Evidence map›Paper›PMID 39957343›Full record

ArticleJournal of sleep research2025

Ikelos-Rating Scale: Validation of a Behavioural Severity Marker in REM Sleep Behaviour Disorder.

Sophia Stotz, Frederik Bes, Dieter Kunz

Abstract readValidation Study
In one paragraph

Article in Journal of sleep research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
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

1 citing paper in PubMed.

  1. Article
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

3 authors.

Sophia StotzClinic for Sleep & Chronomedicine, St. Hedwig-Hospital, Berlin, Germany.ORCID 0009-0005-5819-5634
Frederik BesClinic for Sleep & Chronomedicine, St. Hedwig-Hospital, Berlin, Germany.ORCID 0000-0003-0318-6093
Dieter KunzClinic for Sleep & Chronomedicine, St. Hedwig-Hospital, Berlin, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The Ikelos-Rating Scale (Ikelos-RS) is a new, expert-interviewed and bedpartner-reported severity marker assessing frequency and expression of isolated REM sleep behaviour disorder (iRBD), a precursor of clinical α-synucleinopathies. This study aimed to validate the Ikelos-RS in 180 patients with three-night PSG-confirmed iRBD (68.4 ± 8.3 years; 139 m). Inter-rater (n = 45) and test-retest reliabilities (n = 25; 174 Ikelos-RS) were evaluated. For construct validity, correlation analyses were performed with: (1) Clinical Global Impressions-Severity (CGI-S; n = 151), (2) REM sleep without atonia (RWA) within videometry (n = 20), (3) RWA at initial diagnosis (n = 131) and changes over time (n = 36), (4) dopamine transporter scintigraphy (DaT-SPECT) at baseline and changes over time (n = 75). RWA- and DaT-SPECT-analyses were conducted for the whole sample ('all') and after excluding confounders ('cleaned'). Correlation analyses indicated high inter-rater (r

Indexed as

REM Sleep Behavior DisorderSeverity of Illness IndexAgedDopamine Plasma Membrane Transport ProteinsFemaleHumansMaleMiddle AgedPolysomnographyReproducibility of ResultsTomography, Emission-Computed, Single-PhotonDopamine Plasma Membrane Transport ProteinsbiomarkerDaT‐SPECTiRBDRWAseverity scalevideometry

Identifiers

PMID39957343
PMCPMC12592839

What OpenQuestion holds

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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.