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Table 1 Demographic, clinical, OCT, topographic and color doppler parameter levels (Mean ± SE) of four groups

From: Resistive index of ophthalmic artery correlates with retinal pigment epithelial alterations on spectral domain optical coherence tomography in diabetic retinopathy

Variable

Controls

(n = 24) (%)

NO DR

(n = 24) (%)

NPDR

(n = 27) (%)

PDR

(n = 24) (%)

F/χ2

value

p value

Age (years)

60.23 ± 1.34

58.68 ± 1.54

58.28 ± 2.32

63.41 ± 1.99

1.64

0.183

Sex

Female

8 (36.4)

9 (40.9)

7 (28.0)

5 (22.7)

2.035

0.562

Male

14 (63.6)

13 (59.1)

18 (72.0)

17 (77.3)

  

HbA1c (%)

5.35 ± 0.11

7.91 ± 0.19

8.42 ± 0.28

8.88 ± 0.18

55.83

< 0.001

BCVA

0.09 ±  0.03

0.33 ± 0.14

0.74 ± 0.07

1.19 ± 0.02

105.74

< 0.001

(log MAR)

(0.07–0.11)

(0.20–0.48)

(0.65–0.79)

(1.16–1.20)

  

EZ

Disruption absent

22 (100.0)

21 (95.5)

14 (56.0)

0 (0.0)

60.59

< 0.001

Disruption present

0 (0.0)

1 (4.5)

11 (44.0)

22 (100.0)

  

RPE

Disruption absent

22 (100.0)

22 (100.0)

20 (80.0)

0 (0.0)

71.83

< 0.001

Disruption present

0 (0.0)

0 (0.0)

5 (20.0)

22 (100.0)

  

RI-OA

0.61 ± 0.01

0.79 ± 0.01

0.81 ± 0.02

1.02 ± 0.09

14.23

< 0.001

  1. NO DR no diabetic retinopathy, NPDR non proliferative diabetic retinopathy, PDR proliferative diabetic retinopathy, BCVA best corrected visual acuity, HBA1c glycosylated haemoglobin, EZ ellipsoid zone, RPE retinal pigment epithelium, RI-OA resistive index of ophthalmic artery