Journal: BMC Nephrology
Article Title: Metabolic acidosis is associated with increased risk of adverse kidney outcomes and mortality in patients with non-dialysis dependent chronic kidney disease: an observational cohort study
doi: 10.1186/s12882-021-02385-z
Figure Lengend Snippet: Patient selection flow diagram. Investigators had full access to the database extract but no direct access to the Optum database. Abbreviations: AKI, Acute Kidney Injury; CKD, chronic kidney disease; CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration; eGFR, estimated glomerular filtration rate; EHR, Electronic Health Records
Article Snippet: Data from 1 to 2007 through 31 March 2017 was extracted from the Optum’s de-identified Integrated Electronic Health Record (EHR) Database; all data are de-identified in compliance with the Health Insurance Portability and Accountability Act (HIPAA), so consent was not required.
Techniques: Selection, Filtration