Ham DC, Lin C, Newman L, Wijesooriya NS, Kamb M. Improving global estimates of syphilis in pregnancy by diagnostic test type: A systematic review and meta-analysis.
Int J Gynaecol Obstet 2015;
130 Suppl 1:S10-4. [PMID:
25963909 PMCID:
PMC4591031 DOI:
10.1016/j.ijgo.2015.04.012]
[Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND
"Probable active syphilis," is defined as seroreactivity in both non-treponemal and treponemal tests. A correction factor of 65%, namely the proportion of pregnant women reactive in one syphilis test type that were likely reactive in the second, was applied to reported syphilis seropositivity data reported to WHO for global estimates of syphilis during pregnancy.
OBJECTIVES
To identify more accurate correction factors based on test type reported.
SEARCH STRATEGY
Medline search using: "Syphilis [Mesh] and Pregnancy [Mesh]," "Syphilis [Mesh] and Prenatal Diagnosis [Mesh]," and "Syphilis [Mesh] and Antenatal [Keyword].
SELECTION CRITERIA
Eligible studies must have reported results for pregnant or puerperal women for both non-treponemal and treponemal serology.
DATA COLLECTION AND ANALYSIS
We manually calculated the crude percent estimates of subjects with both reactive treponemal and reactive non-treponemal tests among subjects with reactive treponemal and among subjects with reactive non-treponemal tests. We summarized the percent estimates using random effects models.
MAIN RESULTS
Countries reporting both reactive non-treponemal and reactive treponemal testing required no correction factor. Countries reporting non-treponemal testing or treponemal testing alone required a correction factor of 52.2% and 53.6%, respectively. Countries not reporting test type required a correction factor of 68.6%.
CONCLUSIONS
Future estimates should adjust reported maternal syphilis seropositivity by test type to ensure accuracy.
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