Table 4 Diagnostic performance of RDT, and microscopy in reference to PCR as gold standard

True positive

156

118

109

84

35

30

False negative

280

318

226

251

43

48

False positive

40

0

27

1

17

3

True negative

16,929

16,969

17,043

17,069

17,310

17,324

Sensitivity (95%CI)

35.8 (31.3–40.5)

27.1 (22.9–31.5)

32.5 (27.5–37.8)

25.1 (20.5–30.1)

44.9 (33.6–56.6)

38.5 (27.7–50.2)

Specificity (95%CI)

99.8 (99.7–99.8)

100 (100–100)

99.8 (99.8–99.9)

100 (100–100)

99.9 (99.8–99.9)

100 (99.9–100)

PPV (95%CI)

79.6 (73.3–85.0)

100 (96.9–100)

80.1 (72.4–86.5)

98.8 (93.6–100)

67.3 (52.9–79.7)

90.9 (75.7–98.1)

NPV (95%CI)

98.4 (98.2–98.6)

98.2 (97.9–98.4)

98.7 (98.5–98.9)

98.6 (98.4–98.7)

99.8 (99.7 -99.8)

99.7 (99.6–99.8)