Trial reportPloS one2018
Recruiting and retaining participants in e-Delphi surveys for core outcome set development: Evaluating the COMiT'ID study.
Trial report in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 3 of them syntheses that pooled 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.
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.
Who cites it
73 citing papers in PubMed, 3 syntheses or guidelines pooled it.
- Core outcome set for intervention research on snakebite envenomation in South Asia.Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention · 2026Pooled it
- Systematic review of international Delphi surveys for core outcome set development: representation of international patients.BMJ open · 2020Pooled it
- Core outcomes in neonatology: development of a core outcome set for neonatal research.Archives of disease in childhood. Fetal and neonatal edition · 2020Pooled it
- Trial
- Multi-Round compared to Real-Time Delphi for consensus in core outcome set (COS) development: a randomised trial.Trials · 2021Trial
- Occupational advice to help people return to work following lower limb arthroplasty: the OPAL intervention mapping study.Health technology assessment (Winchester, England) · 2020Trial
- Criteria for Control and Remission of Respiratory Allergic Disease With Allergen Immunotherapy: A Delphi Consensus.Clinical and translational allergy · 2026Article
- Supporting General Practitioners to Deprescribe Benzodiazepines and Z-Drugs in Primary Care: Findings From a Modified Delphi Study.Basic & clinical pharmacology & toxicology · 2026Article
- A core outcome set and reporting checklist for research on critically ill obstetric patients: An international consensus study.Acta obstetricia et gynecologica Scandinavica · 2026Article
- Developing a policy maturity model for prescription digital therapeutics based on expert consensus: protocol for an eDelphi study.BMJ open · 2026Article
- What Should Be Discussed When Considering a Vaginal Birth? A Delphi Consensus Study.BJOG : an international journal of obstetrics and gynaecology · 2026Article
- Adaptation and Content Validation of the Adherence to Treatment of Neurological Physiotherapy Questionnaire (AdT-NeuroPhysio) in Spanish People with Stroke.Patient preference and adherence · 2026Article
- Developing internationally agreed core indicators for surveillance of preconception health: protocol for a consensus study.PloS one · 2026Article
- Article
- Protocol for a modified Delphi study of ethical oversight of data science health research (DSHR).BMJ open · 2025Article
- Consensus Guidelines for the Follow-Up Care of Long-Term Cancer Survivors and Their Families for Primary Care Nurses in Spain: A Modified Delphi Study.Nursing & health sciences · 2025Article
- Content Validity Testing of a Nurse-Led Pediatric Dysphagia Screening Tool for Acute and Critical Care Settings Using eDelphi Methodology.Children (Basel, Switzerland) · 2025Article
- Article
- Global medium-term research priority setting for seasonal malaria chemoprevention: results from an eDelphi study.BMJ global health · 2025Article
- The therapeutic alliance during remotely delivered therapy: A Delphi study with health professionals.The British journal of clinical psychology · 2025Article
13 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
Abstract
backgroundA Core Outcome Set (COS) is an agreed list of outcomes that are measured and reported in all clinical trials for a particular health condition. An 'e-Delphi' is an increasingly popular method for developing a COS whereby stakeholders are consulted via a multi-round online survey to reach agreement regarding the most important outcomes. Many COS studies seek diverse, international input that includes professionals and healthcare users. However, the recruitment and retention of participants can be deterred by various factors (e.g. language barriers and iterative, time-consuming rounds). This report evaluates the effectiveness of recruitment and retention methods used in the Core Outcome Measures in Tinnitus International Delphi (COMiT'ID) study using participant feedback from healthcare users, healthcare practitioners, researchers, commercial representatives and funders.
methodsA range of methods were applied to recruit participants to the study and maintain engagement over the three rounds. Feedback on recruitment and retention methods was collected using a twenty-item online questionnaire, with free text comments.
resultsA personalised email invitation was the most frequent recruitment route, and 719 professionals and healthcare users consented to take part. Retention of each stakeholder group ranged from 76 to 91% completing all three e-Delphi rounds. Feedback was given by 379 respondents. A majority of respondents were satisfied with the study methods that were implemented to promote retention. Over 55% indicated that their overall experience closely matched their expectations at the start of the study, and over 90% felt that their contribution was appreciated.
conclusionsThis report highlights study methods that worked well with respect to recruitment and retention, and those that did not. Findings provide a unique contribution to the growing evidence base of good practice in COS development by demonstrating the relative effectiveness of recruitment and retention methods for an e-Delphi survey.
trial registrationThis project was registered (November 2014) in the database of the Core Outcome Measures in Effectiveness Trials (COMET) initiative. The protocol is published in Trials (doi:10.1186/s13063-017-2123-0).
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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.