Relationship between sleep disturbances and depressive symptoms in patients after general anesthesia: A retrospective case-control study

Table 7 Correlation results between sleep disturbances and depression symptoms of patients

Variable	PSQI score	HAMD score	Age	BMI	Systolic blood pressure (mmHg)	Diastolic blood pressure (mmHg)	Heart rate (beats/minute)	CRP (mg/L)
PSQI score	1
HAMD score	0.62a	1
Age	0.18	0.15	1
BMI	0.12	0.1	0.35h	1
Systolic blood pressure	0.24b	0.22b	0.01	0.08	1
Diastolic blood pressure	0.2	0.21e	0.12	0.1	0.74i	1
Heart rate	0.28c	0.30f	-0.07	0.13	0.40j	0.47l	1
CRP	0.32d	0.36g	0.1	0.08	0.27k	0.33m	0.38n	1

^aP < 0.01 [Pittsburgh Sleep Quality Index (PSQI) score was positively correlated with Hamilton Depression Rating Scale (HAMD) score].

^bP < 0.05 (PSQI score was positively correlated with systolic blood pressure).

^cP < 0.05 (PSQI score was positively correlated with heart rate).

^dP < 0.01 [PSQI score was positively correlated with C-reactive protein (CRP)].

^eP < 0.05 (HAMD score was positively correlated with diastolic blood pressure).

^fP < 0.01 (HAMD score was positively correlated with heart rate).

^gP < 0.01 (HAMD score was positively correlated with CRP).

^hP < 0.01 (Age was positively correlated with body mass index).

ⁱP < 0.01 (Systolic blood pressure was positively correlated with diastolic blood pressure).

^jP < 0.01 (Heart rate was positively correlated with systolic blood pressure).

^kP < 0.05 (CRP was positively correlated with systolic blood pressure).

^lP < 0.01 (Heart rate was positively correlated with diastolic blood pressure).

^mP < 0.01 (CRP was positively correlated with diastolic blood pressure).

ⁿP < 0.01 (CRP was positively correlated with heart rate).

Correlation matrix between sleep disturbances and depression symptoms. Systolic blood pressure. Correlation coefficients calculated using Spearman's rho for non-normally distributed variables (CRP, tumor necrosis factor-α). CRP: C-reactive protein; PSQI: Pittsburgh Sleep Quality Index; HAMD: Hamilton Depression Rating Scale; BMI: Body mass index.