Using mobile technology to support lower-salt food choices for people with cardiovascular disease: protocol for the SaltSwitch randomized controlled trial

BMC Public Health

Cliona Ni Mhurchu¹  Yannan Jiang¹  Robert N Doughty³  Bruce Neal²  Rebecca McLean¹  Helen Eyles¹ 

[1] National Institute for Health Innovation, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand;George Institute for Global Health, University of Sydney, PO Box M201, Missiden Road, Sydney, NSW 2050, Australia;Dept of Medicine, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand

关键词: Secondary prevention;    Self-care;    Telemedicine;    Smartphone;    Cellular phone;    Sodium;    Salt;    Heart diseases;    Cardiovascular diseases;   

Others  :  1127046
DOI  :  10.1186/1471-2458-14-950

 received in 2014-09-03, accepted in 2014-09-10,  发布年份 2014

【 摘 要 】

Background

Cardiovascular disease (CVD) is the leading cause of early death worldwide, responsible for an estimated 29% of all global deaths. Reducing salt intake lowers blood pressure and risk of secondary cardiac events. However, identifying low salt foods can be challenging. SaltSwitch is a simple smartphone application (app) that enables shoppers to scan the barcode of packaged foods and receive an immediate, interpretive, traffic light nutrition label on the screen, along with suggestions for healthier lower-salt alternatives. A growing body of evidence suggests mobile technologies can support healthy behaviour change. However, robust evidence for the impact of smartphone interventions is lacking. This manuscript outlines the rationale and methods for a randomized controlled trial designed to determine the effectiveness of SaltSwitch in supporting people with CVD to make lower-salt food choices.

Design/Methods

A 6-week, two-arm, parallel, randomized controlled trial is being undertaken in New Zealand (2 weeks baseline and 4 weeks intervention). Three hundred adults aged 40 years and older with CVD and their main household shoppers are recruited from research lists, cardiac rehabilitation clinics, and communities in Auckland. Participants are randomized to receive either the SaltSwitch smartphone app or no intervention (control). Randomisation is stratified by ethnicity and age. The primary outcome is the salt content of household food purchases. Secondary outcomes are the saturated fat and energy content of household food purchases, household food expenditure, use and acceptability of the SaltSwitch app by shoppers, and urinary sodium and blood pressure of participants with CVD. Ambulatory blood pressure and potential longer-term impact (12 weeks) of SaltSwitch will be assessed in sub-studies (n ~ 40 and n ~ 20, respectively). Household purchases of salt and other nutrients will be assessed using till receipt data electronically linked with branded food composition data.

Discussion

The results of the SaltSwitch trial will determine the effectiveness, use and acceptability of a smartphone application to support lower salt food choices and secondary prevention of CVD.

Trial registration

ACTRN12614000206628. Registered 30 March 2014.

【 授权许可】

   
2014 Eyles et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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