The LvL UP Trial: Assessing the Effectiveness of a mHealth Intervention
NCT ID: NCT06592443
Last Updated: 2026-01-28
Study Results
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Basic Information
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COMPLETED
NA
1061 participants
INTERVENTIONAL
2024-10-21
2026-01-26
Brief Summary
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LvL UP is a mHealth intervention aimed at preventing NCDs and CMDs in adults from multi-ethnic Southeast Asian populations. Building upon leading evidence- and theory-based frameworks in the areas of mental health and behaviour change, a multidisciplinary team of researchers developed LvL UP as a holistic intervention centred around three core pillars: Move More, Eat Well, Stress Less.
This study is aimed at (i) evaluating the effectiveness and cost-effectiveness of LvL UP, an mHealth lifestyle intervention for the prevention of NCDs and CMDs, and (ii) establishing the optimal blended approach in LvL UP that balances effective personalized lifestyle support with scalability.
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Detailed Description
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* Visit the study site at baseline and month 6 to complete assessments.
* Complete online assessments at months 1, 3, 9 and 12.
* Be assigned to group 1 (intervention) or group 2 (comparison).
* Participants in group 1 will download the LvL UP App.
* Participants in group 1 categorized as non-responders; at month 1 will start receiving six motivational interviewing coaching sessions in addition to continue using the LvL UP app (LvL UP + MI).
* Participants in group 2 will receive a package with standard lifestyle resources from Singapore Health Promotion Board.
Participants will be randomly allocated to groups 1 or 2 (LvL UP or comparison) following a 2:1 ratio favoring the LvL UP group. At month 1 (decision point), participants from the LvL UP group will be classified as responders or non-responders based on pre-specified criteria. Non-responder participants will be re-randomized with equal probability (1:1) to one of the two second-line conditions: (i) continuing with the initial intervention (LvL UP) or (ii) additional MI support sessions (LvL UP + MI). The LvL UP pilot study results (NCT06360029) will be used to inform the tailoring variable(s) for the trial (i.e., to define response / non-response at month 1). Engagement and app evaluation variables (e.g., number of app components completed over the first 4 weeks, net promoter score), preliminary intervention effects (e.g., initial positive response), or a combination of the two will be used.
Participants will also take part in a process evaluation informed by the UK Medical Research Council guidelines to explore implementation (process, fidelity, dose, adaptations, reach), mechanisms of action (participant experience and response to intervention, mediators, unexpected pathways and consequences), and contextual factors that may affect implementation and intervention outcomes. Methods will entail qualitative and quantitative approaches, including surveys, interviews, web-based and app-based analytic data, and direct observation. In addition, other measures have been added to the research protocol to address the following exploratory aims (all relevant measures are described in the outcomes section):
A. To identify the most cost-effective intervention condition from the societal perspective (e.g., self-reported sickness absence).
B. To explore time-varying and baseline moderators on intervention outcomes (e.g., sociodemographic variables, personality).
C. To investigate behavior maintenance by assessing the intervention outcomes at six months of follow-up (i.e., 12 months after baseline).
D. To investigate which smartphone sensor data might be effective in predicting user state of receptivity to LvL UP notifications (receptivity: the likelihood of engaging with a LvL UP notification, operationalized as higher response rate and decreased response time).
E. To investigate which signals (e.g., audio signals, usage patterns) are most useful for predicting the presence of subclinical depression, anxiety, stress and/or other mental health conditions.
F. To validate a 7-day modified Food Frequency Questionnaire based on My Healthy Plate recommendations by Singapore Health Promotion Board (HPB).
G. To develop and evaluate a supervised non-responder / dropout prediction model using retrospective user app engagement data from the trial.
H. To explore views on climate and climate change and assess their perceived impact (including impact on health behaviours).
The study was powered to compare the baseline to 6 months change in mental well-being between LvL UP (A+B) and the comparison condition and between LvL UP + adaptive MI (A+C) versus the comparison condition (primary objective). For both comparisons, we assume the effect size (Cohen's d) for well-being to be 0.3 and the responder rate to stage 1 intervention (LvL UP) to be 50%. The effect size was estimated by aggregating data from five meta-analyses on mHealth interventions and their reported impact on participant's mental well-being. To obtain a marginal power of at least 80% with a two-tailed Type I error rate of 5% for each outcome, 458 participants will be required; we further buffer for 73% retention following a recent meta-analysis estimate for digital health interventions lasting more than 8 weeks, rounding the number for a final sample size of 650. Therefore, 217 participants will be randomized to the comparison condition, and 433 participants will be randomized to start with stage 1 intervention (LvL UP), of which we estimate about 217 participants (50% non-responders) will be re-randomized to either continue with LvL UP or receive MI at stage 2 (LvL UP + adaptive MI). Participants randomized to group 1 (LvL UP) are asked to nominate a LvL UP Buddy, which will take part in the process evaluation. The total sample size is thus 1,073 (650 as main participants and 423 as LvL UP Buddies). The above sample size calculations might be refined based on the LvL UP pilot study results.
Conditions
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Study Design
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RANDOMIZED
SEQUENTIAL
PREVENTION
DOUBLE
Study Groups
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LvL UP
Downloading and using the LvL UP app
LvL UP
The LvL UP app includes four lifestyle intervention components centred around three core pillars, Move More (physical activity), Eat Well (healthy nutrition), and Stress Less (mental well-being), as follows: (i) conversational agent-delivered health literacy coaching sessions, (ii) daily "Life Hacks" (healthy habit suggestions), (iii) therapeutic Tools including step-based activity tracker, food diary, and journal and (iv) gamified slow-paced breathing training (Breeze). These components are delivered using an innovative engagement approach that combines storytelling, MI, feedback on progress, just-in-time adaptive notifications and gamification.
