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Posters

An enlightening hypothesis of a blinding disease – a population based study on the seasonality and incidence of central retinal vein occlusion

Poster Details

First Author: D.Epstein SWEDEN

Co Author(s):    A. Kvanta   P. Lindqvist               0   0 0   0 0   0 0   0 0

Abstract Details



Purpose:

To investigate seasonality in the onset and incidence of central retinal vein occlusion (CRVO) in Stockholm Sweden.

Setting:

St. Erik Eye Hospital Stockholm Sweden

Methods:

Retrospective consecutive population based case series of patients presenting to the emergency department with CRVO from January 2008 through December 2011. Date, age at occurrence and gender was recorded in the study cohort. Using the hospitals database the month of disease presentation was recorded in patients with CRVO (ICD-10 code H34.8a).

Results:

469 patients presented with CRVO during the study period. The peak CRVO incidence occurred during the winter-spring period and was significantly higher than during the summer-autumn period. The number of patients presenting in the different seasons were 115 (31.7% CI 95% 26.9─36.5) in winter, 109 (30.0% CI 95% 25.3─34.7) in spring, 76 (20.9% CI 95% 16.7─25.1) in summer and 63 (17.3% CI 95% 13.5─21.3) in autumn (p < 0.0001). There were more males accounting for 55.1 % (200/363) of the subjects (p=0.046). The mean yearly incidence of CRVO was 2/10000 for persons aged over 40 years, increasing from 0.25/10000 at 45 years to 7/10000 at age 85 (p < 0.001).

Conclusions:

The incidence of CRVO in Stockholm, Sweden, has a significant seasonal pattern and most cases occur during the winter-spring period. The highest incidence of CRVO was found in elderly people.

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