Table 3: Performance of laboratory personnel to correctly identify and quantify malaria slides, Tigray, North Ethiopia, 2016.

Participant reader Expert reader Sensitivity Specificity PPV NPV Agreement Kappa
PosNeg

Species identification
P. falciparum ( = 92)Pos52256.5%95.7%98.7%26.8%76%0.61
Neg4044
Total9246

P. vivax ( = 92)Pos58263.0%95.7%98.9%30. 1%79%0.62
Neg3444
Total9246

Mixed infection ( = 46)Pos10221.7%95.7%96.8%16.9%59%0.52
Neg3644
Total4646

Parasitemia grading
Pf ++++ (high density) ( = 46)Pos42____52%0.49
Neg4244
Total4646

Pf + (low density) ( = 46)Pos22____50%0.48
Neg4444
Total4646