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Table 2 Summary of the features of digital interventions grouped according to effectiveness

From: Digital behaviour change interventions to increase vegetable intake in adults: a systematic review

Author and year

Control

Intervention features

Intervention

NOURISHING policy domain and policy area

Digital tool

Co-designa

Behaviour change theory

Personalisation

Effective

       

Bhurosy 2020 [35]

Self-monitoring of diet

Self-monitoring of diet, including red/orange vegetable intake, set a goal to eat 1 more, take pictures of serves

Domain: BCC

Policy: nutrition education and skills

App

 

Assigned goal setting

 

Cantisano 2022 [56]

 

ePSICONUT programme – eHealth tools (Headspace, Insight Timer, Fabulous, YouTube channel, WhatsApp, e-mail, and Excel sheets to perform tasks/activities)

Domain: BCC

Policy: nutrition education and skills

App, SMS messages, videos, email, Excel

Not true co-design: researchers and health professionals

Goal setting

 

Chan 2020 [38]

Generalised dietary and PA advice

TrueNTH Community of Wellness—educational material, links to resources, self-monitoring diet and PA

Domain: BCC

Policy: nutrition education and skills; nutrition advice and counselling

Website, Fitbit, SMS messages, phone calls

 

Social cognitive theory, goal setting

Diet and PA advice, videos and reports, exercise trainer and dietitian, dashboard

Gilson 2017 [42]

 

Jawbone UP™—financial incentives program. Education materials and self-monitoring PA and healthy dietary choices, and financial incentives for changing behaviours

Domains: BCC; food environment

Policies: nutrition education and skills; economic tools to address affordability and purchase incentives

App, activity tracker

 

Goal setting

Support and feedback from researchers on goals

Hansel 2017 [44]

Generalised dietary advice

ANODE—dietetic tool providing menus, shopping list, recipes, PA prescribed

Domain: BCC

Policy: nutrition education and skills; nutrition advice and counselling

Website

  

Menus, shopping list based on preferences, tastes, calories, needs

Hendrie 2020 [58]

 

VegEze – motivation and education to increase intake and variety, self-monitoring, gamification, > 50 recipes and meal suggestions

Domain: BCC

Policy: nutrition education and skills

App

Not true co-design: dietitians, researchers, product developers, software engineers, adults (25–45 y)

Behaviour change wheel; motivation, goal setting, self-monitoring, social comparison, gamification

Feedback and motivational messages for meeting goals

Plaete 2015 [60]

Generalised information

MyPlan 1.0—motivation and education to improve behaviour (group 1 and 2 were recruited by GPs and researchers respectively)

Domain: BCC

Policy: nutrition education and skills

Website

Not true co-design: researchers, general practitioners

Self-regulation, health action process, goal setting

Feedback on health behaviours, action plan

Wang 2021 [54]

Health education

WeChat—health education, self-monitoring, reminders, diet, sport advice and supervision

Domain: BCC

Policy: nutrition education and skills

App

 

Trans-theoretical

Model

Dietitians, sports coach advice, health reports

Wang 2020 [55]

Text messages on general health information

Text messages covering health awareness, diet control, PA, living habits, weight control

Domain: BCC

Policy: nutrition education and skills; nutrition advice and counselling

SMS messages

Not true co-design: endocrinology, chronic disease, health education, disease prevention experts

Trans-theoretical

Model

 

Ineffective

       

Abu-Saad 2019 [33]

Standard lifestyle counselling

Interactive Lifestyle Assessment, Counselling, and Education (I-ACE)—self-monitoring of dietary intake and PA, dietitian-delivered lifestyle education and advice

Domain: Behaviour Change Communication (BCC)

Policy: nutrition education and skills; nutrition advice and counselling

App

Not true co-design: adults, dietitians

Motivational interviewing, goal setting

Clinical counselling to improve diet based on diet, ethnicity, culture, age, health status

Alonso-Dominguez 2019 [34]

Generalised dietary and PA advice

EVIDENT II—self-monitoring diet and PA, in-person food/cooking workshops, walks

Domain: BCC

Policy: nutrition education and skills; nutrition advice and counselling

App

Not true co-design: software engineers, dietitians, PA experts

 

Diet and PA advice based on diet, PA, age, sex, weight, height, stride

Bozorgi 2021 [36]

Usual care

Education and support information on disease management, healthy diet (DASH and low-salt diet), weight loss and motivational messages

Domain: BCC

Policy: nutrition education and skills; nutrition advice and counselling

App

  

Messages based on patient characteristics

Brown 2014 [37]

Brochure containing same information

Mobile MyPlate—behavior-directed motivational text

messages on the US Dietary

Guidelines and messages of the My-Plate icon

Domain: BCC

Policy: nutrition education and skills

App, SMS messaging

Not true co-design: nutrition and health societies, industry, department of agriculture and health and human services

Goal setting

 

Celis-Morales 2016 [57]

Generalised dietary advice

Food4Me—self-monitoring of diet and PA, three levels of feedback report: Level 1: based on diet data; Level 2: based on diet and phenotype data; Level 2: based on diet, phenotype and genotype data

Domain: BCC

Policy: nutrition education and skills; nutrition advice and counselling

Website, internet forum, accelerometer

 

Behaviour change wheel; motivation, self-monitoring, assigned goal setting

Diet advice based on diet, phenotype (anthropometric; blood biomarkers) and/or genotype (5 nutrient-responsive genes)

Debon 2020 [39]

