Fig. 4
From: Testing and treatment for malaria elimination: a systematic review
Relative difference in number of cases by RACD using RDT/ microscopy + passive case detection (PCD) versus PCD alone. Summary estimates are reported by transmission strata and generated using a random effects model. Relative Ratio only takes into consideration PCD cases which lead to RACD, which, in most studies, were all PCD activities. This measure may be lower than if PCD activities that did not lead to RACD were also included, such as in Larsen et al. where PCD leading to RACD was reported as 1848, whereas the total number of PCD identified cases was 53,463