Fig. 4.
Comparison of the GPDI parameters to estimates of conventional methods. Scatter plots of the parameter α of the Greco model vs. the Loewe Additivity-based GPDI model parameters INTAB, expressed as % change of the EC50 of drug A (red) and INTBA, expressed as % change of the EC50 of drug B (blue) (a), the parameter β of the empiric Bliss Independence model vs. the Bliss Independence-based GPDI model parameters (b), and α vs. β (c); correlation of the parameters was (r 2) 0.26 (a), 0.24 (b), and 0.59 (c)