Table 1.

Demographic characteristics of the study population.

Variables	Normal	POAG	SOAG	XFG	P value
Patients (n)	88	97	48	48
Number of eyes (n)	88	97	48	48
Sex ratio (male:female)	40:48	52:45	32:16	31:17	NS*
Age (years)
Mean ± SD	72.2 ± 9.7	68.4 ± 11.3	61.0 ± 12.1	75.6 ± 9.9	†< 0.005, ††,††††,†††††,††††††< 0.0001**
[Range]	25–91	34–87	39–87	39–93
IOP (mmHg)
Mean ± SD	12.9 ± 2.5	16.3 ± 5.1	23.4 ± 10.6	24.2 ± 9.4	†,††,†††,††††,†††††< 0.0001**
[Range]	7–20	8–42	7–52	11–48

POAG primary open angle glaucoma, SOAG secondary open angle glaucoma, XFG exfoliation glaucoma, IOP intraocular pressure.

*Fisher's exact test.

**Steel–Dwass test.

^†Statistically significant difference between normal and POAG (Steel–Dwass test).

^††Statistically significant difference between normal and SOAG (Steel–Dwass test).

^†††Statistically significant difference between normal and XFG (Steel–Dwass test).

^††††Statistically significant difference between POAG and SOAG (Steel–Dwass test).

^{†††††}Statistically significant difference between POAG and XFG (Steel–Dwass test).

^{††††††}Statistically significant difference between SOAG and XFG (Steel–Dwass test).