Table 2.

Mixed model univariate analysis of capillary perfusion index

Factor	Estimates	p Value
Grade of retinopathy
None–mild NPDR	Reference
Moderate–severe NPDR	−2.271	0.096
PDR	−4.200	0.005*
Age	−0.063	0.206
Male	0.046	0.972
logMAR BCVA	−5.177	0.154
HgbA1c	−0.336	0.370
Type 2 DM	−1.844	0.149
Hypertension	−0.973	0.417
Hyperlipidaemia	−1.576	0.188
ETDRS zone
Central foveal	Reference
Inner inferior	34.725	<0.001*
Inner nasal	34.484	<0.001*
Inner superior	34.583	<0.001*
Inner temporal	34.418	<0.001*
Outer inferior	38.506	<0.001*
Outer nasal	37.550	<0.001*
Outer superior	38.479	<0.001*
Outer temporal	38.224	<0.001*

^*p Values <0.05.

BCVA, best-corrected visual acuity; DM, diabetes mellitus; HbA1c, haemoglobin A1c; logMAR, logarithm of the minimum angle of resolution; NPDR, non-proliferative diabetic retinopathy; PDR, proliferative diabetic retinopathy.