Study on the correlation between insomnia degree and quality of life in psychiatric outpatients in Chifeng city

Table 4 Correlation analysis between the severity of primary insomnia and depression and anxiety

Index		SDS score	SAS score
SDS score	Pearson correlation coefficient	-	R = 0.377, P < 0.001
	Partial correlation coefficient		R = 0.112, P = 0.038
SAS score	Pearson correlation coefficient	R = 0.377, P < 0.001	-
	Partial correlation coefficient	R = 0.112, P = 0.038
PSQI score	Pearson correlation coefficient	R = 0.571, P < 0.001	R = 0.524, P < 0.001
	Partial correlation coefficient	R = 0.473, P < 0.001	R = 0.406, P < 0.001

This table assesses the relationship between insomnia severity Pittsburgh sleep quality index (PSQI score) and depression self-rating depression scale (SDS score) and anxiety self-rating anxiety scale (SAS score) by Pearson correlation analysis (Pearson correlation). The results showed that both SDS scores and SAS scores were significantly and positively correlated with PSQI scores (P < 0.001). SDS: Self-rating depression scale; SAS: Self-rating anxiety scale; PSQI: Pittsburgh sleep quality index.