Health education workshops

Health education workshops. Self-monitoring of physical measurements, (e.g. blood pressure, anthropometrics, sleep, mood, PA). Recommendations based on reference values. Alerts and reminders

Domain: BCC

Policy: nutrition education and skills; nutrition advice and counselling

App

 

Goal setting

Advice based on reference values, dashboard summary of health conditions

Elbert 2016 [40]

No health information

Text- or audio-based tailored health information, recipes, testimonials

Domain: BCC

Policy: nutrition education and skills

App

 

Social cognitive theory, goal setting

Action plan, testimonial matching, advice based on current diet, barriers to fruit and vegetable intake and health

Fjeldsoe 2019 [41]

Brief written feedback

Get Healthy, Stay Healthy (GHSH)—extended contact intervention with text messages and phone calls with coach

Domain: BCC

Policy: nutrition education and skills

SMS messages

 

Goal setting

Diet and PA goals, frequency of goals and texts, phone coaching

Goni 2020 [43]

Usual clinical care

PREDIMAR—nutrition education on the Mediterranean diet, self-monitoring of diet, recipes

Domain: BCC

Policy: nutrition education and skills; nutrition advice and counselling

Website, app, printed resources, phone calls, cooking videos, testimonials

Not true co-design: dietitians, nutritionists,

epidemiologists, doctors, chefs, programmers

 

Dietary advice by a dietitian

Hebden 2014 [45]

Booklet from dietitian

Booklet, text messages, emails, app and forums, recipes, self-monitoring diet and PA

Domain: BCC

Policy: nutrition education and skills

SMS messages, e-mails, app, Internet forums

 

Transtheoretical model

Motivational advice and instantaneous diet and PA feedback based on guidelines, dietitian access

Jahan 2020 [46]

Brochure on health education

Health education on DASH, PA, generalised text messages on recommendations

Domain: BCC

Policy: nutrition education and skills; nutrition advice and counselling

SMS messages

   

Kerr 2016 [52]

Self-monitoring without feedback

Connecting Health and Technology (CHAT)—text messages, self-monitoring and feedback on diet using images, web links and recipes

Domain: BCC

Policy: nutrition education and skills

SMS messaging, app

Not true co-design: young adults (18–30 y)

Self-determination

Feedback based on diet, name

Lara 2016 [47]

Usual care

Living, Eating, Activity and Planning through retirement (LEAP)—information on healthy eating (Mediterranean diet), recipes, PA, social roles, self-monitoring

Domain: BCC

Policy: nutrition education and skills

Website

True co-design: researchers, adults (> 55 y), health social care professionals

Health action process, goal setting

Content based on demographics, diet and goals, dashboard summary

Lombard 2016 [48]

Generalised health session

HeLP-her—self-management education manual, group session, phone coaching, text messages

Domain: BCC

Policy: nutrition education and skills

SMS messages, phone coaching

 

Self-determination, cognitive behavioural, motivational interviewing, goal setting

Diet and PA goals and action plan, by name, coaching

Perez-Junkura 2022 [59]

 

GlutenFreeDiet platform—dietary evaluation, which allows dietitians to measure energy content and nutrient distribution

Domain: BCC

Policy: nutrition education and skills; nutrition advice and counselling

Website, app counselling

  

Feedback based on diet

Pope 2019 [49]

Identical, Facebook

Facebook group, self-monitoring diet and PA with smartwatch

Domain: BCC

Policy: nutrition education and skills

App, smartwatch

 

Social cognitive, self-determination

 

Recio-Redruguez 2016 [50]

Generalised information

Diet and PA counselling, leaflet, self-monitoring diet and PA

Domain: BCC

Policy: nutrition education and skills

App, counselling

Not true co-design: dietitians, PA experts, software engineers

 

Feedback and plan based on diet and PA

Schulz 2014 [51]

Health risk appraisal

MyHealthyBehavior—health risk appraisal, feedback to improve diet, alcohol, PA, smoking (sequentially or simultaneously)

Domain: BCC

Policy: nutrition education and skills

Website

  

Feedback based on diet, PA, smoking, by name

Turner-McGrievy 2013 [53]

Podcast

Podcast, self-monitoring diet and PA, social support

Domain: BCC

Policy: nutrition education and skills

Podcast, app

 

Social cognitive theory, goal setting

 

Williams 2022 [61]

Static text-based messages and letter from GP

Diabetes Online Risk Assessment (DORA) study—video-based story (80–144 s in duration), links to reputable healthy lifestyle resources (e.g. Nutrition Australia)

Domain: BCC

Policy: nutrition education and skills; nutrition advice and counselling

Website, video, SMS messages

 

Health belief model

Video based on individual T2DM risk factors, gender, and age

Zenun Franco 2022 [62]

Generalised dietary advice via the eNutri web app

EatWellUK study—personalised dietary advice via the eNutri web app

Domain: BCC

Policy: nutrition advice and counselling

App

Not true co-design: adults (18 y and over), nutrition professionals

 

Dietary advice based on current diet

  1. Abbreviations:BL baseline, BMI body mass index, CG control group, d. day, DASH Dietary Approaches to Stop Hypertension, FG food groups, IG intervention group, mo month, m-AHEI modified-alternative healthy eating index, NA not available, NS non-significant, PA physical activity, RCT randomized controlled trial, S significant, SSB sugar-sweetened beverages, T2DM type 2 diabetes mellitus, wk week, y year
  2. a Design and development input from stakeholders identified as true co-design only if the study used this the term “co-design”