FIG 3.

Comparison of the magnitude of the C. trachomatis OmcB ELISA IgG1 response at a baseline versus 6-month follow-up visit. The magnitude of the C. trachomatis OmcB ELISA IgG1 response was compared between the baseline and follow-up (6 mo. FU) visits in all women (n = 95) (A), women with reinfection at follow-up (n = 21) (B), and women without reinfection at follow-up (n = 74) (C). Data for OD₄₀₅ values are represented as a box-and-whiskers plot, with boxes denoting interquartile ranges and whiskers denoting the 5th and 95th percentiles. The median is shown as a horizontal line. Significance between the IgG1 responses was determined by a Wilcoxon signed-rank test.