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Br J Ophthalmol 84:473-478 doi:10.1136/bjo.84.5.473
  • Original Article
    • Clinical science

Relation of optic disc topography and age to thickness of retinal nerve fibre layer as measured using scanning laser polarimetry, in normal subjects

Table 7

Correlations between optic disc variables and age (x) and temporal quadrant integral of RNFL thickness (y) in 38 normal subjects.

Variable Equation p Value R R2
Age y = 2.8E−04x + 0.111 0.332 −0.162 0.026
Disc area y = 0.011x + 0.072 0.303 0.172 0.029
Average depth y = 0.005x + 0.102 0.952 0.016 0.000
C/D ratio y = 0.031x + 0.087 0.204 0.211 0.044
Contour modulation y = 0.113x + 0.085 0.547 0.157 0.025
Contour variation y = 0.116x + 0.052 0.253 0.293 0.086
½ depth area y = 0.003x + 0.101 0.948 0.017 0.000
½ depth volume y = −0.002x + 0.101 0.994 −0.002 0.000
Effective area y = 0.014x + 0.086 0.103 0.269 0.072
Maximum depth y = −0.024x + 0.085 0.256 −0.189 0.036
Mean contour depth y = −0.033x + 0.099 0.314 −0.168 0.028
NRA y = −0.009x + 0.111 0.382 −0.146 0.021
Volume above y = −0.034x + 0.109 0.209 −0.209 0.043
Volume below y = −0.035x + 0.091 0.165 −0.230 0.053

  • ↵R = correlation coefficient;

  • ↵R2 = determination coefficient;

  • ↵C/D = cup/disc;

  • ↵NRA = neuroretinal rim area.

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