Table 4.

Summary of differences of OCTA measurements and risk of publication bias using Egger's test.

	Overall effect		Heterogeneity		Egger's test	Overall effect		Heterogeneity		Egger's test	Overall effect		Heterogeneity		Egger's test
	SMD	p -value	I 2	Q (P)		SMD	p -value	I 2	Q (P)		SMD	p -value	I 2	Q (P)
	AD vs. Controls					MCI vs. Controls					AD vs. MCI
FAZ	0.54 [0.09, 0.99]	0.02	84.1%	<0.001	0.0002	0.27 [−0.03, 0.57]	0.08	58.2%	0.04	0.848	−0.07 [−0.32, 0.18]	0.59	0.0%	0.69	0.651
Choroidal thickness	−0.58 [−1.26, 0.10]	0.09	88.4%	<0.001	0.436	-	-	-	-	-	-	-	-	-	-
SCP vessel density
Mean	−0.48 [−0.70, −0.27]	<0.001	48.2%	0.04	0.227	−0.42 [−0.81, −0.03]	0.03	79.3%	<0.001	0.705	−0.29 [−0.64, 0.07]	0.12	59.3%	0.04	0.145
Fovea	−0.38 [−0.66, −0.10]	0.01	36.6%	0.19	0.025	−0.36 [−0.65, −0.07]	0.02	20.7%	0.26	0.573	0.04 [−0.61, 0.68]	0.91	75.5%	0.04	-
Parafovea	−0.48 [−0.71, −0.25]	<0.001	41.6%	0.10	0.217	−0.37 [−0.95, 0.21]	0.21	83.1%	<0.001	0.528	−0.31 [−0.82, 0.20]	0.23	74.4%	0.01	0.119
DCP vessel density	−1.19 [−2.00, −0.38]	<0.001	92.4%	<0.001	0.002	−0.53 [−0.85, −0.22]	<0.001	59.7%	0.02	0.968	−0.68 [−1.37, 0.01]	0.05	84.1%	<0.001	0.206
Peripapillary vessel density	−0.17 [−0.66, 0.31]	0.49	70.5%	0.04	0.221	−0.43 [−0.73, −0.14]	<0.001	0.0%	0.53	0.268	-	-	-	-	-
Choroidal perfusion density	−0.01 [−0.22, 0.20]	0.91	0.0%	0.73	0.719	−0.27 [−0.80, 0.26]	0.31	61.3%	0.11	–	0.24 [−0.29, 0.77]	0.37	48.2%	0.16	–

SCP, Superficial capillary plexus; DCP, Deep capillary plexus; FAZ, Foveal avascular zone.