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Table 6 Pyrogenic cut-off, sensitivity and specificity estimates by using attributable fraction (sensibility = number of malaria episodes ≥ cut-off/total of malaria episodes; specificity = number of no malaria episodes < cut-off/total of no malaria episodes).

From: Malaria infection and disease in an area with pyrethroid-resistant vectors in southern Benin

Cut-off (trophozoites of P. falciparum/μL) N malaria episodes ≥ pyrogenic cut-off N no malaria episodes < pyrogenic cut-off Sensibility (%) Specificity (%)
1 74.4 131.0 100.0 81.1
100 74.2 135.7 99.6 84.0
250 73.3 141.8 98.5 87.8
500 72.4 145.9 97.2 90.3
1000 71.0 149.6 95.4 92.6
1500 70.7 150.2 94.9 93.0
2000 68.9 152.5 92.6 94.4
3000 67.5 154.0 90.6 95.3
3500 65.8 155.3 88.4 96.2
4000 64.0 156.5 86.0 96.9
5000 62.7 157.2 84.2 97.3
7500 59.2 158.8 79.5 98.3
10000 56.8 159.4 76.3 98.6
> = 15000 52.5 160.1 70.5 99.1