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Table 5 Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (PNV) of the presumptive diagnosis "dengue" in pre-intervention/intervention period in the 4 trial arms

From: Randomised primary health center based interventions to improve the diagnosis and treatment of undifferentiated fever and dengue in Vietnam

 

Training

RDTs

Training + RDTs

Control

 

Pre-intervention

Intervention

Pre-intervention

Intervention

Pre-intervention

Intervention

Pre-intervention

Intervention

Acute dengue among AUF patients (%)

27.3

18.6

18.8

15.0

28.6

21.4

20.5

12.5

Sensitivity (%)

23.1

0.0

3.2

3.3

12.1

30.0

0.0

0.0

95% CI

0.2 - 46.0

-

0 - 9.4

0 - 9.8

3.7 - 20.5

1.6 - 58.4

-

-

Specificity (%)

96.2

96.5

93.4

93.5

93.7

90.4

97.1

96.4

95% CI

90.9 - 100

92.6 - 100

89.2 - 97.6

90.3 - 96.8

89.9 - 97.5

85.2 - 95.6

91.4 - 100

92.4 - 100

PPV (%)

60.0

0

10.0

6.7

41.2

20.0

0

0

95% CI

17.1 - 100

-

0 - 28.6

0 - 19.3

17.8 - 64.6

0 - 40.2

-

-

NPV (%)

83.3

83.0

80.9

87.5

74.4

94.2

84.6

87.9

95% CI

73.9 - 92.8

75.6 - 90.4

74.7 - 87.0

83.2 - 91.8

68.3 - 80.4

90.0 - 98.4

73.3 - 95.9

81.2 - 94.6