BMC Psychiatry

Table 6 Correlation coefficients between the WASO and REM/SWS/stage 1/stage 2, for the total of the night, 1st/3rd and 3rd/3 thirds of the night

From: Similar polysomnographic pattern in primary insomnia and major depression with objective insomnia: a sign of common pathophysiology?

Group insomnia							Group depression
Total night		1^st third			3^rd third		Total night		1^st third			3^rd third
	% WASO		% WASO	REML		% WASO		% WASO		% WASO	REML		% WASO
% REM	−0.500	% REM	−0.497	−0.397	% REM	−0.607	% REM	−0.577	%REM	−0.631	−0.468	% REM	−0.594
% SWS	−0.396	%SWS	−0.370	/	% SWS	−0.335	% SWS	−0.297	% SWS	−0.447	/	% SWS	−0.377
% stage 2	−0.511	% stage 2	−0.669	/	% stage 2	−0.657	% stage 2	−0.506	% stage 2	−0.726	/	% stage 2	−0.683
% stage1	NS	% stage1	NS	/	% stage 1	NS	% stage 1	NS	% stage 1	−0.310	/	% stage 1	NS

All correlations were significant at p < 0.005
REM Rapid eye movement sleep, SWS slow-wave sleep, WASO wake after sleep onset

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