The prognostic value of serological titres for clinical outcomes during treatment and follow-up of patients with chronic Q fever

We assessed the prognostic value of phase I IgG titres during treatment and follow-up of chronic Q fever.We performed a retrospective cohort study to analyse the course of phase I IgG titres in chronic Q fever. We used a multivariable time-varying Cox regression to assess our primary (first disease-related event) and secondary (therapy failure) outcomes. In a second analysis, we evaluated serological characteristics after 1 year of therapy...