ArticleKidney medicine2023
Estimated GFR Accuracy When Cystatin C- and Creatinine-Based Estimates Are Discrepant in Older Adults.
Article in Kidney medicine, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
15 citing papers in PubMed, 1 synthesis or guideline pooled it, 23 citations in OpenAlex.
- Pooled it
- Impact of mGFR Versus eGFR on the Pharmacokinetics of a Renally Excreted Model Drug in Older Medical Patients: A Proof-of-Concept Trial.Kidney international reports · 2026Article
- Simple Bedside Muscle-Related Indicators Improve the Identification of Reduced Kidney Function in Hospitalized Older Adults: A Multicenter Cross-Sectional Study.Geriatrics & gerontology international · 2026Article
- Article
- Ethnic Disparities in CKD Progression: A Comparative Study of CRIC and KNOW-CKD Cohorts.Clinical journal of the American Society of Nephrology : CJASN · 2026Article
- Evaluation of race-free eGFR equations in individuals of different ethnicity.Blood pressure · 2025Article
- Albuminuria as a diagnostic criterion and a therapeutic target in heart failure and other cardiovascular disease.European journal of heart failure · 2025Review
- Malnutrition and Its Effect on Drug Pharmacokinetics: A Clinical Perspective.Clinical pharmacokinetics · 2025Review
- Discordant Results Between Creatinine- and Cystatin C-based Equations for Estimating GFR.Kidney international reports · 2025Article
- Large Discordance between Creatinine-Based and Cystatin C-Based eGFRs is Associated with Falls, Hospitalizations, and Death in Older Adults.Clinical journal of the American Society of Nephrology : CJASN · 2024Article
- Review
- Cystatin C- and Creatinine-based Estimated GFR Differences: Prevalence and Predictors in the UK Biobank.Kidney medicine · 2024Article
- Biomarkers of chronic kidney disease in older individuals: navigating complexity in diagnosis.Frontiers in medicine · 2024Review
- Cardiovascular disease in older women with CKD.Clinical kidney journal · 2023Article
- Discordance Between Creatinine-Based and Cystatin C-Based Estimated GFR: Interpretation According to Performance Compared to Measured GFR.Kidney medicine · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors at 3 institutions in 2 countries.
Funding
Abstract
Rationale & Objective: Serum creatinine and cystatin C are used to estimate glomerular filtration rate, but creatinine-based estimated glomerular filtration rate (eGFRcr), cystatin C-based estimated glomerular filtration rate (eGFRcys), and combined creatinine- and cystatin C-based estimated glomerular filtration rate (eGFRcr-cys) are often divergent, particularly in older adults. We investigated which estimated glomerular filtration rate (eGFR) was more accurate and less biased compared with measured glomerular filtration rate (mGFR). Study Design: A diagnostic test study from the Berlin Initiative Study. Setting & Participants: The study population included 657 individuals aged 70 years or older with iohexol plasma clearance (mGFR) and serum creatinine and cystatin C measurements: 567 community-dwelling participants and 90 with a serum creatinine of ≥1.5 mg/dL. Tests Compared: We defined 3 groups on the basis of the difference eGFRcys - eGFRcr: whether < -5 mL/min/1.73 m Outcome: Median bias (eGFR minus mGFR) with 95% CIs and accuracy (percentage of eGFR values within ±30% of mGFR). Results: The mean ± standard deviation age was 78 ± 6 years; the mean eGFRcys, eGFRcr, and eGFRcr-cys were 59 ± 23, 64 ± 20, and 61 ± 22 mL/min/1.73 m Limitations: Untested generalizability in younger populations. Conclusions: Among older adults, the lower eGFR between eGFRcys and eGFRcr was a more accurate and less biased estimate of mGFR when comparing the groups.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.