Figure 2: Prevalence of submicroscopic malaria in pregnancy, by study, 1998–2019.
The pooled estimate was obtained using metaprop combining individual patient data and aggregated data, using information during pregnancy. Studies in Asia and the Pacific were included under Asia and studies in central or South America were included under the Americas. G1=primigravidae. G2=secundigravidae. G3+=multigravidae. PfPR2–10=Plasmodium falciparum prevalence among children aged 2–10 years at the year of study visit, as estimated by the Malaria Atlas Project. *Enrolment criteria could have affected parasite prevalence (appendix p 28).