Fig. 2

Staging algorithm employed in PHS CKD Registry
Abbreviations: ESRD- End Stage Renal Disease; eGFR- estimated glomerular filtration rate. Definitions: eGFR1 = The most recent eGFR value within the last 3 years, eGFR2 = The second most recent eGFR value within the last 3 years, eGFR2’ = The most recent eGFR value within the last 3 years that occurred at least 90 days prior to eGFR1