The population from Mediterranean countries is abandoning the Mediterranean diet (MD) traditional dietary and lifestyle pattern moving to unhealthier habits because of profound cultural and socio-economic driven lifestyle changes. Families, particularly parents, are responsible for structuring children's early experiences with food and eating as well as for transmitting knowledge of the MD. Educational family approaches can not only lead to more solid food literacy and healthy habits for children in the family but can also improve dietary profiles for adults, thus preventing future health-related problems. There is a lack of adequate study protocol for inducing a positive dietary, environmental and lifestyle behaviour in the family setting. SWITCHtoHEALTHY study aims to evaluate the effects of a multi-component nutritional intervention deployed at family level on the adherence to the MD pattern in families from three Mediterranean countries. A parallel, randomized, single blind controlled multicentric nutritional intervention study will be conducted in 480 families with children and adolescents among 3-17 years from Spain, Morocco, and Turkey over 13 months. Specifically, 160 families per country will be enrolled in a multi-component intervention and allocated to use digital interactive tools, hands-on educational materials and activities for adolescents, easy-to-eat healthy plant-based snacks for children, or a combination of two or three of the components. There will also be a control group that will receive general advice on healthy eating. The intervention study is scheduled to begin in November 2023. Through the digital tools the parents will use an interactive App through which they will receive personalized weekly meal plans while the engagement of all the family will be prompted by using a life simulation game. A set of activities for adolescents based on a learning-through-play approach to be carried out within the family and at school will be developed by adolescents and voluntary schoolteachers through co-creation sessions. The innovative and sustainable plant-based snacks will be produced by local food companies and introduced in the children dietary plan as healthy alternatives for between meals. By using a full-factorial design, the independent and combined effects of each intervention component will be tested by comparing the 7 intervention groups with the control group.
The main outcome will be adherence to the MD assessed through MEDAS and KIDMED validated questionnaires in parents and children respectively. The effectiveness of the multi-component intervention will be evaluated by comparing the MEDAS and KIDMED scores between the control and intervention groups at baseline and at the end of the intervention.The secondary outcomes will include a set of anthropometrical, lifestyle, dietary and socio-economic indicators measured in all family members. Standardized protocols will be used for the collection of data in the three countries. All data will be collected and evaluated by professional researchers and registered by researchers or study participants in a web platform. Lifestyle, diet, and socio-economic indicators will be self-reported by means of adapted online questionnaires for parent, adolescent, and child. The study will be carried out in 2 phases: * Phase 1 (month 0 to month 9): the families will be included in the study, they will be assigned to the different intervention groups, and consumption patterns and lifestyle, diet, and socioeconomic indicators will be evaluated through specific questionnaires. In addition, the different educational materials, activities, digital interactive tools and healthy snacks will be developed prior to the start of the intervention study. * Phase 2 (month 10 to month 13): The intervention study will be deployed at family level. Each family will receive the educational materials, digital interactive tools and snacks developed in Phase 1 as assigned. In addition, anthropometric, lifestyle, dietary and socioeconomic indicators will be evaluated through questionnaires. Three visits will be performed along the study, including one pre-assessment at the beginning of Phase 1 (baseline, month 0), one visit at the beginning of Phase 2 (month 11) and one visit at the end of Phase 2 (month 13). The impact of the intervention on dietary factors, including MD adherence, diet quality, food intake and MD lifestyle habits, physical activity, and classical anthropometrical parameters, will be assessed in Phase 2 in a 3-month period. However, consumption behaviour and environmental and economic factors will be measured at the baseline (Phase 1) and at the end (Phase 2). The baseline point (month 0) is necessary to assess the aforementioned factors over the course of a year.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
480
Families which will use the digital interactive tools to empower parents in their daily dietary choices.
Families which will receive educational materials and adolescents will perform educational activities.
Families in which children will include the snacks in their diet.
Families which will use the digital interactive tools and receive educational material, and adolescents will perform educational activities.
Families which will use the digital interactive tools and children will include the snacks in their diet.
Families which will receive educational material, adolescents will perform educational activities, and children will include the snacks in their diet.
Families which will use the digital interactive tools and will receive educational material, children will include the snacks in their diet, and adolescents will perform educational activities.
Eurecat, Technological Center of Catalonia, Nutrition and Health Unit
Reus, Tarragona, Spain
Change in adherence to the Mediterranean Diet
The main outcome will be adherence to the MD measured through MEDAS questionnaire score in parents. The effectiveness of the multi-component intervention will be evaluated by comparing the MEDAS score between the control and intervention groups during the intervention period (Phase 2). The MEDAS score is an extension of a 9-point score developed in the Prevention with Mediterranean Diet (PREDIMED) trial. A score of 14 points means maximum adherence to the Mediterranean Diet while a score below 7 points means low adherence.
