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Table 6 Comparison of the retinal nerve fiber layer, global asymmetry, macular thickness map, S-I hemisphere asymmetry measurements, and macular thickness measurements between transfusion-dependent β-thalassemia patients with and without diabetes mellitus

From: Optical coherence tomography findings in patients with transfusion-dependent β-thalassemia

Groups

Variables (μm)

DMa (n=13)

No DM (n=26)

P-value

Mean ± SD

Mean ± SD

 

Average RNFL

101.69 ± 15.76

101.96 ± 8.09

0.944

Superior RNFL

125.76 ± 24.17

120.69 ± 24.23

0.541

Inferior RNFL

136.92 ± 28.75

138.30 ± 16.40

0.849

Temporal RNFL

73 ± 13.99

72.03 ± 12.19

0.826

Nasal RNFL

71.07 ± 17.29

76.88 ± 14.58

0.277

Global asymmetry

0.692 ± 4.80

Median, range: 2 (-7-6)

-1.077 ± 4.95

Median, range:-0.5 (-18-9)

0.295

Macular thickness map

293.46 ± 16.40

293.65 ± 13.89

0.967

S-I Asymmetryb

7.69 ± 18.29

Median, range: 2 (0-68)

5.30 ± 9.85

Median, range: 4 (0-52)

0.598

Macular center

244.53 ± 25.46

250.61 ± 21.58

0.440

Primacula superior

325.23 ± 28.78

331.84 ± 22.47

0.435

Primacula inferior

324.30 ± 29.03

328.84 ± 22.06

0.589

Primacula temporal

313.00 ± 24.32

315.84 ± 17.95

0.681

Primacula nasal

327.23 ± 26.42

328.96 ± 21.84

0.829

  1. The Student t-test was used for all comparisons between the two groups, except for global asymmetry and hemisphere S-I which Mann-Whitney test was used.
  2. aDM Diabetes mellitus
  3. bThe absolute difference of RNFL thickness between superior and inferior hemisphere