Difference in log IC
s obtained from the the aldolase ELISA and the [3H]hypoxanthine method. Bland-Altman plot of the difference in log IC50s in nM (or ng/ml for the standard compounds) for 34 anti-malarial compounds, determined by ELISA and [3H]hypoxanthine assay plotted against their mean. The mean difference is -0.261. The limits of agreement are represented by ± 2SD (-0.85 to 0.32).