Impact of atrial fibrillation on the development of ischemic stroke among cancer patients classified by CHA 2 DS 2 -VASc score-a nationwide cohort study

Wei-Syun Hu; Cheng-Li Lin

doi:10.18632/oncotarget.24143

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Research Papers:

Impact of atrial fibrillation on the development of ischemic stroke among cancer patients classified by CHA₂DS₂-VASc score-a nationwide cohort study

Wei-Syun Hu _ and Cheng-Li Lin

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Oncotarget. 2018; 9:7623-7630. https://doi.org/10.18632/oncotarget.24143

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Abstract

Wei-Syun Hu1,2 and Cheng-Li Lin3

1School of Medicine, College of Medicine, China Medical University, Taichung 40402, Taiwan

2Division of Cardiovascular Medicine, Department of Medicine, China Medical University Hospital, Taichung 40447, Taiwan

3Management Office for Health Data, China Medical University Hospital, Taichung 40447, Taiwan

Correspondence to:

Wei-Syun Hu, email: [email protected]

Keywords: atrial fibrillation; cancer; CHA₂DS₂-VASc score; ischemic stroke

Received: August 14, 2017 Accepted: January 01, 2018 Published: January 10, 2018

ABSTRACT

Purpose: The current study aimed to explore the impact of atrial fibrillation (AF) on risk of ischemic stroke among cancer patients classified by CHA₂DS₂-VASc score.

Methods: Study participants were identified from Registry for Catastrophic Illness Patient Database. All cancer patients whether they had comorbid AF or not were divided into 4 groups according to their CHA₂DS₂-VASc score-a score of 0–1, 2–3, 4–5 and >5. Competing risk analysis was used to evaluate the subhazard ratios (SHRs) and 95% confidence intervals (CIs) of incident ischemic stroke between cancer patients with and without AF according to their CHA₂DS₂-VASc score.

Results: A total of 781473 patients with cancer were identified. Of them, 21134 had comorbid AF whereas the remaining 760339 patients did not. After controlling for the confounding factors and the competing risk of death, among cancer patients, those with AF were associated with the highest risk of ischemic stroke than those without AF while their CHA₂DS₂-VASc score was 0~1 (adjusted SHR [aSHR] = 4.15, 95% CI = 3.29–5.23). Among those with a CHA₂DS₂-VASc score of >5, the AF group exhibited a 1.82-fold higher risk of ischemic stroke than the non-AF group (95% CI = 1.34–2.47).

Conclusions: The impact of AF on risk of ischemic stroke was attenuated with advancing CHA₂DS₂-VASc score in patients with cancer.

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Research Papers:

Impact of atrial fibrillation on the development of ischemic stroke among cancer patients classified by CHA2DS2-VASc score-a nationwide cohort study

Abstract

Impact of atrial fibrillation on the development of ischemic stroke among cancer patients classified by CHA₂DS₂-VASc score-a nationwide cohort study