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. 2022 Feb 10;17(2):e0263277. doi: 10.1371/journal.pone.0263277

Fig 1. Study design and timeline.

Fig 1

The Index Date (i.e., Baseline) was defined as the timepoint when diagnostic criteria for both T2D and CAD were first identified in patients who underwent PCI. All available EHRs prior to January 2014 were considered to extract information regarding the clinical history of patients (dotted blue line). The follow-up period ranged from the Index Date to the end of the study period or the last data point available. Unstructured data from patients’ EHRs was extracted and organized with the EHRead® technology. See the Methods section for further details. *Estimated prevalence data for T2D calculated over the total patient population at midpoint of the study period minus both patients who died in the hospital during the study period (N = 41,747) and patients without follow-up data in the 12 months prior to midpoint (N = 1,460,161).