Correlation between macular edema recurrence and macular capillary network destruction in branch retinal vein occlusion

Table 2 Perifoveal capillary network morphology on en face swept-source optical coherence tomography angiography images

OCT angiography parameters	no ME recurrence group (n = 21)	ME recurrence group (n = 22)	p-value
Superficial capillary plexus
Average FAZ area	0.40 ± 0.11 mm²	0.52 ± 0.26 mm²	0.035^*
Intact perifoveal capillary ring, no. (%)	12 (57.1%)	6 (27.3%)	0.047^†
Extent of the destructed capillary ring, no. (%)
1 clock hour	6 (28.6%)	3 (13.6%)
2 clock hours	3 (14.3%)	5 (22.7%)
3 clock hours	0 (0.0%)	2 (9.1%)
4 clock hours	0 (0.0%)	2 (9.1%)
5 clock hours	0 (0.0%)	0 (0.0%)
6 clock hours	0 (0.0%)	4 (18.2%)
Average extent of capillary ring loss, °	17.3	69.5	0.006^*
Deep capillary plexus
Average FAZ area	0.48 ± 0.12 mm²	0.60 ± 0.26 mm²	0.063^*
Intact perifoveal capillary ring, no. (%)	11 (52.4%)	2 (9.1%)	0.002^†
Extent of the destructed capillary ring, no. (%)
1 clock hour	5 (23.8%)	5 (22.7%)
2 clock hours	2 (9.5%)	2 (9.1%)
3 clock hours	2 (9.5%)	4 (18.2%)
4 clock hours	0 (0.0%)	5 (22.7%)
5 clock hours	0 (0.0%)	1 (4.6%)
6 clock hours	1 (4.8%)	3 (13.6%)
Average extent of capillary ring loss, °	30.0	87.3	0.001^*

Values are presented as mean ± standard deviation unless otherwise indicated
OCT Optical coherence tomography, ME Macular edema, FAZ Foveal avascular zone
* Statistics by Wilcoxon rank-sum test; † Statistics by Chi-square test

ISSN: 1471-2415