Abstract
We investigated the effects of individual and cumulative cerebral small vessel disease (SVD) markers on long-term clinical outcomes in spontaneous intracerebral hemorrhage (sICH) patients. This prospective, single-center cohort study was conducted from 2012 to 2019. SVD markers, including lacunae, cerebral microbleeds, white matter hyperintensity (WMH), and perivascular spaces in the basal ganglia, were assessed to calculate a summary SVD score. Patients were categorized into severe (score ≥3) and non-severe (score 0–2) SVD burden groups. Functional prognosis was defined as recovery, no change, or decline based on modified Rankin Scale changes at 2 years after discharge, excluding death. Associations of SVD burden and individual SVD markers with outcomes were evaluated using Cox proportional hazards modeling for recurrent stroke and all-cause mortality, and using ordinal logistic regression for functional prognosis. Among 155 sICH patients who underwent MRI, 98 showed severe SVD burden. Recurrent stroke and all-cause mortality rates were 2.2 and 8.3 per 100 patient-years, respectively, over a median 2.1-year follow-up. In terms of functional prognosis, 57 patients (51.8%) recovered, 32 (29.1%) showed no change, and 21 (19.1%) declined. A significant association was apparent between severe SVD burden and poorer functional prognosis (odds ratio [OR] 2.48, 95% confidence interval [CI] 1.04–6.04; p = 0.042), particularly with moderate-to-severe WMH (OR 2.54, 95%CI 1.02–6.54; p = 0.048). The cumulative effects of SVD markers inhibited long-term functional recovery in sICH patients. Severe SVD burden, as well as moderate-to-severe WMH, can be indicators of long-term prognosis after sICH.

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Data availability
Analyses for the HAGAKURE study are on-going; however, once completed, the data generated from this work will be available upon reasonable request.
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Acknowledgements
We are indebted to Dr. Kiku Uwatoko, Dr. Hirome Minagawa, Kazuhiro Kawamoto, Yoko Wakabayashi, and Miki Fujii for data management.
Funding
The HAGAKURE was organized by a central coordinating center located at Saga University Hospital and an associated center at Kansai Medical University, with funding support by a Grant-in-Aid for Scientific Research (C), JSPS KAKENHI (grant nos. 15K10364 and 21K10510).
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Study conception: SI, YY, JT, and HH. Data acquisition: SI, YY, JT, ME, SO, MK, KS, MM, CS, TI, YN, NO, MY, and YK. Analysis and interpretation of data: SI, YY, JT, MN, and AO. Drafting the manuscript: SI, YY, and HH. Supervision of the study: YY, HI, TA, HK, and HH.
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Ikeda, S., Yakushiji, Y., Tanaka, J. et al. Cerebral small vessel disease markers and long-term prognosis in spontaneous intracerebral hemorrhage: the HAGAKURE-ICH study. Hypertens Res 48, 233–243 (2025). https://doi.org/10.1038/s41440-024-01906-1
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DOI: https://doi.org/10.1038/s41440-024-01906-1
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