ABO Blood Types Are Not Associated with Recurrence After the Surgical Treatment of Chronic Subdural Hematoma-A Retrospective Cohort Study.

J Clin Med · 2026 · PMC13026642 · PMID 41899303

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did not reach statistical significanceno p-value reported

While type AB showed a numerically higher recurrence rate, the confidence interval was exceptionally wide due to the small sample size (n = 19), and this difference did not reach statistical significance.

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