Table 1 Final search strategy

Digital health intervention

TI ("wireless" or "electronic health" or ehealth or "e-health" or mhealth or "m-health" or “mobile health” or “digital health” or “interactive health communication*” or telehealth or ICT or “information technolog*” or "communication technolog*" or “health application*” or app or apps or “mobile* application*” or “smartphone* application*” or “web application*” or “computer-based” or “computer based” or online or “web-based” or “web based” or “web access” or "internet-based" or "internet based" or "internet-deliver*" or "internet deliver*" or “technology-enabled” or “technology enabled” or “technology-based” or “technology based” or “mobile technolog*” or “technology-supported” or “technology supported” or “technology-integrated” or “technology integrated” or “interactive technolog*” or telecare or telemedicine or telecommunication* or “video calling” or wearable or wearables or tracker or “monitoring device*” or “digital game*” or “online game*” or “mobile game*” or “video game*” or “text messag*” or SMS or “short message service*” or "multimedia messaging service" or MMS or “text-based” or “text based” or “social media*” or new media* or “participatory media*” or tablet* or ipad* or “e-mail*” or email* or website* or “world wide web” or "mobile phone*" or "mobile device*" or smartphone* or "cell phone*" or "cellular phone*" or “personal digital assistant*” or PDA* or “computer-assisted” or “computer assisted” or “online learning” or “virtual realit*” or blog* or “online social network*” or “virtual*” or “chatbot*” or “software” or “digital assistant*” or “embodied agent*” or “embodied conversational agent*” or “interactive agent*” or “interface agent*” or “artificial agent*” or “computer-tailored” or “computer tailored” or “mobile communication*” or “web communication*”)

Dietary behaviour

AND TI (diet* or nutrition* or eating or “consumption” or "food intake" or “food pattern*” or “food habit*” or intake or foods or vegetable* or fruit* or wholegrain or legume* or nut* or dairy or fish or tea or fat* or oil* or coffee or “red meat” or “processed meat” or “sweetened beverage*” or “juice*” or alcohol* or salt* or snack* or energ* or calor* or sugar* or carbohydrate* or fiber* or protein* or nutrient* or micronutrient* or macronutrient* or vitamin* or calcium or chromium or copper or iron or magnesium or manganese or molybdenum or potassium or sodium or zinc or iodine or selenium or fluoride or phosphorus or chloride)

Low SEP

AND AB (“socio-economic” or “socioeconomic” or sep or ses or poverty or income* or “social class*” or “social status” or unemployed or unemployment or job* or employment* or occupation* or “blue-collar” or “blue collar” or “low education” or “low-educat*” or “education level*” or “years of education” or “years of schooling” or disadvantaged or deprived or underprivileged or “social inequalit*” or “social inequit*” or “social disparit*”)