Fig. 2
Estimates of the eight models for the percentage of specific anatomical sites positive for Chlamydia trachomatis for the 8 models (model 2, 7–13) and the 95% confidence intervals for the observed site-specific positivity among 4888 MSM attending Melbourne Sexual Health Centre in 2018 and 2019. The prevalence of oropharyngeal and urethral infection is zero and that therefore the dashed lines are missing. Model 2 (dark grey asterisk): anal and oral sex and rimming. Model 7 (cyan asterisk): anal sex and oral sex, rimming and sequential oral/anal sex. Model 8 (red asterisk): anal sex and oral sex and rimming and using saliva as a lubricant for anal sex. Model 9 (green asterisk): anal sex and oral sex and rimming and sequential oral sex/riming. Model 10 (blue asterisk): anal sex and oral sex and rimming, sequential oral/anal sex and using saliva as a lubricant for anal sex. Model 11 (black asterisk): anal sex and oral sex and rimming and sequential oral/anal sex and sequential oral sex/riming. Model 12 (magenta asterisk): anal sex and oral sex and rimming and using saliva as a lubricant for anal sex and sequential oral sex/riming. Model 13 (dim grey asterisk): anal sex and oral sex and rimming and sequential oral/anal sex and using saliva as a lubricant for anal sex and sequential oral sex/riming