The Difference in Translaminar Pressure Gradient and Neuroretinal Rim Area in Glaucoma and Healthy Subjects

Table 2

Changes in intraocular pressure, intracranial pressure, translaminar pressure gradient, and optic nerve disc structure.

	NTG group; (𝑁=9); Mean (SD)	HTG group; (𝑁=9); Mean (SD)	Control group; (𝑁=9); Mean (SD)	P level
IOP (mmHg)	13.7 (1.6)	24.7 (6.8)	15.9 (2.1)	<0.001*
ICP (mmHg)	7.4 (2.7)	8.9 (1.9)	10.5 (3.0)	0.06
TPG (mmHg)	6.3 (3.1)	15.7 (7.7)	5.4 (3.3)	<0.001*
Disc area (mm^2)	2.03 (0.5)	1.96 (0.4)	2.1 (0.2)	0.68
NRA (mm^2)	0.97 (0.36)	1.32 (0.67)	1.79 (0.20)	0.003*
Linear cup/disc ratio	0.70 (0.14)	0.52 (0.27)	0.38 (0.08)	0.002*
RNFL thickness (mm)	0.15 (0.07)	0.20 (0.08)	0.28 (0.02)	0.001*

∗Kruskall-Wallis test. Significance level 𝑃<0.05. NTG: normal tension glaucoma; HTG: high tension glaucoma; SD: standard deviation; 𝑁: number; IOP: intraocular pressure; ICP: intracranial pressure; TPG: translaminar pressure gradient; NRA: neuroretinal rim area; RNFL: retinal nerve fiber layer.