About this trial
This pilot study will focus on men and women aged ≥60 years for a period of 3 months during which each participant will use the HLRS. The primary purpose is to study whether the HLRS, reflecting a multi-component intervention, is well accepted by the participant, has a decent adherence (i.e., user time of the app). In addition, investigators will study the feasibility of the design, i.e. whether the overall design is well suited to the participants, in order to improve their lifestyle, e.g., dietary habits and PA, among others. Secondary outcomes related to the feasibility approach include dietary habits, PA patterns, and selected plasma and urinary endpoints. This pilot study will be of longitudinal design without a control group. A later trial that is planned for the following year will focus further on biological endpoints and will be randomized. In this present pilot study, investigators aim to assess mainly the user-friendliness of the HLRS, and gather first evidence that the intervention can indeed produce healthier lifestyle patterns.
The study's primary objective is to determine whether the developed HLRS can be successfully applied to the target population (men and women aged ≥60 years) and whether they use it frequently during the study and are satisfied with the HLRS.
Secondly, investigators will study whether the assessment of endpoints required for the later and separately planned ensuing long-term study can be well assessed within the study and if, despite the limited time of the intervention duration, the intervention will be able to preliminary improve specific markers related to the risk of obesity and associated comorbidities. This will entail anthropometric measures to assess changes in body mass and body fat in addition to the primary and secondary objectives.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
both males/females, general free-living population,
residing in Luxembourg,
having normal weight or being overweight, i.e., with a BMI between 18.5 ; 30 kg/m², which is considered a risk factor for developing obesity,
owning a smartphone.
Disqualifiers
With known manifest chronic diseases that prohibits participation in the study (e.g., cancer, Parkinson's),
Persons with cognitive diseases (Alzheimer's) or those who are not able to lead an independent life,
Persons following a strict diet (on their own or advised by their physician),
Particular population groups, such as prisoners, the mentally disabled, or groups whose ability to give voluntary informed consent may be in question.
Trial design
Single group
Treatments tested in this trial
Investigators will evaluate the acceptance and adherence to a healthy lifestyle recommender solution (HLRS), a digital app, among participants
Other interventionThe intervention will include collecting blood, stool, urinary samples as well as measuring anthropometrics and collecting data (socio-demographics, general health, well-being, PA, and eating patterns, among others) via questionnaires completed in part from a mobile application.
Treatment groups
Trial outcomes
Primary outcomes
Health Lifestyle Recommender System adherence time
Adherence time (daily and weekly usage time in minutes) will be measured by tracking through user log-data, with analysis of any significant changes in usage comparing baseline with final measurement.
Health Lifestyle Recommender system user experience
User experience corresponds to the points achieved in the User Experience Questionnaire (UEQ+, 26 items). This questionnaire analyses the attractiveness, perspicuity, efficiency, dependability, stimulation and novelty of a new product (in this case HLRS). The UEQ contains 26 items. Each item is evaluated with a 7-point Likert scale (-3 to 3 points). Then the product is classified as excellent (3 points) or bad (-3 points).
Secondary outcomes
Anthropometric measurements (1/4)
Body mass index (kg/m\^2) will be calculated with weight (kg) and height (m).
Anthropometric measurements (2/4)
Waist and hip circumference (cm) measure and thigh circumference (cm) obtained with a tape
Anthropometric measurements (3/4)
Body fat percentage determined by a bioelectrical impedance scale (Tanita)
Anthropometric measurements (4/4)
Visceral body fat (cm2) determined by anthropometric measurements including weight, height, waist circumference and thigh circumference (https://www.lih.lu/en/visceral-fat-calculator/).
Sponsors and contacts
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Luxembourg Institute of Health
Lead sponsor
European Commission
Collaborator