Evidence map›Paper›PMID 35507446›Full record

Trial reportJournal of the peripheral nervous system : JPNS2022

Assessing deterioration using impairment and functional outcome measures in chronic inflammatory demyelinating polyneuropathy: A post-hoc analysis of the immunoglobulin overtreatment in CIDP trial.

Robin van Veen, Luuk Wieske, Ilse Lucke, Max E Adrichem, Ingemar S J Merkies, Ivo N van Schaik, Filip Eftimov

Open access · greenAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Journal of the peripheral nervous system : JPNS, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 3 pooled it
1.6field-weighted citation impact, top 15% 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

13 citing papers in PubMed, 3 syntheses or guidelines pooled it, 14 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Subcutaneous immunoglobulins (SCIG) for chronic inflammatory demyelinating polyneuropathy (CIDP): A comprehensive systematic review of clinical studies and meta-analysis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2024
    Pooled it
  4. Trial
  5. Trial
  6. Article
  7. What is refractory CIDP?BMJ neurology open · 2026
    Article
  8. Review
  9. Article
  10. Article
  11. Review
  12. Safety and Efficacy of Pulmonary Rehabilitation for Long COVID Patients Experiencing Long-Lasting Symptoms.International journal of environmental research and public health · 2024
    Article
  13. Review
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

7 authors at 4 institutions in 2 countries.

Robin van VeenDepartment of Neurology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.ORCID 0000-0001-7702-4930
Luuk WieskeDepartment of Neurology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Ilse LuckeDepartment of Neurology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Max E AdrichemDepartment of Neurology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Ingemar S J MerkiesMaastricht Academic Medical Centre, Maastricht, The Netherlands.
Ivo N van SchaikDepartment of Neurology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Filip EftimovDepartment of Neurology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Amsterdam Neuroscience · NLMaastricht University Medical Centre · NLSpaarne Ziekenhuis · NLSt. Antonius Ziekenhuis · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

It is unclear whether frequently used cutoff values for outcome measures defining minimal clinically important differences (MCIDs) can accurately identify meaningful deterioration in chronic inflammatory demyelinating polyneuropathy (CIDP). We used data from the immunoglobulin overtreatment in CIDP (IOC) trial, in which 60 clinically stable patients with CIDP were randomized to intravenous immunoglobulin (IVIg) withdrawal or continuation. We calculated change scores of the Inflammatory Rasch-Built Overall Disability Scale (I-RODS), grip strength, and Medical Research Council-sum score (MRC-SS) and classified visits based on a treatment anchor (ie, decision to restart/increase treatment after reaching a predefined early endpoint of deterioration). The variability of scores in patients without deterioration was calculated using the limits of agreement. We defined optimized MCIDs for deterioration and specific combinations of MCIDs from different outcome measures, and subsequently calculated the accuracies of the (combined) MCIDs. Substantial variability was found in scores of the I-RODS, grip strength and MRC-SS in patients without deterioration over time, and most MCIDs were within the limits of the variability observed in patients without deterioration. Some MCID cut-offs were insensitive but highly specific for detecting deterioration, for example, the MCID-SE of -1.96 of the I-RODS and -2 point on the MRC-SS. Others were sensitive, but less specific, for example, -4 centiles of the I-RODS. Some combined MCIDs resulted in high specificities and moderate sensitivities. Our results suggest that clinically important deterioration cannot be distinguished from variability over time with currently used MCIDs on the individual level. Combinations of MCIDs might improve the accuracy of determining deterioration, but this needs validation.

Indexed as

Polyradiculoneuropathy, Chronic Inflammatory DemyelinatingHumansImmunoglobulins, IntravenousMinimal Clinically Important DifferenceOutcome Assessment, Health CareOvertreatmentTreatment OutcomeImmunoglobulins, Intravenouschronic inflammatory demyelinating polyneuropathyminimum important differenceoutcome measures

Identifiers

PMID35507446
PMCPMC9321849
OpenAlexW4225412155

What OpenQuestion holds

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LicenceCC BY-NC
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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.