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Table 4 Formulas for estimating averted direct medical costs of chlamydia, gonorrhea, syphilis, and congenital syphilis

From: Formulas for estimating the costs averted by sexually transmitted infection (STI) prevention programs in the United States

Sequelae costs averted by treatment of people with chlamydia, gonorrhea, and syphilis
Chlamydia [(Cw)(0.16)(0.925)(0.70)($1,995)] + [(Cm+Cmsm)(0.03)(0.925)(0.70)($274)]
Gonorrhea [(Gw)(0.14)(0.79)(0.70)($1,995)] + [(Gm+Gmsm)(0.03)(0.90)(0.70)($274)]
Syphilis (Sw+Sm+Smsm)($572)
Congenital syphilis treatment costs averted by treatment of syphilis in women
  [X13 + 0.7(X14) + 0.3(X15)] [(0.5)($6,738)]
Treatment and sequelae costs averted by reducing transmission of chlamydia, gonorrhea, and syphilis in the population
Chlamydia [(Ĉw+ Ĉm)(0.5)($171)] + [(Ĉmsm)(0.5)($26)]
Gonorrhea [(Ĝw+ Ĝm)(0.5)($206)] + [(Ĝmsm)(0.5)($68)]
Syphilis wmmsm)(0.5)($572)
  1. The Ci, Gi, Si, Ĉi, Ĝi, and Ŝi terms are defined in Table 3. The Xi, Yi, and Zi terms are defined in Table 2. Syphilis cases include primary and secondary (P&S) syphilis only.