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Table 1 Existing CKD cohort studies

From: The natural history of, and risk factors for, progressive Chronic Kidney Disease (CKD): the Renal Impairment in Secondary care (RIISC) study; rationale and protocol

Cohort Population Year commenced Number recruited
Chronic Renal Impairment in Birmingham (CRIB) [30] CKD with Creatinine >1.47 mg/dl (130 mmol/l) pre-dialysis 1997 369 (completed)
Mild to Moderate Kidney Disease study (MMKD) [31] Patients who had attended secondary care nephrology clinics at least twice 1997 277 (completed)
Longitudinal Chronic Kidney Disease Study (LCKD) [32] Secondary care, GFR < 50 ml/min on two occasions 2000 820 (completed)
Chronic Renal Insufficiency Standards Implementation Study (CRISIS) [33] Secondary care stage 3–5 CKD (pre-dialysis) 2002 1325 (completed)
Chronic Renal Insufficiency Cohort (CRIC) [34, 35] Secondary care, all CKD stages 2003 3612 (still recruiting)
Study for the evaluation of early kidney disease (SEEK) [36] Predominantly primary care (29% from secondary care), inclusion based upon single eGFR ≤60 ml/min 2004 1814 (completed)
Renal Risk In Derby (R2ID) [37] Primary care, eGFR 30-59 ml/min on more than two occasions three months apart 2008 1741 (completed)