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Meta-Analysis
. 2021 Jan;42(1):61-71.
doi: 10.1007/s10072-020-04797-5. Epub 2020 Oct 10.

Cumulative risk of stroke recurrence over the last 10 years: a systematic review and meta-analysis

Beilei Lin  1   2 , Zhenxiang Zhang  3 , Yongxia Mei  1 , Chongjian Wang  4 , Hui Xu  1 , Lamei Liu  1 , Wenna Wang  1
Affiliations
Meta-Analysis

Cumulative risk of stroke recurrence over the last 10 years: a systematic review and meta-analysis

Beilei Lin et al. Neurol Sci. 2021 Jan.

Abstract

Background: Stroke is still the main cause of death and disability worldwide, numerous studies of recurrence risk have been reported, while systematic estimates of stroke recurrence risk in the last 10 years are variable. This review aims to estimate the cumulative stroke recurrence risk in the last 10 years for secondary prevention management in future.

Methods: A systematic search from January 2009 to March 2019 was conducted through PubMed, EMBASE, Web of Science, Wan-fang, and CNKI. Search terms were in English and Chinese.

Results: A total of 37 studies involving 1,075,014 stroke patients were included. The pooled stroke recurrence rate was 7.7% at 3 months, 9.5% at 6 months, 10.4% at 1 year, 16.1% at 2 years, 16.7% at 3 years, 14.8% at 5 years, 12.9% at 10 years, and 39.7% at 12 years after the initial stroke. In addition, the pooled recurrence rate of 32 studies including stroke patients over 50 years only at seven time points except for subgroup of 10 years was 7.7%, 9.5%, 11.2%, 16.1%, 19.3%, 18.1%, and 39.7%, respectively. Meta-regression showed that the time points explained 23.02% of the variance among studies, while regions, age, and stroke types showed no significant contribution to heterogeneity.

Conclusions: The risk of stroke recurrence varies greatly from 3 months to over 10 years and increases significantly over time in both young and old subgroup. The heterogeneity may be explained by follow-up time, regions, age, methodology differences, and stroke types, which was needed further exploration in future.

Keywords: Cumulative recurrence risk; Meta-analysis; Stroke; Systematic review.

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