Thirty-day survival of allo-HSCT patients diagnosed with ICH according to the LAWS score in the derivation and external validation groups. High risk denotes patients with LAWS scores of 8 to 11, intermediate risk denotes patients with LAWS scores of 5 to 6, and low risk denotes patients with LAWS scores of 0 to 3. (A) Survival curve of the derivation cohort (log-rank test, P < .0001). (B) Survival curve of the derivation cohort (log-rank test, P = .0014).