The SBP at admission is ≥180 mmHg; mean of all SBP measurements within the first 24 hours after admitted was ≥160 mmHg; the interval between symptom onset and admitted to hospital within 6 hours, platelet count being as low as ≤150 x103 / mm3, AST ≥40 UI / L and the appearance of hemorrhagic mass having an irregular margin at baseline CT scan were associated with the hematoma growth in putaminal hemorrhage in the acute phase.