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Kidney Age Communication Concept — ESENeph MCQ

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EasyChronic Kidney DiseaseKidney Age Communication ConceptESENeph

A 55-year-old man with CKD G4 asks his nephrologist about the concept of kidney age. His biological age is 55 but his kidney function (eGFR 22) corresponds to a much older person. How can this be communicated?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: C — The kidney age concept translates eGFR into the age at which that eGFR would be expected in a healthy person – his eGFR of 22 corresponds to a kidney age of approximately 85-90 years; this helps patients understand CKD severity in intuitive terms

The kidney age concept (analogous to lung age in COPD or heart age in cardiovascular risk) translates eGFR into the age at which that level of kidney function would be expected in a healthy ageing population (normal eGFR decline is approximately 0.7-1 mL/min/year after age 30). An eGFR of 22 in a 55-year-old represents kidney function decades ahead of biological age. Studies show that communicating kidney age improves patient understanding and engagement with CKD management. While not a validated clinical tool, it is increasingly used in patient communication.

Reference: Levey et al 2009 – CKD Communication; KDIGO 2024 – Patient Engagement