Table 1. Demographic features of study subjects.

Variables	RVO	Disease controls (ICA stenosis)		OIS
		<90% Stenosis	>90% Stenosis
No. of patients	87	955	116	43
Age, years (range)	60 (34–81)	68 (48–93)	70 (45–93)	71 (53–85)
Gender (female/male)	53/34	315/640	26/90	9/34
Smoking (%)	22 (25)	287 (30)	36 (31)	14 (33)
Hypertension (%)	35 (40)	401 (42)	76 (65)	25 (63)
Diabetes (%)	13 (15)	191 (20)	38 (36)	18 (42)

Abbreviations: ICA, internal carotid artery; OIS, ocular ischemic syndrome; RVO, retinal vein occlusion.