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Concentrations of antibodies to chlamydial LPS (IgA, IgG, and IgM; solid line) and to human CMV (IgG and IgM; dotted line) at baseline and 1 and 6 months after PTCA. Concentrations of chlamydial antibodies are expressed as an index (calculated as the optical density of the sample/cutoff), and antibodies to CMV are expressed as a percentage of antibodies present in the reference serum. Error bars indicate standard errors of the means. ∗, P < 0.05; ∗∗, P < 0.005 versus baseline levels.
