Prehospital information and spot sign are complementary predictors of post-admission outcomes of intracerebral hematoma

•Prehospital information (PI) consists of neurological deterioration (ND), GCS, SBP.•PI relates to hematoma volume and outcomes at discharge.•No PI predict presence of spot sign or hematoma growth.•PI and spot sign are complementary predictors of post-admission outcomes. Prehospital information of patients with intracerebral hematomas (ICHs), including systolic blood pressure (SBP), Glasgow Coma Scale (GCS), and neurological deterioration (ND), defined as GCS score worsening ≥2 points, has been reported, though relationships among the prehospital information and clinical factors, including the spot sign, which was a reported predictor of outcomes, were not clarified. The purpose of this study was to elucidate relationships among prehospital information, the spot sign, and clinical outcomes after admission using multivariate analysis. Consecutive patients with ICHs admitted within 6 h of onset from 2009 to 2017 were investigated. Among 645 eligible patients, prehospital ND was found in 107 (16.6%). Multiple regression analysis showed that predictors of hematoma volume were prehospital GCS (p