Evidence map›Paper›PMID 30285894›Full record

ArticleTrials2018

Treatment of pustular psoriasis with anakinra: a statistical analysis plan for stage 1 of an adaptive two-staged randomised placebo-controlled trial.

Suzie Cro, Catherine Smith, Rosemary Wilson, Victoria Cornelius

Open access · goldAbstract readClinical Trial ProtocolLetter
In one paragraph

Article in Trials, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
0.2field-weighted citation impact, top 47% 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

2 citing papers in PubMed, 6 citations in OpenAlex.

  1. Review
  2. 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

4 authors at 2 institutions in 1 country.

Suzie CroImperial Clinical Trials Unit, School of Public Health, Imperial College London, Stadium House, 68 Wood Lane, London, W12 7RH, UK. s.cro@imperial.ac.uk.ORCID http://orcid.org/0000-0002-6113-1173
Catherine SmithSt John's Institute of Dermatology, Guy's and St Thomas' NHS Foundation Trust and Kings College London, 9th Floor Tower Wing, Guy's Hospital, London, SE1 9RT, UK.
Rosemary WilsonSt John's Institute of Dermatology, Guy's and St Thomas' NHS Foundation Trust and Kings College London, 9th Floor Tower Wing, Guy's Hospital, London, SE1 9RT, UK.
Victoria CorneliusImperial Clinical Trials Unit, School of Public Health, Imperial College London, Stadium House, 68 Wood Lane, London, W12 7RH, UK.
Guy's Hospital · GBImperial College London · GB

Funding

Department of Health 13/50/17Department of Health EME/13/50/17Efficacy and Mechanism Evaluation Programme 13/50/17
6 · The paper itself

Abstract

backgroundPalmoplantar pustulosis (PPP) is a rare, chronic inflammatory skin disease. It is known to affect quality of life at a level comparable to that from major medical and psychiatric illness, yet current treatment options are remarkably limited. Recent evidence however suggests that interleukin-1 (IL-1) blockade with anakinra will deliver therapeutic benefit in PPP.

methodsAnakinra for Pustular psoriasis: Response in a Controlled Trial (APRICOT) is a two-staged, adaptive, double-blind, randomised placebo-controlled trial which aims to test the hypothesis that IL-1 blockade with anakinra will deliver therapeutic benefit in PPP. During stage 1 a total of 24 patients will be randomised (1:1) to receive either placebo or anakinra. The two candidate primary outcomes are fresh pustule count (across palms and soles) and the Palmoplantar Pustulosis Area and Severity Index (PPPASI) score, recorded at baseline and at weeks 1, 4 and 8. Analysis at the end of stage 1 will compare treatment arms to ensure sufficient efficacy and safety in order to progress to stage 2. The primary outcome for stage 2 will also be identified following an assessment of the reliability and discriminative ability of fresh pustule count and PPPASI. The trial is powered to detect efficacy and will recruit an additional 40 patients in stage 2 (n = 64 in total). Analysis will follow the intention-to-treat principle and analyse patients as randomised. DISCUSSION: This manuscript describes the important features of the small population trial design for APRICOT and the pre-specified statistical analysis plan for stage 1. The statistical analysis plan has been developed prior to data extraction and in compliance with international guidelines. It will increase the transparency of the data analysis for the APRICOT trial. The findings of the trial will help to clarify the role of anakinra in the treatment of PPP.

trial registrationISCRTN, ISCRTN13127147 . Registered on 1 August 2016. EudraCT Number 2015-003600-23 . Registered on 1 April 2016.

Indexed as

Adaptive Clinical Trials as TopicData Interpretation, StatisticalDermatologic AgentsDouble-Blind MethodHumansInterleukin 1 Receptor Antagonist ProteinPsoriasisRandomized Controlled Trials as TopicSeverity of Illness IndexSkinTime FactorsTreatment OutcomeWound HealingDermatologic AgentsInterleukin 1 Receptor Antagonist ProteinAdaptive trialAnakinraPalmoplantar pustulosisPsoriasisRandomised controlled trialStatistical analysis plan

Identifiers

PMID30285894
PMCPMC6169096
OpenAlexW2894985635

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.