Table 2.

Comparison of ONH Characteristics in Three Myopic Groups

ONH Parameters	Group1	Group2	Group3	P Value
Mean C/D	0.47 ± 0.16	0.45 ± 0.16	0.45 ± 0.15	0.702
Cup area (mm2)	0.60 ± 0.43	0.63 ± 0.46*	0.80 ± 0.73†	<0.05
Cup volume (mm3)	0.54 ± 0.56	0.56 ± 0.59	0.58 ± 0.55	0.885
Optic disc area (mm2)	2.32 ± 0.42‡	2.61 ± 0.47*	3.21 ± 1.48†	<0.001
RIM area (mm2)	1.72 ± 0.30‡	1.99 ± 0.35*	2.41 ± 1.02†	<0.001
Vertical C/D	0.41 ± 0.15	0.40 ± 0.19	0.40 ± 0.14	0.786
Optic disc tilt				<0.05
Tilted disc	50‡	65	77†
Disc without tilt	54‡	36	38†
Tilt ratio	1.35 ± 0.18	1.39 ± 0.20	1.44 ± 0.23†	<0.05
Optic disc rotation
Superior/inferior	44/58	53/44	62/52	0.169
Significant/insignificant	21/84	21/77	25/91	0.953
Rotation degree	9.17° ± 7.43°	10.78° ± 9.10°	11.57° ± 11.11°	0.169
ONH Unchange/change, if unchange, below (%)
BMOD (µm)	1640.69 ± 198.04‡	1818.41 ± 250.12*	2056.52 ± 468.59†	<0.001
BL (µm)	277.84 ± 176.64‡	394.22 ± 196.49*	596.16 ± 318.26†	<0.001
BTA	44.15° ± 26.66°	43.16° ± 18.25°	39.91° ± 16.20°	0.293
Focal LC defect presence/absence	83/22	73/25*	65/53†	<0.001
β-PPA Area
Presence/absence	90/15	88/9	105/13	0.524
Area of β-PPA(mm2)	0.30 ± 0.24‡	0.45 ± 0.30*	0.59 ± 0.49†	<0.001
γ-PPA Area
Presence/absence	76/29‡	91/6*	116/2†	<0.001
Area of γ-PPA Area(mm2)	0.39 ± 0.30‡	0.62 ± 0.28	1.05 ± 1.07†	<0.001
MvD
Presence/absence, no(%)	7/98	16/82*	50/68†	<0.001
Nonjuxtapapillary/juxtapapillary	5/2	10/5*	40/9†	<0.001

BTA, border tissue angle.

^* Significant differences between group 2 and group 3.

^†Significant differences between group 1 and group 3.

^‡Significant differences between group 1 and group 2.