Table 1. Clinical characteristics of the study population.

Parameters	Controls	Cases with POAG	P value
	(n=182)	(n=179)
Age (years)a	51.3±11.2	53.2±8.4	0.0694
Gender
Male (n, %)	93 (51.1)	91 (50.8)	0.9605
Female (n, %)	89 (48.9)	88 (49.2)
IOP (mmHg)a	13.3±3.4	28.6±6.2	<0.0001

^aData are mean±SD. POAG, primary open-angle glaucoma; IOP, intraocular pressure.