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Table 3 Positive likelihood ratio of diagnostic indicators for chronic HBV-infected infants

From: Dynamic changes of HBV markers and HBV DNA load in infants born to HBsAg(+) mothers: can positivity of HBsAg or HBV DNA at birth be an indicator for HBV infection of infants?

Diagnostic indicators

N

Infected

Uninfected

Positive likelihood ratio

N

True positive ratio

N

False positive ratio

HBV DNA(+) at birth

21

9

9/9 = 1

12

12/139 = 0.086

11.6

HBsAg(+) at birth

41

9

9/9 = 1

32

32/139 = 0.230

4.34

HBV DNA- and HBsAg- positive at birth

18

9

9/9 = 1

9

9/139 = 0.065

15.4

Anti-HBs(−) at 1 month old

9

9

9/9 = 1

0

0/139 = 0

+∞