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Table 3 TPPA titer in infants at different follow-up time points

From: TPPA titer as a new adaptation for early diagnosis of congenital syphilis: a retrospective analysis of observation over three years in Yunnan, China

Case number

TPPA titer (median [P25, P75]) at follow-up time point

Z value

P value

First visit

3 M

6 M

9 M

12 M

15 M

18 M

24 M

36 M

SPA

 33

480 [80, 1280]

160 [80, 320]

80 [0, 160]

40 [0, 80]

40 [20, 80]

40 [0, 80]

0

0

0

44.935

< 0.001

CS

 6

1280 [160–1280]

ND

ND

ND

960 [160–1280]

ND

ND

960 [160–1280]

960 [160–1280]

9.714

0.046

  1. M month(s), ND not determined