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. 2016 Dec 14;184(12):873–883. doi: 10.1093/aje/kww152

Figure 3.

Figure 3.

Adjusted measures of association between 2 types of human papillomavirus (HPV), designated type 1 and type 2, under different combinations of infection duration (in years) and transmission probabilities (per sex act with an infected individual). No interactions between HPV types are assumed. A) Prevalence odds ratio (POR); compares HPV type 2 infection prevalence odds in HPV type 1-infected versus -uninfected individuals. B) Incidence rate ratio (IRR) by infection status; compares the HPV type 2 incidence rate in HPV type 1-infected versus -uninfected individuals. C) IRR by immunity status; compares the HPV type 2 incidence rate in HPV type 1-immune versus -nonimmune individuals. All PORs and IRRs are measured in the overall population and adjusted for sexual activity level using Mantel-Haenszel estimators. White areas represent combinations of transmission probabilities and infection durations for which sustained transmission becomes impossible and the infections are eliminated from the model population. The black circle represents the base-case scenario.