Malaria hotspots defined by clinical malaria, asymptomatic carriage, PCR and vector numbers in a low transmission area on the Kenyan Coast

Table 3 Correlations between malaria transmission markers in 2013 at 0.9 km resolution

	Clinical malaria cases	Positive blood films	Positive PCR tests	Anti-AMA1 antibody titres	Anti-MSP1-19 antibody titres	Anopheles mosquitoes captured
Clinical malaria cases	1
Clinical malaria cases	266
Positive blood films	−0.0165	1
	266	292
	0.7884
Positive PCR tests	0.057	0.3295	1
	266	292	292
	0.3544	<0.0001
Anti-AMA1 antibody titres	−0.0339	0.0516	0.002	1
	22	22	22	22
	0.8808	0.8196	0.9931
Anti-MSP1-19 antibody titres	−0.2376	0.0172	−0.0773	−0.0627	1
	22	22	22	22	22
	0.2869	0.9394	0.7323	0.7817
Anopheles mosquitoes captured	0.1693	−0.0343	0.116	0.1943	0.583	1
	87	87	87	12	12	90
	0.1169	0.7527	0.2846	0.5451	0.0467

All markers are expressed as average per cell of a 0.9 km resolution grid superimposed on the study area. Positive blood films, positive PCR tests and Anopheles mosquitoes captured are expressed as mean/grid cell. Antibody titres are expressed as weighted geometric mean/grid cell. Clinical malaria cases are expressed as weighted mean/grid cell. For each pair of markers the table reports from top to bottom the correlation coefficient (r_s), the number of grid cells (n) and the p value for r_s

ISSN: 1475-2875