TABLE 1.

Correlation of in vitro antimalarial activities^a

Drug 1	Drug 2	Correlation coefficient (r2)	P
LM	CO	−0.26	0.02
LM	PQ	0.19	0.05
LM	DHA	0.40	<0.0001
PQ	CQ	0.16	0.13
PQ	DHA	0.04	0.69
DHA	CQ	0.14	0.16

^aAll pairwise correlations of drug activity were estimated using log-transformed IC₅₀s. Significant associations are shown in boldface.