Figure 1.

Study schema. A schematic representation of the study is shown. In the 30 days before the index date, eligible patients were required to have Medicare parts A and B claims availability and no missed treatments for any reason. Eligible patients were ascribed an exposure status based on their pattern of treatment attendance on the index date and following day. Outcomes were considered over the 7- and 30-day periods following exposure assignment. Abbreviations: ED, emergency department; Tx, treatment.