Abstract
Research on variables associated with chronic subdural hematoma (cSDH) resolution following middle meningeal artery embolization (MMAE) is limited. This study investigated the clinical utility of age-adjusted Charlson Comorbidity Index (ACCI) and modified 5-item Frailty Index (mFI-5) for predicting cSDH resolution following MMAE. We identified patients who underwent MMAE at our institution between January 2018, and December 2022, with at least 20 days of follow-up and one radiographic follow-up study. Patient demographics, characteristics, and outcomes were collected. Complete resolution was defined as absence of subdural collections on CT-scan at last follow-up. Non-age adjusted CCI (CCI), ACCI, and mFI-5 scores were calculated. Univariate and multivariable logistic regression analyzed the relationship between cSDH resolution and variables. A receiver operating characteristic (ROC) curve established the utility of ACCI and mFI-5 in predicting hematoma resolution. The study included 85 MMAE procedures. In univariate analysis, patients without resolution were older, had higher CCI, higher ACCI, higher mFI-5, and were more likely to have diabetes mellitus. In multivarible analysis, CCI (OR: 0.66, 95% CI: 0.48, 0.91) was independently associated with resolution controlling for age and antithrombotic resumption. The area under the ROC (AUROC) curve was 0.75 (95% CI: 0.65 - 0.85) for ACCI and 0.64 (95% CI: 0.52 - 0.76) for mFI-5. The optimal cutoffs for predicting resolution were ACCI ≥ 5 (sensitivity = 0.63, specificity = 0.77), and mFI-5 > 0 (sensitivity = 0.84, specificity = 0.43). ACCI and mFI-5 moderately predict MMAE resolution and may aid in medical decision-making.
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