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Table 2 Ultrasound findings in relation to evidence of TB

From: Clinical and ultrasonographic features of abdominal tuberculosis in HIV positive adults in Zambia

Finding

TB positive

TB negative

PPV

NPV

n = 31

22

9

  

Ascites

16

6

73%

33%

Ascites with fibrinous stranding

12

2

86%

41%

Intra-abdominal lymphadenopathy

9

4

69%

27%

Hepatomegaly

8

2

80%

33%

Splenomegaly

1

1

-

-

Mesenteric mass

6

1

86%

33%

Pancreatic mass

0

0

-

-

  1. Note that if some cases of TB were missed through false negative cultures, then PPV and NPV will be under-estimated. Predictive values were not calculated when numbers were very small.
  2. PPV, positive predictive value. NPV, negative predictive value.