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Online Supermarket ‘Salt Swap’

Salt Swap: The impact of offering shoppers lower-salt foods in an experimental online supermarket (Online Supermarket ‘Salt Swap’)

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN91306993
Enrollment
900
Registered
2018-03-09
Start date
2017-06-15
Completion date
Unknown
Last updated
2022-10-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hypertension Circulatory System Essential (primary) hypertension

Interventions

This study will use a bespoke virtual online supermarket shopping (OLS) platform, hosted by The University of Oxford, which emulates a real online supermarket for research purposes on food purchasing

Sponsors

University of Oxford, CTRG
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. People aged 18 or over 2. Self-reported high blood pressure 3. Speak English 4. Regularly shop in a supermarket spending at least £25 per shop 5. Responsible for at least some of their household grocery shopping

Exclusion criteria

Exclusion criteria: 1. People who are following a medically prescribed diet or restricted diet such as a vegetarian, vegan or gluten-free diet 2. People without self-reported hypertension 3. Not meeting the other inclusion criteria

Design outcomes

Primary

MeasureTime frame
Salt content of foods in the total basket (measured in g/100g), recorded automatically by the study website at completion of the study task

Secondary

MeasureTime frame
Recorded automatically by the study website at completion of the study task: 1. The mean salt reduction across all foods, measured in mg/MJ 2. The mean reduction in salt content of swapped items (mg) 3. The proportion of swaps accepted out of those offered 4. Frequency of swaps offered 5. The proportion of accepted swaps out of total shopping basket items 6. The overall cost of the shopping basket 7. The total energy, energy density, sugar and saturated fat content of the shopping basket

Countries

United Kingdom

Contacts

Public ContactSarah Payne Riches
saltswap@phc.ox.ac.uk+44 (0)1865 289300

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 23, 2026