Figure 4. Hematoma volumes (ml) and percentage deviations (%) for cerebellar and brainstem hemorrhages calculated by gold standard, formula 1/2ABC and 2/3SH.

(A) the comparison of three methods in hematoma volume was statistically indistinguishable (P>0.05); (B) formula 1/2ABC and 2/3SH underestimated hematoma volume by −10.34(−20.11, 3.10)% and −4.64(18.31, 3.36)% for cerebellar hemorrhage, −13.69(−27.15, 4.78)% and −8.80(−21.74, 13.88)% for brainstem hemorrhage, respectively.