Kaplan-Meier cumulative incidence curves of resolution of Lyme arthritis after initiating first-line antibiotics C-GC, intra-articular glucocorticoid cohort; C-IV, intravenous antibiotics cohort; C-PO, oral antibiotics cohort Cumulative incidence plots showing resolution of Lyme arthritis over the first 2 years of follow-up by cohort: C-PO (black, long dash line), C-GC (dark grey, solid line), or C-IV (light grey, short dash line). Log-rank tests are shown comparing either C-GC or C-IV antibiotics to C-PO.