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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