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 |