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. Author manuscript; available in PMC: 2013 Feb 1.
Published in final edited form as: J Sleep Res. 2011 Mar 29;21(1):122–127. doi: 10.1111/j.1365-2869.2011.00917.x

Table 2.

Actigraphy vs. PSG

Variables Means (Minutes) ± Std Deviation Mean Difference ± Std Error (Two-Tailed) (Minutes) Pairwise Correlation
ACT PSG
SLO 24.2 ± 28.0 28.4 ± 36.9 4.19 ± 5.3(NS) 0.31(p<0.05)
LPS 24.2 ± 28.0 35.2 ± 37.6 11.0 ± 4.8(p<0.05) 0.44(p<0.001)
SE 82.7 ± 9.8 80.7 ± 13.4 2.0 ± 1.7(NS) 0.48 (p<0.001)
WASO 61.2 ± 40.2 61.1 ± 52.8 0.1 ± 6.0 (NS) 0.59(p<0.001)
TST 400.4 ± 41.9 387.5 ± 64.5 12.8 ± 7.5(NS) 0.54(p<0.001)