Table 3

Effect of disc size on optic disc variables

Variable	Equation	p Value	R
Contour variation	y = 0.348+0.009x	0.630	0.045
Mean contour depth	y = 0.033−0.017x	0.251	−0.114
Cup shape	y = −0.019−0.015x	0.008	−0.259
Effective area	y = −0.329+0.572x	0.001	0.736
1/2 depth area	y = −0.232+0.267x	0.001	0.603
C/D ratio^†	y = 0.288−0.058x	0.007	−0.263
NRRA^‡	y = 0.330+0.428x	0.001	0.632
Volume above	y = 0.024+0.081x	0.001	0.525
Volume below	y = 0.049−0124x	0.001	−0.448
1/2 depth volume	y = 0.014−0.027x	0.001	−0.381
Average depth	y = −0.202−0.007x	0.618	−0.045
Maximum depth	y = −0.575+0.016x	0.657	0.045
Average slope	y = 27.073+1.667x	0.141	0.145
Maximum slope	y = 77.431+0.010x	0.991	0.000