Figure 3

The prevalence of gonorrhoea and chlamydia at 60 years after introduction of STI under different A _s (with A _p and A _d at their baseline values, first and fourth rows), A _p (with A _s and A _d at their baseline values, second and fifth row) and A _d range (with A _s and A _p at their baseline values, third and sixth row). Each box represents the 25th-75th percentiles for 100 simulations. The centre line in each box indicates the median. The maximum whisker length is 1.5 times the width of interquartile range (corresponds to approximately 99.3% coverage if prevalence at steady state is normally distributed), and outliers are not plotted. The notch in each box represents the comparison intervals such that two medians are significantly different at the 5% significance level if their intervals do not overlap (see McGill R, Tukey JW, Larsen WA: Variations of Box Plots. The American Statistician 1978, 32:12–16). The baseline scenario is highlighted in shade for all rows.