Table 3. Comparison of the threshold points for amodiaquine, chloroquine and mefloquine, when analysing the relationship between assay duration and EC₅₀ in P. vivax.

Drug	Threshold Estimate (c, hrs)	95% Confidence Intervals		P-value
		Lower	Upper
Chloroquine	33.73	28.15	39.31	<0.001
Amodiaquine	31.13	27.84	35.7	0.01
Mefloquine	39.14	32.94	45.34	<0.001