TABLE 2. Sensitivity analysis showing the effect of varying assumptions on the estimated prevalence (with 95% confidence intervals) of gonorrhea, chlamydia, and syphilis in adult women (15-49 years) and on new cases of congenital syphilis (CS) and of syphilis-associated adverse birth outcomes in Colombia in 2016.

Parameter altered	Gonorrhea prevalence, women	Chlamydia prevalence, women	Syphilis prevalence, women	Congenital syphilis cases	Adverse birth outcomes (subset of CS)
None (default estimate)	0.70% (0.15% to 1.9%)	9.2% (4.4% to 15.4%)	1.25% (1.21% to 1.29%)	3 851	2 245
Gonorrhea and chlamydia: add less-representative prevalence studies from Colombia into the estimation (see Annex 1; each of these assigned a weight of 20%)	0.50% (0.09% to 1.5%)	8.8% (4.4% to 14.7%)	Not applicable/as default	Not applicable/as default	Not applicable/as default
Syphilis: add blood donor screening data (using weights as shown in Annex 2)	Not applicable/as default	Not applicable/as default	1.04% (0.96% to 1.19%)	3 204	1 868

Source: Prepared by the authors from the study's estimations, based on the data presented in the annexes.