Table 1.

Characteristics of study participants enrolled in the in vivo drug efficacy study in the North Atlantic Autonomous Region, Nicaragua 2005–2006^*

Variable	CQ arm, n = 30	SP arm, n = 28
Median age, years (range)	16 (8–23)	8 (6–12)
Males (%)	53.3	46.4
Fever at admission, axillary temperature > 37.5°C (%)	66.7	78.3
Geometric mean parasite density at day 0, (parasites/μL)	3,336.2	6,183.2
Mean time to clear parasitemia, days	2.8	2.6

^*CQ = chloroquine; SP = sulfadoxine-pyrimethamine. No early or late treatment failures were observed. Parasitemias did not develop in any of the participants during the follow-up period.