Table 3.

Comparison of demographic features and of subfoveal choroidal thickness in diabetic patients with different grades of diabetic retinopathy

	R1 (n = 16)	R2 (n = 29)	P value	R3 (n = 19)	P value (vs R1)	P value (vs R2)	R4 (n = 36)	P value (vs R1)	P value (vs R2)	P value (vs R3)
Age	62.88 ± 6.05	65.24 ± 6.98	0.27	61.74 ± 7.05	0.61	0.11	59.47 ± 8.20	0.15	< 0.01*	0.33
Sex (M:F)	0:16	4:21	0.09	8:11	< 0.01*	0.05	11:18	< 0.01*	0.07	0.77
Duration of diabetes (years ± SD)	7.75 ± 3.13	15.10 ± 4.88	< 0.01*	13.53 ± 4.86	< 0.01	0.30	16.14 ± 6.42	< 0.01*	0.51	< 0.01*
SFCT (µm ± SD)	314.06 ± 14.41	303.03 ± 19.74	0.06	294.47 ± 15.65	< 0.01*	0.03*	284.56 ± 21.09	< 0.01*	< 0.01*	0.08

R1 mild non-proliferative diabetic retinopathy, R2 moderate non-proliferative diabetic retinopathy, R3 severe non-proliferative diabetic retinopathy, R4 proliferative diabetic retinopathy, SD standard deviation, SFCT subfoveal choroidal thickness

*Statistically significant