Abstract
Background/Objective
Intracerebral hemorrhage (ICH) patients commonly have concomitant white matter lesions (WML) which may be associated with poor outcome. We studied if WML affects hematoma expansion (HE) and post-stroke functional outcome in a post hoc analysis of patients from randomized controlled trials.
Methods
In ICH patients from the clinical trials MISTIE II and CLEAR III, WML grade on diagnostic computed tomography (dCT) scan (dCT, < 24 h after ictus) was assessed using the van Swieten scale (vSS, range 0–4). The primary outcome for HE was > 33% or > 6 mL ICH volume increase from dCT to the last pre-randomization CT (< 72 h of dCT). Secondary HE outcomes were: absolute ICH expansion, > 10.4 mL total clot volume increase, and a subgroup analysis including patients with dCT < 6 h after ictus using the primary HE definition of > 33% or > 6 mL ICH volume increase. Poor functional outcome was assessed at 180 days and defined as modified Rankin Scale (mRS) ≥ 4, with ordinal mRS as a secondary endpoint.
Results
Of 635 patients, 55% had WML grade 1–4 at dCT (median 2.2 h from ictus) and 13% had subsequent HE. WML at dCT did not increase the odds for primary or secondary HE endpoints (P ≥ 0.05) after adjustment for ICH volume, intraventricular hemorrhage volume, warfarin/INR > 1.5, ictus to dCT time in hours, age, diabetes mellitus, and thalamic ICH location. WML increased the odds for having poor functional outcome (mRS ≥ 4) in univariate analyses (vSS 4; OR 4.16; 95% CI 2.54–6.83; P < 0.001) which persisted in multivariable analyses after adjustment for HE and other outcome risk factors.
Conclusions
Concomitant WML does not increase the odds for HE in patients with ICH but increases the odds for poor functional outcome.
Clinical Trial Registration
http://www.clinicaltrials.gov trial-identifiers: NCT00224770 and NCT00784134.
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Acknowledgments
Funding
CLEAR III (U01NS062851) and MISTIE II (R01NS046309) were supported by Grants awarded to Dr. Hanley by the National Institutes of Health National Institute of Neurological Disorders and Stroke. Genentech donated alteplase. Dr. Hanley is supported by the National Institutes of Health (U01NS080824 and U24TR001609). Dr. Lindgren is supported by the Swedish Heart and Lung Foundation, Skåne University Hospital; the Freemasons Lodge of Instruction EOS, Lund University; and the Swedish Stroke Association. Dr. Norrving is supported by Stiftelsen Färs and Frosta Sparbank.
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BMH and NU contributed to study conception and design, acquisition of data, analysis and interpretation of data, and drafting and critical revision of the manuscript. JM, RD, RA, and RET contributed to analysis and interpretation of data, and critical revisions to the manuscript. BN, IA, MZ, WCZ, and AL contributed to study conception and design, interpretation of data, and critical revisions to the manuscript. DFH contributed to study conception and design, acquisition of data, analysis and interpretation of data, and critical revision to the manuscript. All authors approved the final version of the manuscript to be published.
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Dr. Hanley reports Grants from NIH/NINDS, non-financial support from Genentech, during the conduct of the study and personal fees from BrainScope, Neurotrope, Op2Lysis, Portola Pharmaceuticals, and medicolegal, outside the submitted work. Dr. Lindgren reports personal fees from Bayer, BMS/Pfizer, Astra Zeneca, Portola, outside the submitted work. Dr. Norrving reports personal fees for DMC work in the Navigate-ESUS trial (Bayer) and in the SOCRATES and THALES trials (Astra Zeneca). The other authors report no conflicts.
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Hansen, B.M., Ullman, N., Muschelli, J. et al. Relationship of White Matter Lesions with Intracerebral Hemorrhage Expansion and Functional Outcome: MISTIE II and CLEAR III. Neurocrit Care 33, 516–524 (2020). https://doi.org/10.1007/s12028-020-00916-4
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DOI: https://doi.org/10.1007/s12028-020-00916-4