Fig. 1From: Intravenous iron supplementation does not increase infectious disease risk in hemodialysis patients: a nationwide cohort-based case-crossover studyTime frame of case and control periods. This case cross-over design involved only cases who experienced infectious disease needed intravenous antibiotics treatment, and each case served as his/her own control. The index date defined as the first date of intravenous antibiotics after commencing hemodialysisBack to article page