Analysis of prothrombotic and vascular risk factors in patients with nonarteritic anterior ischemic optic neuropathy.
OBJECTIVE
To determine whether genetic or acquired thrombophilias and other risk factors are associated with nonarteritic anterior ischemic optic neuropathy (NAION).


METHODS
Retrospective case-control study.


METHODS
Sixty-one patients with NAION diagnosed between 1984 and 1997. Ninety consecutive patients who visited the Eye Institute made up the control group.


METHODS
Protein C, protein S, antithrombin III, lupus anticoagulant, and three recently described prothrombotic polymorphisms (i.e., factor V G1691A, factor II G20210A, and methylenetetrahydrofolate reductase [MTHFR] C677T) were analyzed. In addition, risk factors for arteriosclerotic vascular disease were assessed.


METHODS
Parameters of thrombophilia.


RESULTS
None of the thrombophilic markers (genetic and acquired) constituted a significant risk factor for NAION. Ischemic heart disease, hypercholesterolemia, and diabetes mellitus were discerned as risk factors for NAION with odds ratios of 2.9 (95% confidence interval [CI], 1.3-6.4), 2.6 (95% CI, 1.2-5.5), and 2.3 (95% CI, 1.1-4.8), respectively. Multiple logistic regression analysis indicated that ischemic heart disease and hypercholesterolemia exerted an additive risk for NAION with a combined odds ratio of 4.5 (95% CI, 1.4-14.5). However, none of these risk factors statistically predicted second eye involvement.


CONCLUSIONS
NAION was not found to be associated with thrombophilic risk factors, yet it was related to ischemic heart disease, hypercholesterolemia, and diabetes mellitus.
Salomon
O
O
Institute of Thrombosis and Hemostasis, Department of Hematology, Sheba Medical Center, Tel Hashomer, Israel.
Huna-Baron
R
R
Kurtz
S
S
Steinberg
D M
DM
Moisseiev
J
J
Rosenberg
N
N
Yassur
I
I
Vidne
O
O
Zivelin
A
A
Gitel
S
S
Davidson
J
J
Ravid
B
B
Seligsohn
U
U
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001167:Arteritis; D015415:Biomarkers; D016022:Case-Control Studies; D048909:Diabetes Complications; D005260:Female; D006801:Humans; D006937:Hypercholesterolemia / Q000150:complications*; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000150:complications*; D016017:Odds Ratio; D009898:Optic Disk / Q000098:blood supply; D018917:Optic Neuropathy, Ischemic / Q000097:blood / Q000209:etiology*; D011516:Prothrombin / Q000032:analysis*; D012189:Retrospective Studies; D012307:Risk Factors; D019851:Thrombophilia / Q000097:blood / Q000150:complications
D015415:Biomarkers; D011516:Prothrombin