Table 2. Diagnostic values of hyperhomocysteinemia and elevated C-reactive protein (CRP) for ocular ischemic syndrome in patients with a stenosis of internal carotid artery.

Variables (%)	tHcy >14.0 μmol/l	CRP >0.5 mg/l	tHcy >14.0 μmol/l
			+CRP>0.5 mg/l
Sensitivity	70	73	53
Specificity	79	73	86
Positive predictive value	56	50	58
Negative predictive value	80	73	83

Abbreviations: CRP, C-reactive protein; tHcy, total homocysteine.