Table 3.

Frequency of spectral domain optical coherence tomography findings in each group

	Group 1	Group 2	Group 3	Overall P value*	P value†	P value‡	P value**
N. of participants	154	59	63
Double layer sign	9.1 %	10.2 %	0.0 %	0.015	0.012	0.011	0.797
Elevation by DLD or soft drusen	16.9 %	37.3 %	1.6 %	<0.001	0.001	<0.001	0.003
Elevation by PED	5.8 %	8.5 %	0.0 %	0.049	0.062	0.024	0.539
Disruption of RPE	4.5 %	8.5 %	1.6 %	0.203
Choroidal thickness, μm	261.4 ± 99.0	178.2 ± 101.0	207.4 ± 77.6	<0.001	<0.001	0.080	<0.001

Group 1: fellow eye of unilateral polypoidal choroidal vasculopathy; Group 2: fellow eye of unilateral typical exudative age-related

macular degeneration; Group 3: fellow eye of unilateral epiretinal membrane, as a control

DLD, drusen-like deposits; PED, pigment epithelial detachment; RPE, retinal pigment epithelium

* comparison of all Groups; P value less than 0.05 is considered significant

^† comparison of Groups 1 and 3; P value less than 0.016 is considered significant

^‡ comparison of Groups 2 and 3; P value less than 0.016 is considered significant

^** comparison of Groups 1 and 2; P value less than 0.016 is considered significant