Evaluation of a Personalised Digital Intervention (EviBody) for Healthy and Sustained Lifestyle Behaviors and Well-being Among Adults: a Real-world Quasi-experimental Study
Effectiveness and Theory-based Evaluation of a Personalised Digital Intervention (EviBody) for Healthy and Sustained Lifestyle Behaviours and Well-being Among Adults
1 other identifier
observational
1,500
1 country
1
Brief Summary
The goal of this quasi-experimental observational study is to evaluate the impact of a personally tailored digital intervention aimed to support a healthy lifestyle on well-being, lifestyle behaviors, and mental health among the adult population. The main questions it aims to answer are: I) Is a digital intervention developed to offer personalised digital support for healthy habits effective in improving well-being compared to a control group from the general population after 6 months? II) Is the effectiveness dose-dependent (better effect with higher membership level)? III) Does the digital intervention assist in maintaining healthy eating and physical activity habits, mental health, and well-being across 24 months? IV) Are sociodemographic factors associated with achieving the self-identified goals and improvements in eating and physical activity habits, mental health, and well-being? VI) Do engagement, motivation, self-efficacy, and perceived barriers mediate the associations between sociodemographic characteristics and changes in self-identified goals, eating and physical activity habits, mental health, and well-being over a 24-month period? V) How is the pattern of user engagement across 24 months? Participants are users of the mobile phone application EviBody. The group will be compared with individuals from the general population to evaluate if the digital intervention is effective in improving well-being, eating and physical activity habits, and mental health.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for all trials
Started Jan 2026
Typical duration for all trials
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
July 8, 2023
CompletedFirst Posted
Study publicly available on registry
August 2, 2023
CompletedStudy Start
First participant enrolled
January 1, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
December 31, 2026
ExpectedStudy Completion
Last participant's last visit for all outcomes
December 31, 2028
April 29, 2026
April 1, 2026
12 months
July 8, 2023
April 23, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (2)
Well-being
Well-being will be assessed by the WHO-5 Well-Being Index. The WHO-5 comprises the following five items: being cheerful and in good spirits; being calm and relaxed; feeling active and vigorous; feeling fresh and rested when waking up in the morning; and having an interest in day-to-day activities. Six response alternatives are scored from 5 (All of the time) to 0 (At no time). The total raw score which ranges from 0 to 25 is multiplied by 4 to calculate the final score. The final score range goes from 0 = worst imaginable well-being to 100 = the best imaginable well-being.
6 months
Well-being
Well-being will be assessed by the WHO-5 Well-Being Index. The WHO-5 comprises the following five items: being cheerful and in good spirits; being calm and relaxed; feeling active and vigorous; feeling fresh and rested when waking up in the morning; and having an interest in day-to-day activities. Six response alternatives are scored from 5 (All of the time) to 0 (At no time). The total raw score which ranges from 0 to 25 is multiplied by 4 to calculate the final score. The final score range goes from 0 = worst imaginable well-being to 100 = the best imaginable well-being.
24 months
Secondary Outcomes (6)
Stress
6 months
Burnout
6 months
Sleep
6 months
Stress
24 months
Burnout
24 months
- +1 more secondary outcomes
Other Outcomes (10)
Goal achievement
6 months
Dietary habits
6 months
Physical activity
6 months
- +7 more other outcomes
Study Arms (4)
Intervention group- Basic
Subjects with behavioral support from the app EviBody
Intervention group- Standard
Subjects with behavioral support from the app EviBody + social support
Intervention group- Premium
Subjects with behavioral support from the app EviBody + social support + individual coaching
Control group
No exposure
Interventions
The app EviBody with three core subjects: 1\) a Healthy eating, 2) Physical activity, and 3) Mental balance. The intervention includes tracking and self-monitoring of behaviors, goal setting, action planning, feedback and digital rewards, an AI chat, a database with food recipes, a database with exercises, inspiration, and skills training webinars.
The digital service EviBody with three core subjects: 1\) a Healthy diet, 2) Physical activity, and 3) Mental balance. The service includes tracking and self-monitoring of behaviors, goal setting, action planning, feedback and digital rewards, an AI chat, a database with food recipes, a database with exercises, inspiration, and skills training webinars. Users with the membership Standard are also offered a community with social support.
The digital service EviBody with three core subjects: 1\) a Healthy diet, 2) Physical activity, and 3) Mental balance. The service includes tracking and self-monitoring of behaviors, goal setting, action planning, feedback and digital rewards, an AI chat, a database with food recipes, a database with exercises, inspiration, and skills training webinars. Users with the membership Premium are also offered a community with social support plus private on-line health consultations. The number of private health consultations is 3 for a 3 months subscription, 4 for a 6 months subscription, and 6 for a 12 months subscription.
Eligibility Criteria
Intervention: Adults signing up for a digital intervention that is supporting a healthy lifestyle. Control: Adults of the general population.
You may qualify if:
- adults ≥18 years
- signing up for the app EviBody using electronic identification
- consent to the research study
- adults ≥18 years
- consent to the research study
You may not qualify if:
- individuals who are discharged from the app due to refracting the terms of the service,
- is currently using a digital product that is explicitly designed to support behaviour change,
- subjects scoring \>70 on well-being will be excluded from the primary analyses,
- subjects who appear as friends, colleagues, or family with anyone in the research or owner group will be excluded.
- is currently using a digital product that is explicitly designed to support behaviour change,
- is found to be a user of EviBody,
- subjects scoring \>70 on well-being will be excluded from the primary analyses,
- subjects who appear as friends, colleagues, or family with anyone in the research or owner group will be excluded.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Sophiahemmet Universitylead
- Karolinska Institutetcollaborator
- Stockholm Universitycollaborator
- The Swedish School of Sport and Health Sciencescollaborator
- Linnaeus Universitycollaborator
Study Sites (1)
Sophiahemmet University
Stockholm, Sweden
Related Publications (1)
Rossen J, Anderbro T, Andermo S, Bergman P, Hagstromer M, Jacobsson M, Johansson UB, Kallings L, Lonn A, Regan C, von Rosen P. Effectiveness and theory-based evaluation of a personalised digital intervention (EviBody(R)) for healthy and sustained lifestyle behaviours and well-being among adults: Study protocol for a real-world quasi-experimental study. PLoS One. 2025 Oct 7;20(10):e0333201. doi: 10.1371/journal.pone.0333201. eCollection 2025.
PMID: 41056320DERIVED
Related Links
MeSH Terms
Conditions
Study Officials
- PRINCIPAL INVESTIGATOR
Jenny Rossen, PhD
Sophiahemmet University
Central Study Contacts
Study Design
- Study Type
- observational
- Observational Model
- OTHER
- Time Perspective
- PROSPECTIVE
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
July 8, 2023
First Posted
August 2, 2023
Study Start
January 1, 2026
Primary Completion (Estimated)
December 31, 2026
Study Completion (Estimated)
December 31, 2028
Last Updated
April 29, 2026
Record last verified: 2026-04