Table 3 Sensitivity and specificity of 13C-UBT in validating subjects.

From: Cut-off optimization for 13C-urea breath test in a community-based trial by mathematic, histology and serology approach

13C-UBT

Giemsa (N, %)

Total

Kappa

P

Positive

Negative

Cut-off = 3.1

Positive

190(94.53)

10(10.10)

200

0.842

<0.001

Negative

11(5.47)

89(89.90)

100

  

Cut-off = 3.8

Positive

190(94.53)

7(7.07)

197

0.866

<0.001

Negative

11(5.47)

92(92.93)

103

  

Total

 

201(100.00)

99(100.00)

300

  
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