SaltSwitch: A randomised controlled trial of the effect of a smartphone application to support lower salt food choices

Not Applicable

Completed

• Conditions: Cardiovascular disease; Cardiovascular - Hypertension; Diet and Nutrition - Other diet and nutrition disorders

• Registration Number: ACTRN12614000206628
• Lead Sponsor: ational Institute for Health Innovation, The University of Auckland

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2014-02-26
• Last Update Posted: 13 January 2020

Recruitment & Eligibility

• Status: Completed
• Sex: All
• Target Recruitment: 300

Inclusion Criteria

Group 1: Participants with cardiovascular disease who are not the main food shopper for their household:
Previously diagnosed cardiovascular disease (history of prior acute coronary syndrome, revascularisation (prior PCI or CABG) or external angina)
Aged 40years and older

Group 2: Participants with cardiovascular disease who are also the main food shopper for their household (complete 50% or more of household shopping):
Previously diagnosed cardiovascular disease (history of prior acute coronary syndrome, revascularisation (prior PCI or CABG) or external angina)
Aged 40years and older
Shop at the supermarket for household food at least once per week spending $25 or more per household member
Own or have access to a smartphone for the next six weeks

Group 3: Participants who are main household shoppers only:
18 years or older
Shop at the supermarket for household food at least once per week spending $25 or more per household member
Own or have access to a smartphone for the next six weeks

Exclusion Criteria

Group 1: Participants with cardiovascular disease who are not the main food shopper for their household:
Unable to provide informed consent
Suffered a cardiac event in the past three months (defined as hospitalization for heart attack, coronary artery revascularisation (CABG or stenting), stroke or heart failure
Previously been diagnosed with heart failure or severe valve disease (including severe aortic or mitral valve disease)
On a physician supervised diet or unwilling to make dietary changes
Taking medication that may lead to hyponaetraemia or acute build up of body water such as: frusemide, regular NSAID, or regular prednisone use

Group 2: Participants with cardiovascular disease who are also the main food shopper for their household (complete 50% or more of household shopping):
Unable to provide informed consent
Suffered a cardiac event in the past three months (defined as hospitalization for heart attack, coronary artery revascularisation (CABG or stenting), stroke or heart failure
Previously been diagnosed with heart failure or severe valve disease (including severe aortic or mitral valve disease)
On a physician supervised diet or unwilling to make dietary changes
Taking medication that may lead to hyponaetraemia or acute build up of body water such as: frusemide, regular NSAID, or regular prednisone use
Currently using the FoodSwitch smartphone app or planning to use it over the next six weeks
Do not return at least two till receipts and spend $25 or more per week per household member on grocery shopping over the baseline period

Group 3: Participants who are main household shoppers only:
Unable to provide informed consent
Currently using the FoodSwitch smartphone app or planning to use it over the next six weeks
Do not return at least two till receipts and spend $25 or more per week per household member on grocery shopping over the baseline period

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Salt content of household food purchases (g/MJ) assessed using supermarket till receipts linked to a brand-specific food composition database (Nutritrack). [Change from baseline (weeks 1&2) to end of intervention (weeks 5&6)]