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Table 4 Comparison between the control group and study groups as regards pRNFL and optic disc parameters using independent sample t-test

From: Structural changes of the macula and optic nerve head in the remaining eyes after enucleation for retinoblastoma: an optical coherence tomography study

 

Control group

Study group (I)

Study Group (II)

P-value

P-value

P-value

Mean (μm) ± SD

H. Peripapillary retinal nerve fiber layer (RNFL) thickness

Average

105.29 ± 6.64

114.58 ± 7.76

101.28 ± 12.22

0.002

0.43

0.05

Superior

134.64 ± 16.12

152.58 ± 12.0

140.43 ± 19.16

0.0005

0.39

0.04

Nasal

84.64 ± 14.40

84.25 ± 12.24

85.57 ± 24.71

0.93

0.93

0.89

Temporal

65.83 ± 12.31

74.83 ± 7.90

68.57 ± 14.08

0.008

0.73

0.03

Inferior

132.61 ± 16.19

148.83 ± 15.98

125.57 ± 24.09

0.007

0.48

0.05

I. Optic disc parameters

    

Horizontal C/D ratio

0.37 ± 0.25

0.47 ± 0.12

0.45 ± 0.12

0.09

0.22

0.76

Vertical C/D ratio

0.35 ± 0.23

0.43 ± 0.11

0.41 ± 0.09

0.15

0.36

0.59

Disc area (mm2)

2.13 ± 0.52

2.06 ± 0.33

2.28 ± 0.33

0.63

0.34

0.19

Cup area (mm2)

0.48 ± 0.46

0.37 ± 0.42a

0.45 ± 0.17

0.93b

0.75

0.7b

  1. SD, standard deviation; μm, micron; C/D, cup disc ratio; mm, millimeter
  2. aMedian ± Interquartile range;bComparison by Mann Whitney U test