Risk Factors in Normal-Tension Glaucoma and High-Tension Glaucoma in relation to Polymorphisms of Endothelin-1 Gene and Endothelin-1 Receptor Type A Gene

Table 9

Relation between glaucoma risk factors and polymorphic variants in NTG patients.

NTG
Patients (%)	K198N			C1222T			C70G			G231A
	GG	TT	GT	CC	TT	CT	CC	GG	CG	GG	AA	GA
Haemorrhages	21.2% (21)	16.7% (1)	15% (6)	18% (9)	9.1% (2)	22.3% (16)	15.4% (4)	20.5% (8)	30% (15)	23% (17)	0% (0)	15.6% (10)
Notches	20% (1)	49.5% (48)	64.1% (25)	49% (24)	54.5% (12)	54.2% (38)	48% (12)	51.3% (19)	54.4% (43)	52.1% (38)	50% (3)	53.3% (33)
Low blood pressure	59.1% (13)	100% (1)	90% (9)	58.3% (7)	60% (3)	81.3% (13)	57.4% (4)	58.3% (7)	85.7% (12)	68.8% (11)	0% (0)	75% (12)
Cold extremities	67.9% (19)	100% (1)	83.3% (10)	62.5% (10)	71.4% (5)	83.3% (15)	66.7% (6)	62.5% (10)	87.5% (14)	71.4% (15)	0% (0)	78.9% (15)
Migraine	32.6% (14)	100% (1)	53.8% (7)	33.3% (7)	44.4% (4)	40.7% (11)	50% (6)	29.4% (5)	39.3% (11)	32.3% (10)	50% (1)	45.8% (11)