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CC BY 4.0 · TH Open 2022; 06(04): e429-e436
DOI: 10.1055/s-0042-1758713
Original Article

Evaluation of Risk Scores as Predictive Tools for Stroke in Patients with Retinal Artery Occlusion: A Danish Nationwide Cohort Study

Marie Ørskov
1   Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
2   Department of Clinical Medicine, Aalborg Thrombosis Research Unit, Faculty of Health, Aalborg University, Aalborg, Denmark
,
Henrik Vorum
3   Department of Ophthalmology, Aalborg University Hospital, Aalborg, Denmark
,
Torben Bjerregaard Larsen
1   Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
2   Department of Clinical Medicine, Aalborg Thrombosis Research Unit, Faculty of Health, Aalborg University, Aalborg, Denmark
,
Flemming Skjøth
2   Department of Clinical Medicine, Aalborg Thrombosis Research Unit, Faculty of Health, Aalborg University, Aalborg, Denmark
4   Unit for Clinical Biostatistics, Aalborg University Hospital, Aalborg, Denmark
› Institutsangaben
Funding This study was partly funded by an unrestricted grant from The Obel Family Foundation and Lions Club Bannerslund. The sponsor did not influence the design or execution of the study.
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Abstract

Purpose We investigated the 1-year risk of stroke in patients with retinal artery occlusion and evaluated the predictive and discriminating abilities of contemporary risk stratification models for embolic stroke.

Methods This register-based cohort study included 7,906 patients with retinal artery occlusion from Danish nationwide patient registries between 1995 and 2018. The study population was stratified according to the number of points obtained in the stroke risk scores: the CHA2DS2-VASc score and the ESSEN Stroke Risk score. The 1-year risk of stroke within strata was evaluated and compared using the cox proportional hazards model. Furthermore, the discrimination of the risk scores as predictive tools for stroke risk assessment was investigated using C-statistics, Brier score, and the index of prediction accuracy.

Results The stroke event rate in patients with retinal artery occlusion increased as the score increased for both risk scores, ranging from 3.62 (95% confidence interval [CI]: 2.46–5.31) per 100 person-years to 13.25 (95% CI: 11.78––14.89) per 100-person-years for increasing levels of the CHA2DS2-VASc score and from 3.97 (95% CI: 2.97–5.32) per 100 person-years to 16.43 (95% CI: 14.01–19.27) per 100 person-years for increasing levels of the ESSEN Stroke Risk score. Using a risk score of 0 as a reference, the difference was statistically significant for retinal artery occlusion patients with a CHA2DS2-VASc score of 2 or above and for all levels of the ESSEN Stroke Risk score. The C-statistics for the risk scores was 61% (95% CI: 58%–63%) and 62% (95% CI: 59–64%) for the CHA2DS2-VASc score and ESSEN Stroke Risk score, respectively.

Conclusion The results suggested that the use of the CHA2DS2-VASc score and the ESSEN Stroke Risk score was applicable for risk stratification of stroke in patients with retinal artery occlusion, but discrimination was poor due to low specificity.

Keywords

Retinal artery occlusion - Prediction - Risk scores - CHA2DS2-VASc score - ESSEN Stroke Risk score

Supplementary Material



Publikationsverlauf

Eingereicht: 08. Juli 2022

Angenommen: 28. September 2022

Artikel online veröffentlicht:
30. November 2022

© 2022. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany

 

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