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Table 6 Formulas for estimating averted indirect costs (lost productivity) of chlamydia, gonorrhea, syphilis, congenital syphilis, and HIV

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

Indirect STI costs averted
Chlamydia [(Cw)(0.925)(0.70)($148)] + [(Cm+ Cmsm)(0.925)(0.70)($13)] + [(Ĉw + Ĉm)(0.5)($29)] + [(Ĉmsm)(0.5)($10)]
Gonorrhea [(Gw)(0.79)(0.70)($171)] + [(Gm+ Gmsm)(0.9)(0.70)($34)] + [(Ĝw + Ĝm)(0.5)($29)] + [(Ĝmsm)(0.5)($10)]
Syphilis [(Sw+Sm+Smsm)($112)] + [(Ŝwmmsm)(0.5)($112)]
Congenital syphilis [X13 + 0.7(X14) + 0.3(X15)] [(0.5)($60,421)]
Indirect HIV costs averted by reducing HIV transmission through treatment of STIs
Chlamydia [(Ĉw + Ĉm)(0.0011)(0.25)(0.75)($831,614)] + [(Ĉmsm)(0.0011)(0.25)(0.5)(0.25)($831,614)]
Gonorrhea [(Ĝw + Ĝm)(0.0007)(0.25)(0.75)($831,614)] + [(Ĝmsm)(0.0007)(0.25)(0.5)(0.25)($831,614)]
Syphilis [(Ŝw + Ŝm)(0.02386)(0.25)(0.75)($831,614)] + [(Ŝmsm)(0.02386)(0.25)(0.5)(0.25)($831,614)]
Indirect HIV costs averted by reducing HIV transmission through HIV counseling and testing
  [(X12 + Y12)(0.00045)(0.75)(0.875)($831,614)] + [(Z12)(0.00045)(0.50)(0.25)(0.875)($831,614)]
  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.