Figure 4.

Risk of postoperative intracerebral hemorrhage. According to conditional inference trees, size of the lesion was associated with bleeding complication (node 1, P = 0.01). The small lesions (3 cm and less in diameter) were 78% of postoperative bleeding (node 2) while lesion larger than 3 cm without intraoperative bleeding have complication of about 2.4 (node 4). Lesions larger than 3 cm, with intraoperative bleeding, were observed in 42.9%. Intraoperative bleeding was a statistically significant indicator to predict postoperative complications (node 5, P < 0.001)