Evidence map›Paper›PMID 34840504›Full record

ReviewJournal of central nervous system disease2021

The Influence of Renal Function Impairment on Kappa Free Light Chains in Cerebrospinal Fluid.

Franz F Konen, Philipp Schwenkenbecher, Ulrich Wurster, Konstantin F Jendretzky, Nora Möhn, Stefan Gingele, Kurt-Wolfram Sühs, Malte J Hannich, Matthias Grothe, Torsten Witte and 3 more

Open access · goldAbstract readReview
In one paragraph

Review in Journal of central nervous system disease, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
0.8field-weighted citation impact, top 28% of its field
1 · What the graph read from 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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

17 citing papers in PubMed, 1 synthesis or guideline pooled it, 19 citations in OpenAlex.

  1. Pooled it
  2. Observational
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors at 2 institutions in 1 country.

Franz F KonenDepartment of Neurology, Hannover Medical School, Hannover, Germany.ORCID https://orcid.org/0000-0002-8609-5674
Philipp SchwenkenbecherDepartment of Neurology, Hannover Medical School, Hannover, Germany.
Ulrich WursterDepartment of Neurology, Hannover Medical School, Hannover, Germany.
Konstantin F JendretzkyDepartment of Neurology, Hannover Medical School, Hannover, Germany.
Nora MöhnDepartment of Neurology, Hannover Medical School, Hannover, Germany.
Stefan GingeleDepartment of Neurology, Hannover Medical School, Hannover, Germany.
Kurt-Wolfram SühsDepartment of Neurology, Hannover Medical School, Hannover, Germany.
Malte J HannichInstitute of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Greifswald, Germany.
Matthias GrotheDepartment of Neurology, University Medicine Greifswald, Greifswald, Germany.
Torsten WitteDepartment of Clinical Immunology & Rheumatology, Hannover Medical School, Hannover, Germany.
Martin StangelDepartment of Neurology, Hannover Medical School, Hannover, Germany.
Marie SüßeDepartment of Neurology, University Medicine Greifswald, Greifswald, Germany.
Thomas SkripuletzDepartment of Neurology, Hannover Medical School, Hannover, Germany.
Medizinische Hochschule Hannover · DEUniversitätsmedizin Greifswald · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe determination of kappa free light chains (KFLC) in cerebrospinal fluid (CSF) is an upcoming biomarker for the detection of an intrathecal immunoglobulin synthesis. Since renal function impairment leads to altered serum KFLC and albumin concentrations, interpretation of KFLC in CSF may be influenced by these parameters.

methodsIn this two-center study, the influence of renal function (according to the CKD-EPI creatinine equation) on KFLC and albumin concentrations was investigated in patients with "physiological" (n = 139), "non-inflammatory" (n = 146), and "inflammatory" (n = 172) CSF profiles in respect to the KFLC index and the evaluation in quotient diagrams in reference to the hyperbolic reference range (KFLC IF).

resultsAll sample groups displayed declining KFLC indices and KFLC IF values with decreasing renal function (

conclusionsThe influence of renal function should be considered while interpreting KFLC results in patients with neuroinflammatory diseases. The interpretation of KFLC in quotient diagrams is less susceptible to renal function impairment than the KFLC index and should be preferentially used.

Indexed as

biomarkercerebrospinal fluideGFRkappa free light chains (KFLC)reiber’s diagramrenal function

Identifiers

PMID34840504
PMCPMC8619759
OpenAlexW3214947182

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.