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Table 2 Correlations between malaria transmission markers in 2012 at 0.9 km resolution

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

 

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

     

266

     

Positive blood films

0.2672

1

    

266

292

    

<0.0001

     

Positive PCR tests

0.0328

0.5114

1

   

266

292

292

   

0.5944

<0.0001

    

Anti-AMA1 antibody titres

0.0215

0.2927

0.5413

1

  

41

42

42

43

  

0.8937

0.06

0.0002

   

Anti-MSP1-19 antibody titres

−0.0444

0.3509

0.5745

0.6338

1

 

41

42

42

43

43

 

0.7828

0.0227

0.0001

<0.0001

  

Anopheles mosquitoes captured

0.0929

 

0.0648

−0.2398

−0.0218

1

87

87

87

20

20

90

0.3923

 

0.5513

0.3086

0.9272

 
  1. 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 (rs), the number of grid cells (n) and the p value for rs