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🫘 eGFR CKD-EPI Cystatin C (2012)

UseWhen to use: cystatin C available; creatinine eGFR uncertain (e.g. low muscle mass).

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StrataMaps to G1–G5 teaching bands; no race term.

LimitsWhen not to use: unstable creatinine/cystatin kinetics alone for dosi… · Pitfall: steroids/thyroid altering cystatin. · Prefer combined Cr–Cys equations when both measured.

SourceInker LA et al. CKD-EPI 2012 cystatin C equation

Runs locally in your browser (no PHI uploaded). For licensed clinicians — not a substitute for clinical judgement.
Stored on this device for revisit reminders

This-shift next steps

After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.

Scene next step
📋Renal function / dosingOpen scene pack →
Related scores
Matching pathway
🧭hyperkOpen pathway →
Score + version; reference only — not a substitute for care · no HIS write

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Methodology · worked example, guidelines & full notes
Clinical takeaway

CKD-EPI 2012 CysC.

When to use

When to use: cystatin C available; creatinine eGFR uncertain (e.g. low muscle mass).

How it works

133 × min(Scys/0.8,1)^−0.499 × max(Scys/0.8,1)^−1.328 × 0.996^Age [×0.932 if female].

Key points

  • CKD-EPI 2012 CysC.
  • No race factor.
  • Next: CKD staging.

References

  • Inker LA et al. CKD-EPI 2012 cystatin C equation

Worked calculation

The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.

Serum cystatin C1.0 mg/L
Age60 years
SexFemale

→eGFR CysC72mL/min/1.73 m²

  • Equation：CKD-EPI 2012 cystatin C
  • Cue：60–89 — G2-range cue
Serum cystatin C1.0 mg/L
Age60 years
SexMale

→eGFR CysC78mL/min/1.73 m²

  • Equation：CKD-EPI 2012 cystatin C
  • Cue：60–89 — G2-range cue
Verification & sources · governance
FAQ

Frequently asked questions

Does eGFR CKD-EPI Cystatin C (2012) upload patient data? Where is it calculated?
Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
How is eGFR CKD-EPI Cystatin C (2012) calculated in practice? Can you show a worked example?
Inputs: Serum cystatin C 1.0 mg/L, Age 60 years, Sex Female → Result: eGFR CysC 72 mL/min/1.73 m²（Equation: CKD-EPI 2012 cystatin C, Cue: 60–89 — G2-range cue） Inputs: Serum cystatin C 1.0 mg/L, Age 60 years, Sex Male → Result: eGFR CysC 78 mL/min/1.73 m²（Equation: CKD-EPI 2012 cystatin C, Cue: 60–89 — G2-range cue）
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