Effects of Population Compared to Purposive Sampling for Consensus in an Online Delphi Study

NCT03505450 | Completed

• 1 other identifier: PLOT-D Sampling Type Effects
• Study Type: observational
• Target: 385
• Locations: 1 country
• Sites: 1

Brief Summary

This study will be nested as a randomized controlled trial within an online Delphi and will assess the effects of the population sampling compared to purposive sampling for consensus in an online Delphi.

Conditions

Behavior, Consumer

Keywords

decision support tools,

Outcome Measures

Primary Outcomes (1)

• Delphi response rate differences as measured by % of completed questions between samples

  Full Delphi sample compared to a 10% randomized stratified sample taken from of the 5 stakeholder groups

  Up to 20 weeks or study completion

Study Arms (2)

Population sample

Other: Population Sample

Purposive Sample

Other: Purposive sample

Interventions

Population Sample OTHER

full sample of recruited participants

Population sample

Purposive sample OTHER

purposive sample of recruited participants

Purposive Sample

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

Healthy adults from an online cohort who are invited to come to consensus in an online Delphi

You may qualify if:

• Protocol lab online trials Delphi (PLOT-D) Participant

Sponsors & Collaborators

• ThinkWell: lead

Study Sites (1)

ThinkWell

Oxford, Oxfordshire, OX4 4DN, United Kingdom

Location

Related Publications (6)

• Brookes ST, Chalmers KA, Avery KNL, Coulman K, Blazeby JM; ROMIO study group. Impact of question order on prioritisation of outcomes in the development of a core outcome set: a randomised controlled trial. Trials. 2018 Jan 25;19(1):66. doi: 10.1186/s13063-017-2405-6.

  PMID: 29370827 BACKGROUND

• Sinha IP, Smyth RL, Williamson PR. Using the Delphi technique to determine which outcomes to measure in clinical trials: recommendations for the future based on a systematic review of existing studies. PLoS Med. 2011 Jan 25;8(1):e1000393. doi: 10.1371/journal.pmed.1000393.

  PMID: 21283604 BACKGROUND

• Fletcher AJ, Marchildon GP. Using the Delphi Method for Qualitative, Participatory Action Research in Health Leadership. International Journal of Qualitative Methods 2014;13:1-18

  BACKGROUND

• Brice A, Price A, Burls A. Creating a database of internet-based clinical trials to support a public-led research programme: A descriptive analysis. Digit Health. 2015 Nov 20;1:2055207615617854. doi: 10.1177/2055207615617854. eCollection 2015 Jan-Dec.

  PMID: 29942546 BACKGROUND

• Bagley HJ, Short H, Harman NL, Hickey HR, Gamble CL, Woolfall K, Young B, Williamson PR. A patient and public involvement (PPI) toolkit for meaningful and flexible involvement in clinical trials - a work in progress. Res Involv Engagem. 2016 Apr 27;2:15. doi: 10.1186/s40900-016-0029-8. eCollection 2016.

  PMID: 29062516 BACKGROUND

• Price A, Albarqouni L, Kirkpatrick J, Clarke M, Liew SM, Roberts N, Burls A. Patient and public involvement in the design of clinical trials: An overview of systematic reviews. J Eval Clin Pract. 2018 Feb;24(1):240-253. doi: 10.1111/jep.12805. Epub 2017 Oct 27.

  PMID: 29076631 BACKGROUND

MeSH Terms

Conditions

Consumer Behavior

Condition Hierarchy (Ancestors)

Behavior

Study Officials

• Amy Price, PhD

  University of Oxford

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: April 1, 2018
• First Posted: April 23, 2018
• Study Start: May 29, 2018
• Primary Completion: September 30, 2018
• Study Completion: October 29, 2018
• Last Updated: March 22, 2021

Record last verified: 2021-03

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL, ICF
• Time Frame: Post-publication for 5 years
• Access Criteria: Contact study investigator by email

Locations

GB (1)