Correlation between kinetic parameters characterizing the molecular response of individual patients with respect to BCR-ABL transcript levels. (A) Steep first (α) and moderate second (β) declines of BCR-ABL transcript levels are uncorrelated (correlation coefficient ρ₁ = −0.131), that is, the second decline cannot be estimated from the first decline. (B) Second decline (ie, long-term response) and breakpoint separating first and second decline are uncorrelated (correlation coefficient ρ₂ = 0.156). Variables α and β are log-transformed.