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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