. Author manuscript; available in PMC: 2017 Mar 1.

Published in final edited form as: Sleep Breath. 2016 Jan 25;20(1):293–301. doi: 10.1007/s11325-016-1313-4

Table 5.

Spearman’s Rank-Order Correlation coefficients for scores of the Pittsburgh Sleep Quality Index (PSQI) and other measures (N=1,488)

Measures	PSQI during pregnancy
	PSQI global score		PSQI global score excluding component 7
	Unadjusted	Adjusted^*	Unadjusted	Adjusted^*
PHQ-9 (Depression)	0.478	0.478	0.467	0.468
DASS-21 Total Score	0.420	0.421	0.415	0.416
DASS-21 Anxiety	0.292	0.294	0.290	0.292
DASS-21 Depression	0.377	0.378	0.372	0.373
DASS-21 Stress	0.366	0.367	0.361	0.362

Adjusted for maternal age

Abbreviations: PHQ-9, Patient Health Questionnaire 9-Item; DASS-21, Depression, Anxiety, and Stress Scale-21 Item

All correlations are statistically significant with P-value <0.0001.