Outer Retinal Layers’ Thickness Changes in relation to Age and Choroidal Thickness in Normal Eyes

Table 2

Comparison of mean thickness (in μm) of 9 ETDRS subfields for RPE-OS, ONL-IS, and choroid in the 3 studied groups.

	Group 1 (mean ± SD)	Group 2 (mean ± SD)	Group 3 (mean ± SD)		G1 vs G2	G1 vs G3	G2 vs G3
RPE-OS
Central RPE-OS	74.76 ± 3.0	74.63 ± 3.33	71.05 ± 4.81	<0.001	0.87	<0.001	<0.001
Inner ring
Superior	67.62 ± 2.71	68.05 ± 3.28	65.19 ± 3.65	<0.001	0.54	0.001	<0.001
Inferior	67.73 ± 3.28	68.07 ± 3.48	64.84 ± 3.33	<0.001	0.64	<0.001	<0.001
Nasal	67.98 ± 2.77	67.56 ± 4.45	64.78 ± 4.11	<0.001	0.61	<0.001	0.002
Temporal	68.16 ± 2.99	68.98 ± 3.61	65.32 ± 3.57	<0.001	0.26	<0.001	<0.001
Outer ring
Superior	65.04 ± 2.20	65.79 ± 3.44	62.46 ± 3.35	<0.001	0.25	<0.001	<0.001
Inferior	64.44 ± 2.34	64.256 ± 2.84	61.0 ± 3.46	<0.001	0.76	<0.001	<0.001
Nasal	64.91 ± 2.60	63.69 ± 4.46	61.24 ± 2.96	<0.001	0.10	<0.001	0.002
Temporal	64.60 ± 1.95	64.72 ± 3.62	61.54 ± 3.70	<0.001	0.86	<0.001	<0.001
ONL-IS
Central ONL-IS	83.98 ± 10.3	84.00 ± 24.57	88.16 ± 11.51	0.45	0.99	0.27	0.27
Inner ring
Superior	69.69 ± 7.44	71.86 ± 8.68	69.29 ± 8.88	0.321	0.223	0.83	0.17
Inferior	69.16 ± 8.89	70.69 ± 9.218	71.51 ± 9.58	0.497	0.434	0.25	0.69
Nasal	70.62 ± 10.48	73.09 ± 10.88	68.57 ± 10.12	0.160	0.273	0.38	0.06
Temporal	69.38 ± 8.73	70.58 ± 8.79	75.00 ± 9.05	0.014	0.525	0.005	0.03
Outer ring
Superior	61.13 ± 7.55	62.26 ± 8.46	61.621 ± 8.795	0.816	0.525	0.790	0.732
Inferior	57.18 ± 7.37	58.86 ± 8.55	59.540 ± 8.102	0.383	0.327	0.186	0.706
Nasal	58.53 ± 6.74	59.26 ± 9.53	58.757 ± 10.712	0.930	0.708	0.911	0.806
Temporal	60.51 ± 8.29	62.23 ± 8.77	64.324 ± 8.913	0.143	0.352	0.049	0.283
CT
Central CT	356.16 ± 59.88	296.21 ± 41.26	255.14 ± 33.61	<0.001	<0.001	<0.001	<0.001
Inner ring
Superior	352.69 ± 56.17	291.442 ± 32.22	257.49 ± 33.04	<0.001	<0.001	<0.001	0.001
Inferior	345.73 ± 63.77	279.48 ± 32.06	254.97 ± 35.44	<0.001	<0.001	<0.001	0.021
Nasal	316.73 ± 50.67	263.14 ± 32.13	231.03 ± 33.68	<0.001	<0.001	<0.001	0.001
Temporal	338.80 ± 54.55	280.51 ± 35.21	243.70 ± 32.05	<0.001	<0.001	<0.001	<0.001
Outer ring
Superior	338.07 ± 52.29	276.05 ± 28.84	244.86 ± 36.59	<0.001	<0.001	<0.001	0.001
Inferior	324.16 ± 61.13	258.49 ± 33.55	229.46 ± 51.99	<0.001	<0.001	<0.001	0.011
Nasal	273.18 ± 46.56	235.49 ± 36.32	207.73 ± 35.19	<0.001	<0.001	<0.001	0.002
Temporal	322.47 ± 52.19	261.88 ± 39.01	229.19 ± 31.94	<0.001	<0.001	<0.001	0.001

CT: choroidal thickness. Bold numbers refer to statistically significant values.