Evidence map›Paper›PMID 40327387›Full record

Trial reportJournal of renal care2025

Influence of Baseline Itch Severity on Treatment Outcomes With Difelikefalin in Adults With Moderate-to-Severe Pruritus Receiving Maintenance Haemodialysis: An Exploratory Analysis.

Kieran McCafferty, Thilo Schaufler, Pablo Molina, Murray Lowe, Warren Wen, Daniel E Weiner

Registry-linked trialAbstract readClinical Trial, Phase III
In one paragraph

Trial report in Journal of renal care, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03998163 (An Open-Label, Multicenter Study to Evaluate the Safety and Effectiveness of Intravenous CR845 in Hemodialysis Patients With Moderate-to-Severe Pruritus), which is not on this 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.

NCT03998163 phase3completednot on this map

An Open-Label, Multicenter Study to Evaluate the Safety and Effectiveness of Intravenous CR845 in Hemodialysis Patients With Moderate-to-Severe Pruritus

TypeinterventionalSponsorCara Therapeutics, Inc.Ran2019 to 2020Enrolled222ConditionsUremic PruritusArmsCR845 0.5 mcg/kg
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

6 authors.

Kieran McCaffertyBarts Health NHS Trust, London, UK.ORCID http://orcid.org/0000-0002-0762-2270
Thilo SchauflerCSL Vifor, Glattbrugg, Switzerland.
Pablo MolinaDepartment of Nephrology, FISABIO, Hospital Universitari Dr Peset, Universitat de València, València, Spain.ORCID http://orcid.org/0000-0002-8311-6214
Murray LoweCSL Vifor, Glattbrugg, Switzerland.
Warren WenCara Therapeutics, Stamford, Connecticut, USA.
Daniel E WeinerWilliam B. Schwartz, MD, Division of Nephrology, Tufts Medical Center, Boston, Massachusetts, USA.

Funding

Funding for the overall phase 3 trial, Study 3105 (NCT03998163), was provided by Cara Therapeutics. This exploratory subgroup analysis from Study 3105 was funded by Vifor Fresenius Medical Care Renal Pharma Ltd, Switzerland.
6 · The paper itself

Abstract

backgroundDifelikefalin is well-tolerated and reduces itch among adults undergoing haemodialysis (HD), with chronic kidney disease-associated pruritus (CKD-aP).

objectiveThis study aims to explore the influence of baseline itch severity on difelikefalin treatment outcomes.

designStudy 3105 (NCT03998163) was a 12-week, phase 3, single-arm, open-label trial assessing safety and effectiveness of difelikefalin 0.5 µg/kg. We report key endpoints from 3105 by baseline itch severity, determined using the Worst Itching Intensity Numerical Rating Scale (WI-NRS [moderate: WI-NRS < 7; severe: WI-NRS ≥ 7]).

participantsAdult participants undergoing maintenance HD (n = 222) with mild-to-moderate CKD-aP (WI-NRS score ≥ 5 at baseline). MEASUREMENTS: The primary endpoint of 3105 was safety; secondary endpoints included reduction in itch intensity (WI-NRS), and improvements in itch-related quality of life (QoL; 5-D itch scale) and sleep quality (Sleep Quality Numerical Rating Scale).

findingsMean (SD) age was 57.1 (13.3) years; mean (SD) baseline WI-NRS scores were 6.0 (0.5) and 8.3 (0.9) for participants with moderate (n = 70/222) or severe (n = 152/222) itch, respectively. No treatment-related deaths occurred, and there were no safety concerns according to baseline itch severity. By week 12, both groups reported residual 'mild itch' according to mean (SD) WI-NRS scores (moderate: 2.9 [2.2]; severe: 3.1 [2.3]). Approximately one in four participants demonstrated 'complete response' in itch reduction (moderate: 27.1%; severe: 25.0%). Clinically relevant improvements in itch-related QoL and sleep quality occurred among both subgroups.

conclusionsDifelikefalin was well-tolerated and effective in reducing itch in participants with moderate and severe baseline itch, supporting its broad use in a range of individuals on HD with CKD-aP.

Indexed as

PruritusRenal DialysisAdultAgedFemaleHumansMaleMiddle AgedQuality of LifeRenal Insufficiency, ChronicSeverity of Illness IndexTreatment Outcomedifelikefalinhaemodialysispruritusquality of lifetolerability

Identifiers

PMID40327387
PMCPMC12054700

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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.