Table 3.

Crude and adjusted correlations between subjective sleep quality and biomarkers

	PSQI
	all	caregivers	controls	p
IL-61	0.05	0.05	−0.05	0.602
	0.04	0.05	−0.07	0.511
CRP2	−0.02	−0.03	−0.03	0.979
	−0.09	−0.07	−0.09	0.909
D-dimer3	0.22∗∗	0.12	0.36∗	0.167
	0.20∗	0.08	0.33∗	0.157
VWF4	0.19∗	0.29∗∗	0.06	0.176
	0.19∗	0.27∗	0.06	0.220

All analyses were adjusted for age, exercise and role overload. The columns show the bivariate (upper row) and adjusted (lower row) correlation coefficients with significance level for all participants, caregivers and controls, and the p value for the comparison of the strength of the correlation coefficients between caregivers and controls.

^∗p < 0.05,

^∗∗p < 0.01.

¹Additionally adjusted for BMI, angiotensin-converting enzyme inhibitor use and smoking.

²Additionally adjusted for gender, BMI and smoking.

³Additionally adjusted for hypertension.

⁴Additionally adjusted for BMI and hypercholesterolemia.