Table 3

Multivariable logistic analyses of the risk factors for congenital syphilis

VariablesORs (95% CI)p Values
Stage of maternal syphilis
 Early (<2 years)2.19 (0.72 to 6.68)
 Late (≥2 years or unknown)Reference0.169
Log (1/T)*0.68 (0.05 to 8.72)0.767
GW1.01 (0.92 to 1.10)0.898
GW×log (1/T)1.09 (1.00 to 1.19)0.047
  • * The values were transformed by the log (the reciprocal of the TRUST titre in mothers).

  • The gestational week (GW) at treatment for maternal syphilis.

  • The interaction between GW and log (1/T).

  • TRUST, toluidine red unheated serum test.