How robust are the natural history parameters used in chlamydia transmission dynamic models? A systematic review

Table 2 Summary of chlamydia natural history parameters used in included studies and suggested evidence based parameter values for future transmission dynamic models

Parameter	Range used in included papers	Suggested value
Proportion asymptomatic	Male: 25% - 100%	To be based on observed treatment seeking rates in the modelled population[24]
	Female: 70% - 95.5%
Duration of infection
a) Symptomatic	Male: 30 – 33 days	30 - 33 days (consensus)
	Female: 30 – 40 days	30 - 33 days (consensus)
b) Asymptomatic	Male: 180 days – 3 years	497 days[59]
	Female: 180 days – 3 years	497 days[59]
Risk of transmission per act	0.0375 – 0.154 male - female	0.095 (IQR 0.06 – 0.167)[60]
	0.0375 – 0.122 female - male	0.095 (IQR 0.06 – 0.167)[60]

ISSN: 1742-4682