Table 4 Performance metrics for the diagnosis of children with TB, for the three cohorts and for the pooled datasets

From: Diagnosis of paediatric tuberculosis by optically detecting two virulence factors on extracellular vesicles in blood samples

Cohort

Performance metric

Confirmed TB

Unconfirmed TB

Unlikely TB with any criteria

No NIH criteria and non-TB control

NLH (20 children)

Fraction of children

14/15

0/5

Sensitivity, %

93.3 (68.1, 99.8)

Specificity, %

100.0 (47.8, 100.0)

DR (43 children)

Fraction of children

15/17

9/11

1/3

1/12

Sensitivity, %

88.2 (63.6, 98.5)

81.8 (48.2, 97.7)

33.3 (0.8, 90.6)

Specificity, %

66.7 (9.4, 99.2)

91.7 (61.5, 99.8)

PUSH (147 children)

Fraction of children

10/12

48/66

31/57

2/12

Sensitivity, %

83.3 (51.6, 97.9)

72.7 (60.4, 83.0)

54.4 (40.7, 67.6)

Specificity, %

45.6 (32.4, 59.3)

83.3 (51.6, 97.9)

Pooled (210 children)

Fraction of children

39/44

57/77

32/60

3/29

Sensitivity, %

88.6 (75.4, 96.2)

74.0 (62.8, 83.4)

53.3 (40.0, 66.3)

Specificity, %

46.7 (33.7, 60.0)

89.7 (72.6, 97.8)

  1. The fraction of children refers to the fractions that were positive according to Mtb EV. Confidence intervals (95%) for the sensitivities and specificities are given in brackets.