No registrations found.
ID
Source
Brief title
Health condition
Cardiovascular diseases; cardiometabolic health; type 2 diabetes.
Sponsors and support
Intervention
Outcome measures
Primary outcome
Changes in adherence to the Dutch Dietary Guidelines (i.e, DHD15-index) over 6 or 12 months compared with the control supermarkets.
Secondary outcome
Cardiometabolic outcomes (i.e., HbA1c, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, total cholesterol, total cholesterol/HDL-ratio, triglycerides and waist circumference), along with walking behaviours (i.e., step count) to evaluate effects of the mobile PA app, and intermediate behavioural factors including changes in food purchasing in the supermarket, food decision styles, social cognitive factors in relation to nudges and walking behaviours, customer satisfaction over 6 or 12 months, and acceptance of nudges and technology at 6 or 12 months, all compared with the control arm. In addition the reflexive monitoring will result in a strategic roadmap identifying systemic barriers and facilitators, as well as strategies to overcome identified barriers for future supermarket-based health interventions.
Background summary
In the Supreme Nudge project, we will study the effects of pricing and nudging strategies in the supermarket – one of the most important point-of-choice settings for food choices – and of a context-specific mobile physical activity promotion app.
The Supreme Nudge trial includes nudging and pricing strategies cluster-randomised on the supermarket level, with: i) control group receiving no intervention; ii) intervention group receiving healthy food nudges (e.g., product placement or promotion) and pricing strategies (taxing of unhealthy foods and subsidizing healthy foods). In collaboration with a Dutch supermarket chain we selected eight stores located in low SEP neighbourhoods.
Across the clusters, a personalized mobile coaching app targeting moderate physical activity (walking behaviour) will be individually-randomised, with: i) control group receiving no intervention; ii) a group receiving the mobile PA app intervention.
The primary outcome is the mean individual change in adherence to the Dutch Dietary Guidelines. Secondary outcomes include cardiometabolic outcomes, and the number of steps per day, healthy food purchasing in the supermarket, food decision styles, social cognitive factors in relation to nudges and in relation to walking behaviours, supermarket customer satisfaction, at 3, and 6 (and 12; depending on participant enrolment date) months and technology acceptance and acceptance of nudges at 6 and 12 months.
The trial is reflexively monitored to support current and future implementation. The findings can guide future research and public health policies on reducing lifestyle related health inequalities and contribute to a supermarket-based health interventions implementation roadmap.
Study objective
Changing the context in which individuals make lifestyle choices has a sustained impact on the dietary intake and cardiometabolic health.
Study design
The intervention phase will be 6 or 12 consecutive months (depending on participant enrolment date) to account for seasonal variation in shopping and physical activity behaviour and allow measurement of long-term effects. The short-term (3 months) measurements will be used to measure changes in behaviours and intermediate psychological constructs, whereas the longer term follow up (6 and 12 months) will be used to evaluate changes in dietary intake, and for the process-evaluation.
Intervention
This cluster-randomised controlled trial will implement nudging and pricing strategies on the supermarket level, using two trial arms:
- control group receiving no intervention;
- intervention group receiving healthy food nudges and pricing strategies.
An mHealth PA coaching app will be implemented and randomised at the individual level across all supermarket level clusters to prevent clustering of mHealth participants within store locations:
- control group receiving a step count app for tracking of step count data;
- an intervention group receiving the step count app plus the PA coaching app.
Joreintje Mackenbach
De Boelelaan 1089a
Amsterdam 1081 HV
The Netherlands
0031 (0)6 48623120
supremenudge@amsterdamumc.nl
Joreintje Mackenbach
De Boelelaan 1089a
Amsterdam 1081 HV
The Netherlands
0031 (0)6 48623120
supremenudge@amsterdamumc.nl
Inclusion criteria
Potential participants have to meet all of the following criteria in order to be eligible for study inclusion:
- Living in the low SEP neighbourhood surrounding the selected store;
- Aged 30-80 years;
- Self-report to do (or report their partner does) more than half of the household grocery shopping at the selected supermarket and are planning on continuing visiting for the next year;
- Provide written informed consent.
In order to be eligible for additional inclusion in the PA coaching app intervention, a participant must indicate to own a smartphone and use it for text messaging on a regular basis.
Exclusion criteria
Potential participants who are not able to adequately communicate in the Dutch language will be excluded from the study. Those who are unable to climb a flight of stairs or have a contra-indication to engage in light PA will be excluded from the mobile PA app intervention.
Design
Recruitment
IPD sharing statement
Plan description
Followed up by the following (possibly more current) registration
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Other (possibly less up-to-date) registrations in this register
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In other registers
| Register | ID |
|---|---|
| NTR-new | NL7064 |
| NTR-old | NTR7302 |
| Other | Hartstichting : CVON2016-04 |
Summary results
Lakerveld J, Mackenbach JD, de Boer F et al. (2018) Improving cardiometabolic health through nudging dietary behaviours and physical activity in low SES adults: design of the Supreme Nudge project. Bmc Public Health 18.