Figure 1.

Odds ratios (the dots) and their 95% confidence intervals for the association of the occurrence of particular virulence genes in the E. coli isolates with the age of adults (18–56 years). The relations between the virulence gene and age of adults were described by logistic models. If the 95% CI is above the value of 1, this means that the ratio of the odds of the virulence gene’s occurrence increases with age; otherwise this ratio decreases with age. A narrow confidence interval indicates higher precision of the odds ratio.