Table 1.

Comparison of parameters analysed from optical coherence tomography angiography images.

	Single group (G1)	Denoising group (G2)	Averaging group (G3)	P-values among the 3 groups	P-value of pairwise comparisons
					G1 vs G2	G1 vs G3	G2 vs G3
VD, %	33.4 ± 8.3	29.7 ± 9.3	26.0 ± 12.1	<0.001*	<0.001*	<0.001*	0.004*
VLD, %	11.9 ± 2.9	9.0 ± 3.0	7.7 ± 3.8	<0.001*	<0.001*	<0.001*	0.03*
VDI	31.7 ± 5.1	37.6 ± 6.7	40.2 ± 9.9	0.001*	<0.001*	0.002*	0.66
FD	1.5 ± 0.1	1.4 ± 0.1	1.3 ± 0.3	<0.001*	<0.001*	0.004*	0.61
CNR	1.2 ± 0.3	1.7 ± 0.4	1.5 ± 0.3	<0.001*	<0.001*	<0.001*	0.03*
CNV diagnostic scores	0.8 ± 0.6	1.3 ± 0.6	1.6 ± 0.4	<0.001*	0.008*	<0.001*	0.12

Data are presented as the mean ± the standard deviation.

VD = vessel density; VLD = vessel length density; VDI = vessel diameter index; FD = fractal dimension; CNR = contrast-to-noise ratio; CNV = choroidal neovascularization.

Statistical comparisons were conducted among the three groups using an analysis of variance with repeated measures; subsequent pairwise comparisons were conducted with a Bonferroni test.

*Statistically significant P < 0.05.