Correlation of BCL-2 levels with the percentage of leukemic cells in the day 7 bone marrow samples. The BCL-2 expression levels were correlated on a continuous scale with the day 7 bone marrow blast percentage by simple regression. (A) T-lineage ALL subset. The coefficient of correlation (CC) was 0.340, with a P = .013. (B) B-lineage ALL subset. The CC was 0.003, with a P = .960.