88 (16.1) F(2, 52) = 0.77 
p = .46 
SWS (minutes) 8.66 (7.6) 18.47 (16.8) 23.14 (17.3) F(2, 52) = 9.28 
p < .001 
REM sleep (minutes) 30.51 (13.6) 26.28 (14.8) 22.48 (14.7) F(2, 52) = 2.86 
p = .052 
Spindle density 2.67 (1.58) 1.93 (1.24) 3.23 (1.38) F(2, 54) = 13.18 
p < .001 

PBO
Sodium Oxybate
ZOL
One-way ANOVA
TST (minutes) 91.5 (21.1) 91.1 (15.1) 92.8 (8.1) F(2, 52) = 0.08 
p = .91 
SL (minutes) 9.75 (8.3) 9.61 (5.8) 10.59 (7.3) F(2, 52) = 0.33 
p = .71 
SE 77.49 (20.2) 79.17 (14.6) 79.82 (11.3) F(2, 52) = 0.21 
p = .81 
WASO 18.36 (23.7) 14.74 (15.3) 13.84 (16.8) F(2, 52) = 0.56 
p = .56 
Stage 1 sleep (minutes) 8.51 (5.0) 5.82 (2.7) 8.29 (5.4) F(2, 52) = 4.34 
p = .02 
Stage 2 sleep (minutes) 43.83 (13.9) 40.50 (15.2) 38.88 (16.1) F(2, 52) = 0.77 
p = .46 
SWS (minutes) 8.66 (7.6) 18.47 (16.8) 23.14 (17.3) F(2, 52) = 9.28 
p < .001 
REM sleep (minutes) 30.51 (13.6) 26.28 (14.8) 22.48 (14.7) F(2, 52) = 2.86 
p = .052 
Spindle density 2.67 (1.58) 1.93 (1.24) 3.23 (1.38) F(2, 54) = 13.18 
p < .001 

The p-values are from the one-way ANOVA. Significant drug interaction effects were investigated using a priori t tests between drug (SO and ZOL) and PBO.

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