The prevalence of histopathologically confirmed placental malaria was significantly higher in
the sulfadoxine–pyrimethamine group (50.0%) than in the three-dose dihydroartemisinin–
piperaquine group (34.1%, P=0.03) or the monthly dihydroartemisinin–piperaquine group
(27.1%, P=0.001). The prevalence of a composite adverse birth outcome was lower in the
monthly dihydroartemisinin–piperaquine group (9.2%) than in the sulfadoxine–pyrimethamine
group (18.6%, P=0.05) or the three-dose dihydroartemisinin–piperaquine group (21.3%,
P=0.02). During pregnancy, the incidence of symptomatic malaria was significantly higher in
the sulfadoxine–pyrimethamine group (41 episodes over 43.0 person-years at risk) than in the
three-dose dihydroartemisinin–piperaquine group (12 episodes over 38.2 person-years at risk,
P=0.001) or the monthly dihydroartemisinin–piperaquine group (0 episodes over 42.3 personyears
at risk, P