A core outcome set for public health interventions to prevent or reduce gambling-related harms

There is substantial heterogeneity in how public health interventions intended to prevent or reduce gambling-related harms - including policy and legal interventions - are evaluated for their effectiveness. To accurately inform policy and practice on the comparative effectiveness of such interventions, standardisation is required. The aim of this study is to establish consensus on a core outcome set (COS) that is to be used when evaluating the effects of these interventions.

Contributors

Professor Paul Montgomery-Marks, University of Birmingham (Work Package Lead)
Theodore Piper, University of Birmingham
Illin Gani, University of Birmingham
Michelle Fisher, University of Birmingham
Ameeta Retzer, University of Birmingham
Priyanka Sharma, University of Birmingham
Lucille Kelsall-Knight, University of Birmingham
Professor Kate Bedford, University of Birmingham (Co-PI)
Professor Joht Singh Chandan, University of Oxford (Co-PI)

Further Study Information

Current Stage: Ongoing
Date: September 2026 - March 2027
Funding source(s): This work is funded by the National Institute of Health and Care Research (award number: NIHR156218).


Health Area

Disease Category: Public health

Disease Name: Gambling-related harms (including gambling addiction)

Target Population

Age Range: 18 - 120

Sex: Either

Nature of Intervention: Other

Stakeholders Involved

- Charities
- Clinical experts
- Consumers (patients)
- Policy makers
- Regulatory agency representatives
- Researchers

Study Type

- COS for clinical trials or clinical research

Method(s)

- Consensus meeting
- Delphi process
- Focus group(s)
- Literature review
- Nominal group technique (NGT)

We propose a four-stage study: (1) preparation work, (2) focus groups, (3) Delphi surveys and (4) consensus meeting. First, an initial list of outcomes has been generated through two reviews and a mapping of UK datasets of gambling and associated harms. Second, focus groups have been conducted with (1) individuals with lived experience of gambling harm, (2) public health interventions providers, (3) academics and researchers, (4) policy makers and (5) members of the public. Third, this list of outcomes will be prioritised through a two-round online Delphi survey using a predefined consensus criterion. Finally, a consensus meeting will be held to agree on the final COS.

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