Table 4.
Proportion (%) of prozone for Paracheck-Pf according to different denominators, 95% binomial confidence intervals (CI) within brackets
| Category | Number | % of patients suspected of malaria | % of P. falciparum positive patients | % of samples with high parasitaemia |
|---|---|---|---|---|
| Patients suspected of malaria (1 sample per patient included) |
7,543 | 100 | ||
| Samples positive for P. falciparum | 873 | 11.6 (10.86-12.32) |
100 | |
| Samples scored as 4+ or 5 + (MoH semi-quantitative scale) | 410 | 5.4 (4.93-5.97) |
47.0 (43.61-50.34) |
|
| Samples with a high parasitaemia (parasite density ≥ 4%) | 92 | 1.2 (0.98-14.9) |
10,5 (8,58-12,77) |
100 |
| Number of samples available for prozone testing | 76 | - | - | - |
| Negative, faint or weak HRP-2 test lines * | 29 | 0.5 † (0.32-0.64) |
4.0 † (2.81-5.53) |
38.0 † (28.12-48.76) |
| Negative or faint HRP-2 test lines * | 8 | 0.1 † (0.06-0.24) |
1.2 † (0.55-2.10) |
10.9 † (5.34-19.08) |
| Negative HRP-2 test lines * | 3 | 0.05 † (0.01-0.14) |
0.5 † (0.12-1.17) |
4.4 † (1.20-10.76) |
* Line intensity for undiluted samples
† Proportions calculated according to Table 2, corrected for the number of samples that were not available for prozone testing (n = 16).