Skip to main content

Table 2 Diagnostic performance* of the Leucocyte Esterase Test (LET) after a reading time of 2 min (“LET 2 m”) and 5 min (“LET 5 m”) in the detection of urogenital Chlamydia Trachomatis (Ct) among male patients, Dermatological Service in Paramaribo, Suriname, 2008–2010

From: Leucocyte esterase dip-stick test as a point-of-care diagnostic for urogenital chlamydia in male patients: A multi-center evaluation in two STI outpatient clinics in Paramaribo and Amsterdam

 

N

LET + NAAT+

LET-NAAT+

LET + NAAT-

LET- NAAT-

Sens. (95 % CI)

Spec. (95 % CI)

PPV (95 % CI)

NPV (95 % CI)

Agr.

Kappa

LET 2 m

 ALL

412

87

7

197

121

92.6 % (85.3–97.0)

38.1 % (32.7–43.6)

30.6 % (27.3–36.4)

94.5 % (89.1–97.8)

50.5 %

0.179

 Sympto-matic patients

279

71

6

141

61

92.2 % (83.8–97.1)

30.2 % (24.0–37.0)

33.5 % (27.2–40.3)

91.0 % (81.5–96.6)

47.3 %

0.145

 Asympto-matic patients

133

16

1

56

60

94.1 % (71.3–99.9)

51.7 % (42.3–61.1)

22.2 % (13.8–32.9)

98.4 % (91.2–100)

57.1 %

0.193

 <25 years

109

29

0

47

33

100 % (88.1–100)

41.3 % (30.4–52.8)

38.2 % (27.2–50.0)

100 % (89.4–100)

56.9 %

0.272

LET 5 m

 ALL

412

91

3

265

53

96.8 % (91.0–99.3)

16.7 % (12.7–21.2)

25.6 % (21.1–30.4)

94.6 % (85.1–98.9)

35.0

0.068

  1. *Sensitivity (Sens.), Specificity (Spec.), Positive Predictive Value (PPV), Negative Predictive Value (NPV), Agreement (Agr.) and Kappa