Figure 1.

Cohort selection diagram for each experimental cohort where (a), (b), and (c) describe the criteria used to distinguish between the positive and negative admissions for each disease; (d), (e), and (f) present the proportions of positive hospital admissions that met each type of criteria; discharge ICD-9 criteria were based on the Clinical Classifications Software (CCS) diagnosis and procedure categorization scheme provided as part of the Healthcare Cost and Utilization Project (HCUP); and DOE refers to the Date-of-Event for each disease. Admissions that met only ICD-9 criteria were omitted from this study as we were unable to determine their DOE.