The analysis included all seropositive children with a reactive result on the Treponema pallidum hemagglutination assay
(TPHA) and with a rapid plasma reagin (RPR) titer of at least 1:2.
† The analysis included children with a reactive result on the TPHA and with an RPR titer of at least 1:16.
‡ The prevalence ratio was calculated with the use of a log-binomial regression model. The baseline prevalence is the reference
value. P