Table 2. Simple linear regression between age and retinal layer thickness of the central, inner and outer circle for the study population of 297 subjects.

		Mean (+/- SD) (μm)	R	Loss μm*year (SE)	p
Retina	Central circle	278.20 (+/- 21.13)	-0.03	-0.034 (0.070)	0.664
	Inner circle	338.38 (+/- 17.70)	-0.32	-0.250 (0.43)	<0.001
	Outer circle	294.64 (+/- 13.05)	-0.32	-0.225 (0.038)	<0.001
mRNFL	Central circle	12.71 (+/- 2.29)	0.24	0.008 (0.007)	0,301
	Inner circle	22.65 (+/- 2.27)	-0.06	-0.007 (0.007)	0.333
	Outer circle	37.90 (+/- 5.34)	-0.01	-0.004 (0.017)	0.806
GCL	Central circle	17.63 (+/- 5.03)	-0.28	-0.056 (0.016)	<0.001
	Inner circle	48.35 (+/- 5.81)	-0.19	-0.058 (0.018)	0.001
	Outer circle	33.44 (+/- 4,03)	-0.08	-0.016 (0.013)	0.195
IPL	Central circle	22.05 (+/- 3.67)	-0.28	-0.011 (0.012)	0.362
	Inner circle	41.31 (+/- 3.39)	-0.38	-0.069 (0.010)	<0.001
	Outer circle	28.64 (+/- 2.54)	-0.25	-0.034 (0.008)	<0.001
INL	Central circle	20.52 (+/- 5.05)	0.37	0.060 (0.015)	<0.001
	Inner circle	39.23 (+/- 3.20)	0.00	8.59 e^-0.005	0.993
	Outer circle	32.05 (+/- 2.25)	-0.28	-0.034 (0.007)	<0.001
OPL	Central circle	26.38 (+/- 5.50)	0.18	0.004 (0.018)	0.817
	Inner circle	35.18 (+/- 4.46)	0.09	0.022 (0.014)	0.109
	Outer circle	27.94 (+/- 2.18)	0.15	0.018 (0.007)	0.008
ONL	Central circle	92.71 (+/- 10.14)	0.17	0.017 (0.033)	0.598
	Inner circle	68.41 (+/- 8.08)	-0.14	-0.061 (0.025)	0.015
	Outer circle	54.93 (+/- 6.16)	-0.35	-0.114 (0.018)	<0.001
PR	Central circle	88.12 (+/- 4.30)	-0.30	-0.073 (0.013)	<0.001
	Inner circle	80.98 (+/- 2.73)	-0.13	-0.019 (0.008)	0.022
	Outer circle	78.12 (+/- 2.37)	-0.12	-0.015 (0.007)	0.039
RPE	Central circle	16.90 (+/- 2.16)	0.15	-0.015 (0.007)	0.033
	Inner circle	15.23 (+/- 1.49)	0.10	0.008 (0.005)	0.097
	Outer circle	13.41 (+/- 1.21)	0.09	0.005 (0.003)	0.135