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Table 3 Child-level analyses of Mtb stool assay in 259 children

From: Detection of Mycobacterium tuberculosis in pediatric stool samples using TruTip technology

  

Positive stool result (n/N)

Sensitivity (95% CIa)

Specificity (95% CI)

First sample

All children

16/259

  

Confirmed TB (SM+)b

7/7

100% (59–100%)

 

Confirmed TB (SM-)

5/15

33% (13–61%)

 

Confirmed TB (all smear grades)

12/22

55% (33–75%)

 

Clinically-diagnosed, unconfirmed TB

1/84

1.2% (0.0–6.5%)

 

No TB diagnosis

3/153

 

98% (94–99.5%)

Both samples

All children

18/259

  

Confirmed TB (SM+)

7/7

100% (59–100%)

 

Confirmed TB (SM-)

6/15

40% (16–68%)

 

Confirmed TB (all smear grades)

13/22

59% (36–79%)

 

Clinically-diagnosed, unconfirmed TB

1/84

1.2% (0.0–6.5%)

 

No TB diagnosis

4/153

 

97% (93–99.3%)

  1. aCI confidence interval, bSM smear