Table 4.

Comparisons of OCTA metrics between HC and the non-ON eyes of NMOSD participants.

Variable	SVC			DVC			IVC
	Non-ON	HC	P	Non-ON	HC	P	Non-ON	HC	P
FAZ-area (FA)	3.59 (1.31)	3.07 (1.06)	0.194	1.5 (0.55)	1.42 (0.52)	0.500	1.65 (0.55)	1.54 (0.59)	0.523
FAZ-circularity (FC)	0.69 (0.22)	0.71 (0.14)	0.817	0.94 (0.16)	0.99 (0.12)	0.261	0.91 (0.14)	0.92 (0.15)	0.79
FAZ-axial-ratio (FAR)	1.55 (1.10)	1.81 (4.63)	0.866	0.95 (0.18)	1.09 (0.13)	0.002	1.13 (0.17)	1.13 (0.14)	0.835
FAZ-roundness (FR)	32.32 (8.22)	36.06 (9.80)	0.287	45.76 (14.57)	37.67 (4.64)	0.001	36.75 (5.96)	36.15 (4.35)	0.679
FAZ-solidity (FS)	0.84 (0.07)	0.85 (0.06)	0.750	0.93 (0.04)	0.94 (0.04)	0.206	0.91 (0.04)	0.92 (0.05)	0.422
Direction-ratio	0.85 (0.08)	0.83 (0.06)	0.270	0.81 (0.04)	0.80 (0.04)	0.237	0.84 (0.05)	0.83 (0.05)	0.29
Direction-area	112396.77 (38514.02)	126975.41 (35612.57)	0.208	230685.61 (67930.71)	253055.16 (60396.85)	0.238	129787.94 (39670.54)	137133.29 (35682.46)	0.509
Tortuosity	1.89 (0.27)	1.75 (0.28)	0.193	1.58 (0.11)	1.56 (0.18)	0.782	1.85 (0.21)	1.76 (0.30)	0.293
VAD	14.41 (2.82)	15.50 (2.37)	0.221	23.08 (5.35)	24.71 (5.16)	0.305	15.96 (3.15)	16.58 (1.16)	0.484
VLD	5.23 (1.15)	5.71(0.94)	0.182	9.07 (2.07)	9.72 (1.92)	0.266	5.94 (1.25)	6.22 (1.16)	0.426
FD	1.47 (0.04)	1.48 (0.04)	0.308	1.58 (0.04)	1.59 (0.05)	0.520	1.49 (0.05)	1.50(0.04)	0.551
B-num	127.11 (38.81)	142.18 (33.76)	0.233	218.36 (50.47)	240.26 (63.31)	0.238	132.28 (29.76)	146.06 (37.23)	0.208

The data with P value less than 0.05 as bold value, which generally means that the parameters they represent are significant.