Table 3.

Comparison of perfusion area parameters between each group

	Control group	No-DR	Mild-Moderate NPDR	P	1 vs 2	1 vs 3	2 vs 3
Central ring	0.15(0.08,0.19)	0.15(0.11,0.20)	0.15(0.10,0.19)	0.953	0.864	0.974	1
3 mm radius
Superior	0.79(0.68,0.85)	0.68(0.49,0.77)	0.65(0.61,0.79)	0.023	0.024	0.013	0.606
Inferior	0.76(0.63,0.85)	0.66(0.49,0.79)	0.66(0.49,0.79)	0.029	0.049	0.046	0.867
Temporal	0.76(0.60,0.84)	0.65(0.57,0.79)	0.67(0.50,0.75)	0.099	0.166	0.260	0.408
Nasal	0.73(0.63,0.78)	0.65(0.48,0.75)	0.61(0.53,0.72)	0.026	0.047	0.045	0.911
6 mm radius
Superior	2.89(2.45,3.19)	2.56(2.15,3.00)	2.73(2.21,2.98)	0.108	0.420	0.098	0.709
Inferior	2.82(2.45,3.01)	2.59(2.24,3.01)	2.70(2.13,2.96)	0.153	0.093	0.073	0.876
Temporal	2.79(2.34,3.10)	2.65(2.19,3.10)	2.61(2.11,2.87)	0.221	0.585	0.086	0.220
Nasal	2.89(2.59,3.25)	2.75(2.36,3.24)	2.76(2.48,3.19)	0.595	0.327	0.511	0.660
9 mm radius
Superior	4.64(3.99,5.15)	4.37(3.73,4.98)	4.52(4.02,4.82)	0.393	0.205	0.416	0.455
Inferior	4.38(3.76.5.08)	4.42(3.91,4.96)	4.52(3.96,4.83)	0.974	0.856	0.813	0.969
Temporal	4.21(3.51,4.66)	4.07(3.53,4.55)	4.08(3.39,4.45)	0.445	0.549	0.195	0.455
Nasal	4.94(4.54,5.37)	4.91(4.28,5.60)	5.06(4.51,5.72)	0.603	0.742	0.381	0.416
12 mm radius
Superior	5.89(4.98,6.48)	5.48(4.80,6.31)	5.66(4.87,6.13)	0.667	0.429	0.411	0.902
Inferior	4.77(4.03,5.60)	4.61(3.87,5.14)	5.01(4.38,5.46)	0.086	0.220	0.552	0.028
Temporal	4.92(3.83,5.52)	4.52(3.75,5.41)	4.69(3.64,5.35)	0.828	0.585	0.581	0.924
Nasal	5.75(4.95,6.16)	5.41(4.71,6.19)	5.86(5.16,6.53)	0.068	0.425	0.107	0.032
0-12 mm radius	53.86(46.69,58.81)	51.90(46.87,55.99)	51.86(48.83,56.57)	0.422	0.358	0.487	0.507