Table 2.

Partial correlation between blood pressure parameters and parafoveal retinal microvascular parameters among 256 patients with CKD.

	Parafoveal SVP vessel density		Parafoveal DVP vessel density		Parafoveal SVP flow void area
	Coefficient	P value*	Coefficient	P value*	Coefficient	P value*
SBP at enrollment	− 0.010	0.877	0.045	0.481	− 0.031	0.626
DBP at enrollment	0.038	0.554	0.053	0.402	− 0.100	0.115
Average SBP in 1 year	− 0.120	0.057	− 0.043	0.499	0.130	0.040
Average DBP in 1 year	− 0.013	0.841	0.084	0.185	0.004	0.950
Maximum SBP in 1 year	− 0.186	0.003	− 0.069	0.277	0.210	0.001
Maximum DBP in 1 year	− 0.069	0.277	0.052	0.414	0.068	0.285
Within-patient SD of SBP	− 0.174	0.006	− 0.071	0.265	0.244	< 0.001
Within-patient SD of DBP	− 0.086	0.176	− 0.022	0.724	0.095	0.132
Proportion of high SBP measurement	− 0.107	0.092	− 0.048	0.451	0.161	0.011

Bold values indicate p < 0.05.

CKD: chronic kidney disease; DBP: diastolic blood pressure; DVP: deep vascular plexus; SBP: systolic blood pressure; SD: standard deviation; SVP: superficial vascular plexus.

*p values were calculated by partial correlation after controlling for age, sex, diabetes mellitus, axial length, and intraocular pressure.