Repeat testing is essential when estimating chronic kidney disease prevalence and associated cardiovascular risk.

Background: Investigations into chronic kidney disease (CKD) and cardiovascular disease in the CKD population may be misleading as they are often based on a single test of kidney function.

Aim: To determine whether repeat testing at 3 months to confirm a diagnosis of CKD impacts on the estimated prevalence of CKD and the estimated 10-year general cardiovascular risk of the CKD population.

Design And Methods: Blood and urine samples from presumed healthy volunteers were analysed for evidence of CKD on recruitment and again 3 months later.

Single estimated glomerular filtration rate and albuminuria measurement substantially overestimates prevalence of chronic kidney disease.

Background/aims: Guidelines require repeatedly diminished estimated glomerular filtration rate (eGFR) and/or albuminuria to diagnose chronic kidney disease (CKD), and advise screening only in select populations. Many estimates of CKD prevalence have used single measurements. This longitudinal study assessed eGFR and albuminuria reproducibility, and impact on estimate of CKD prevalence, in factory workers.