Retinal microcirculation changes in prediabetic patients with short-term increased blood glucose using optical coherence tomography angiography

Table 2 Correlations between blood glucose levels and optical coherence tomography angiography indicators in the superficial retinal layer of the three groups

Index	Fasting		After OGTT
	Coefficient	P value	Coefficient	P value
Central VD	0.264	0.064	-0.145	0.314
Lateral VD	0.093	0.520	0.020	0.891
Full VD	0.148	0.306	-0.038	0.793
Central PD	0.286	0.044	-0.137	0.344
Lateral PD	0.127	0.379	0.038	0.792
Full PD	0.231	0.106	-0.016	0.915
FAZ area	-0.190	0.187	0.147	0.308
FAZ perimeter	-0.216	0.131	0.162	0.261
FAZ circularity	0.049	0.734	-0.079	0.5861

¹Correlations between blood glucose level and optical coherence tomography angiography metrics via Spearman’s correlation analysis; the others were evaluated via Pearson’s correlation analysis.

OGTT: Oral glucose tolerance test; VD: Vessel density; PD: Perfusion density; FAZ: Foveal avascular zone.