Time frame: Phase 2 (month 10 to month 13)
Change in adherence to the Mediterranean Diet
The main outcome will be adherence to the MD measured through KIDMED questionnaire score in children. The effectiveness of the multi-component intervention will be evaluated by comparing the KIDMED score between the control and intervention groups during the intervention period (Phase 2). The KIDMED score ranges from 0 to 12 points, so a score greater than or equal to 8 points means optimal Mediterranean Diet adherence while a score below or equal to 3 points means very low-quality diet, and between 4 and 7 points means that need to improve the eating pattern to fit the Mediterranean pattern.
Time frame: Phase 2 (month 10 to month 13)
Change in Body Mass Index values
BMI will be assessed by weight (kg) / height (m2) and using a body composition analyzer (Tanita). BMI values will be compared between control and intervention groups. Measured in all family members.
Time frame: Phase 2 (month 10 to month 13)
Change in waist circumference values
Waist circumference (cm) will be measured at the umbilicus level using an anthropometric steel measuring tape. The obtained values will be compared between control and intervention groups. Measured in all family members.
Time frame: Phase 2 (month 10 to month 13)
Change in blood pressure values
Systolic blood pressure and Diastolic blood pressure values (mmHg) will be monitored by using an automatic sphygmomanometer. The obtained results will be compared between control and intervention groups. Measured in all family members.
Time frame: Phase 2 (month 10 to month 13)
Change in resting heart rate values
Resting heart rate values (bpm) will be monitored by using an automatic sphygmomanometer. The obtained results will be compared between control and intervention groups. Measured in all family members.
Time frame: Phase 2 (month 10 to month 13)
Sociodemographic and socioeconomic data
Measured in parents and adolescents by an adapted questionnaire which will collect information regarding age, gender, household members, marital status, income, level of education and employment status.
Time frame: Phase 1 (baseline)
Social factors data
Measured in parents, adolescents, and children over 8 years by an adapted questionnaire which will collect information regarding work flexibility and satisfaction, work-life balance, lifestyle, time spent with children, family decision making, and task responsibility.
Time frame: Phase 1 (baseline)
Change in physical activity levels
Physical activity level will be measured by using the Physical Activity Questionnaires PAQ-C for children over 8 years. It consists of a 10-item validated scale. The resulting score ranges from 1 to 5. A score of 1 indicates low physical activity, whereas a score of 5 indicates high physical activity. The obtained scores will be compared between control and intervention groups.
Time frame: Phase 2 (month 10 to month 13)
Change in physical activity levels
Physical activity level will be measured by using the International Physical Activity Questionnaire (IPAQ) for adults (parents). It consists of a 7-item short form with open-ended questions surrounding individuals' last 7-day recall of physical activity. Results are reported as categories (low activity levels, moderate activity levels or high activity levels). The obtained results will be compared between control and intervention groups.
Time frame: Phase 2 (month 10 to month 13)
Change in quality of life
Quality of life will be measured by using the 5-level EQ-5D-5L scale (EuroQol Group) for adults (parents). The EQ-5D-5L essentially consists of 2 pages: the EQ-5D descriptive system and the EQ visual analogue scale (EQ VAS). The descriptive system comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems. The subject is asked to indicate his/her health state in each of the five dimensions. This decision results in a 1-digit number that expresses the level selected for that dimension. The digits for the 5 dimensions can be combined into a 5-digit number that describes the patient's health state. The obtained scores will be compared between control and intervention groups.
Time frame: Phase 2 (month 10 to month 13)
Change in quality of life
Quality of life will be measured by using the KIDSCREEN questionnaire for adolescents and children over 8 years. This scale measures 10 health-related quality of life dimensions: Physical- (5 items), Psychological Well-being (6 items), Moods and Emotions (7 items), Self-Perception (5 items), Autonomy (5 items), Parent Relations and Home Life (6 items), Social Support and Peers (6 items), School Environment (6 items), Social Acceptance (Bullying) (3 items), Financial Resources (3 items). The obtained scores will be compared between control and intervention groups.
Time frame: Phase 2 (month 10 to month 13)
Change in nutritional knowledge
Knowledge about food and nutrition will be measured using a short consumer-oriented nutrition knowledge questionnaire for adults. The questionnaire consists of a scale of 20 items where correct responses are scored as one, while incorrect responses, don't know-answers or blanks are scored as zero. The obtained final scores will be compared between control and intervention groups.
