Table 1 Summary of studies estimating CKD prevalence in the UK [14–21]

130,266 patients from GP practices in Kent, Manchester and Surrey, aged 18 and over

Single eGFR (MDRD) determined from calibrated creatinines

8.5%

Up to 930,977 patients from practices in the Quality Improvement in CKD study (QICKD), aged 18 and over

Various methods including single and multiple eGFR readings (MDRD and CKD-EPI)

4.8–6.8%

Data from the Health Survey for England 2009–2010, involving more than 6000 participants, aged 16 and over

Single eGFR reading (MDRD and CKD-EPI) in combination with urine estimation of albuminuria

5.2–6.0%

Approximately 2.8 million individuals in the General Practice Research Database (GPRD), aged 18 and over

Two laboratory eGFR readings at least 90 days apart (MDRD) and Read diagnostic codes

5.9%

Data from The Health Improvement Network (THIN) database, comprising 2,707,130 patients from 426 GP practices, aged 18 and over

2 most recent laboratory eGFR readings taken at least 7 days apart (MDRD) and Read diagnostic codes

4.0%

Data from 911 GP practices from England and Wales, encompassing 5.2 million adults

Two eGFR calculations at least 90 days apart (MDRD), Read diagnostic codes

5.5%