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Table 3 Proportion of children with continued false-positive (FP) RDTs, stratified by day-0 parasite density

From: Paracheck-Pf® accuracy and recently treated Plasmodium falciparum infections: is there a risk of over-diagnosis?

Parasite density
(× 103), Day 0
Day 7 % FP
(95% CI)
Day 14 % FP
(95% CI)
Day 21 % FP
(95% CI)
Day 28 % FP
(95% CI)
Day 35 % FP*
(95% CI)
50–200 (n = 30) 100 100 100 100 77.3 (17/22)
  - - - - (54.6–92.2)
20–50 (n = 42) 100 100 97.6 (41/42) 97.6 (41/42) 79.2 (19/24)
  - - (87.4–99.9) (87.4–99.9) (57.8–92.9)
10–20 (n = 22) 100 100 100 90.9 (20/22) 71.4 (10/14)
  - - - (70.9–98.9) (46.2–95.0)
2–10 (n = 18) 94.4 (17/18) 88.9 (16/18) 72.2 (13/18) 66.7 (12/18) 50.0 (4/8)
  (72.7–99.9) (65.3–98.6) (46.5–90.3) (41.0–86.7) (15.7–84.3)
Total 99.1 (111/112) 98.2 (110/112) 94.6 (106/112) 92.0 (103/112) 73.5 (50/68)
  (95.1–100) (93.7–99.8) (88.7–98.0) (85.3–96.3) (61.4–83.5)
  1. *44 children were not able to complete a day-28 clinic visit after forced evacuation of the study team due to political insecurity in the region.