Time frame: Phase 2 (month 10 to month 13)
Change in nutritional knowledge
Knowledge about food and nutrition will be measured using the HELENA (Healthy Lifestyle in Europe by Nutrition in Adolescence) study questionnaire for adolescents. The questionnaire includes a total of 23 multiple-choice questions that can be categorized into specific subscales regarding knowledge of concepts (e.g. subscales 'Energy Intake and Energy Metabolism' or 'Physical Activity'), instrumental knowledge (e.g. subscale 'Nutrient Contents') and knowledge of causal relationships (e.g. subscales 'Sweeteners' or 'Oral Health'). Each question offers three possible answers (only one correct) and the 'don't know' category. Correct answers are scored as 1 and incorrect answers are scored as 0. Finally, the individual scores are summed up and calculated as a percentage of the total. The obtained final scores will be compared between control and intervention groups.
Time frame: Phase 2 (month 10 to month 13)
Change in the health factor
The health factor will be assessed by the General Health Questionnaire (GHQ). This questionnaire will ask different aspects related to health and healthy lifestyle such as sleeping habits, hospitalization, or prescribed medications. The obtained results will be compared between control and intervention groups. Measured in all family members.
Time frame: Phase 1 (month 0 to month 9) and Phase 2 (month 10 to month 13)
Change in Mediterranean Diet lifestyle habits
Measured in parents by the Mediterranean Lifestyle index (MEDLIFE), which will capture adherence to an overall Mediterranean healthy lifestyle. It consists of a 28-item questionnaire categorized into three blocks: (1) Mediterranean food consumption (15 items); (2) Mediterranean dietary habits (7 items); (3) Physical Activity, rest, social habits and conviviality (6 items). Each item is scored as 0 for not meeting the cutoff established for the item or 1 for meeting it, so that the complete MEDLIFE ranges from 0 to 28, with a higher value indicative of greater adherence to Mediterranean lifestyle. The obtained results will be compared between control and intervention groups.
Time frame: Phase 1 (month 0 to month 9) and Phase 2 (month 10 to month 13)
Change in diet quality
Diet quality will be measured by using the Healthy Diet Index (HDI) for adults. It consists of seven weighted domains (meal pattern, grains, fruit and vegetables, fats, fish and meat, dairy, snacks, and treats). Within each domain, increasing points indicate a more healthy diet. The maximum total HDI is set at 100 points. The obtained results will be compared between control and intervention groups.
Time frame: Phase 1 (month 0 to month 9) and Phase 2 (month 10 to month 13)
Change in diet quality
Diet quality will be measured by using the KIDMED questionnaire for adolescent and children. The KIDMED score ranges from 0 to 12 points, so a score greater than or equal to 8 points means optimal diet quality while a score below or equal to 3 points means very low-quality diet, and between 4 and 7 points means that need to improve the eating pattern. The obtained score will be compared between control and intervention groups.
Time frame: Phase 1 (month 0 to month 9) and Phase 2 (month 10 to month 13)
Change in attitudes and beliefs in relation to food
Measured by an adapted questionnaire for parents. This questionnaire measures how the household income, parents' time spent with children, and parents' work experiences affect children's energy and fat intake and obesity-related outcomes. The obtained results will be compared between control and intervention groups.
Time frame: Phase 1 (month 0 to month 9) and Phase 2 (month 10 to month 13)
Change in consumption behavior
The consumption patterns will be assessed by means of family weekly food purchases, food intakes and food waste. The food purchases will be monitored by family unit using shopping tickets collected for 1 week. The food intake will be measured in all family by a 7-day semi-weighted food record. The food waste will be calculated as the difference between families food purchases and consumption considering the initial and final food inventories. Food storage sheets will be used to estimate the balance between food purchased and stored at home.
Time frame: Phase 1 (month 0 to month 9) and Phase 2 (month 10 to month 13)
Change in environmental impact
The environmental impact of food consumption will be assessed of the overall study and the intervention. The consumption quantities will be converted into kg of CO2 emission, land use and water footprint using existing tables in the literature on the environmental impacts of different food groups.
Time frame: Phase 1 (month 0 to month 9) and Phase 2 (month 10 to month 13)
Change in economic impact
The economic impact of the overall study and the intervention will be estimated using the family shopping tickets. We will evaluate whether the interventions lead to any change in family food expenditures.
Time frame: Phase 1 (month 0 to month 9) and Phase 2 (month 10 to month 13)
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