Large Relative Surface Area of Hematomas Predict a Poor Outcome in Patients with Spontaneous Intracerebral Hemorrhage

Objective: The aim of this study is to investigate the predictive value of relative surface area of hematoma on poor prognosis of spontaneous intracerebral hemorrhage (sICH). Materials and Methods: We retrospectively analyzed 102 patients with sICH who met the inclusion criteria, attending to Yongchuan Hospital of Chongqing Medical University from January 2019 to September 2020. Cranial CT within 6 h of onset was completed and repeated in 24 h. The volume and surface area of the hematoma are measured by software, and the relative surface area is calculated from the above data. The primary outcome was 90-day modified Rankin Scale (mRS) score, which was classified as good prognosis (<= 2 points) and poor prognosis (>2 points) according to the results. Univariate analysis and binary logistic regression analysis were used to calculate the effect of each variable on poor prognosis. Results: The study is comprised of 52 patients with favorable functional prognosis and 50 patients with unfavorable one. The findings showed that admission National Institutes of Health Stroke Scale(NIHSS), hematoma volume, relative surface area, hematoma expansion(HE) and serum calcium concentration were independent influencing factors for poor prognosis(P=0.004,0.007,0.023,0.001,0.035, respectively). ROC curve analysis revealed that the area under the curve of the relative surface area of the hematoma predicted poor prognosis was 0.894(95% CI 0.830-0.985, P <0.001), which was better than the rest of the variables. Conclusions: The relative surface area of hematoma in sICH is an independent risk factor for poor prognosis with a high predictive value, and large relative surface area suggests poor prognosis.