As part of the LvL UP app onboarding, participants are asked to nominate a 'LvL UP Buddy' (e.g., a friend, family member, or spouse) to provide additional support. Buddies are expected to complete different tasks, such as sending messages of encouragement or engaging in intervention-related activities together with the participant.
LvL UP + MI
Downloading and using the LvL UP app + taking part in motivational interviewing support sessions
LvL UP + MI
After 4 weeks, participants categorized as non-responders from the LvL UP group will be re-randomized into second-stage conditions: (i) continuing with the initial intervention (LvL UP) or (ii) additional human-delivered motivational interviewing (MI) support sessions (LvL UP + MI). The MI-informed sessions for non-responders will consist of four sessions delivered via WhatsApp, lasting between 30 and 40 minutes. The content of support will include various MI-based strategies such as use of ask-offer-ask framework and strategic use of communication skills (open-ended questions, reflections, affirmations and summaries) as per four MI processes:
* Engaging (foster collaboration and trust the research staff-user relationship)
* Focusing (conversation to focus on lifestyle changes)
* Evoking (elicit and strengthen participants' motivation towards lifestyle changes), and
* Planning (when the participant is ready, commitment to a change plan aimed at adopting a healthy lifestyle).
Comparison
Receiving healthy lifestyle and mental well-being resources from Singapore's Health Promotion Board
Comparison
Participants randomised to the comparison condition will receive a study pack including physical activity, diet and mental well-being content extracted from existing Health Promotion Board (HPB) resources. Established in 2001, the HPB (https://hpb.gov.sg/) is a government organisation under the Ministry of Health committed to promoting healthy living in Singapore. HPB's organises health promotion and disease prevention programmes covering various health domains. HPB-developed resources were selected as the comparator because they are the 'go-to', nation-wide health resources in Singapore which cover LvL UP's domains.
Interventions
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LvL UP
The LvL UP app includes four lifestyle intervention components centred around three core pillars, Move More (physical activity), Eat Well (healthy nutrition), and Stress Less (mental well-being), as follows: (i) conversational agent-delivered health literacy coaching sessions, (ii) daily "Life Hacks" (healthy habit suggestions), (iii) therapeutic Tools including step-based activity tracker, food diary, and journal and (iv) gamified slow-paced breathing training (Breeze). These components are delivered using an innovative engagement approach that combines storytelling, MI, feedback on progress, just-in-time adaptive notifications and gamification.
As part of the LvL UP app onboarding, participants are asked to nominate a 'LvL UP Buddy' (e.g., a friend, family member, or spouse) to provide additional support. Buddies are expected to complete different tasks, such as sending messages of encouragement or engaging in intervention-related activities together with the participant.
LvL UP + MI
After 4 weeks, participants categorized as non-responders from the LvL UP group will be re-randomized into second-stage conditions: (i) continuing with the initial intervention (LvL UP) or (ii) additional human-delivered motivational interviewing (MI) support sessions (LvL UP + MI). The MI-informed sessions for non-responders will consist of four sessions delivered via WhatsApp, lasting between 30 and 40 minutes. The content of support will include various MI-based strategies such as use of ask-offer-ask framework and strategic use of communication skills (open-ended questions, reflections, affirmations and summaries) as per four MI processes:
* Engaging (foster collaboration and trust the research staff-user relationship)
* Focusing (conversation to focus on lifestyle changes)
* Evoking (elicit and strengthen participants' motivation towards lifestyle changes), and
* Planning (when the participant is ready, commitment to a change plan aimed at adopting a healthy lifestyle).
Comparison
Participants randomised to the comparison condition will receive a study pack including physical activity, diet and mental well-being content extracted from existing Health Promotion Board (HPB) resources. Established in 2001, the HPB (https://hpb.gov.sg/) is a government organisation under the Ministry of Health committed to promoting healthy living in Singapore. HPB's organises health promotion and disease prevention programmes covering various health domains. HPB-developed resources were selected as the comparator because they are the 'go-to', nation-wide health resources in Singapore which cover LvL UP's domains.
Eligibility Criteria
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Inclusion Criteria
(ii) Singapore citizens, permanent residents, or foreigners residing in Singapore on long-term passes with at least 1 year of validity remaining,
(iii) planning to reside in Singapore for the duration of the study (eligible participants can undertake sporadic trips overseas, as long as these do not conflict with in-person study visits),
(iv) proficient in English (the LvL UP app is currently only available in English),
(v) owners of a smartphone (minimum requirements: iOS version 12.4 and Android version 8) with internet access,
(vi) able to provide informed consent, and
(vii) identified as 'at risk' of developing non-communicable diseases and/or common mental disorders.
Exclusion Criteria
(ii) diagnosed with one of the following mental disorders: major depressive disorders (depression), bipolar, eating disorders, post-traumatic stress disorder (PTSD), anxiety disorders, severe personality disorder, substance use disorders, or other mental health conditions diagnosed by a mental health professional.
(iii) pregnant, (iv) currently taking medications prescribed for high blood pressure or high blood glucose.
(v) past or current LvL UP users, including participants from the LvL UP pilot trial (NCT06360029) or HAPPY trial (Harnessing Human Potential and Improving Health Span in Women and their Children Trial).
(vi) already participating or planning to participate in the LvL UP trial as a 'LvL UP Buddy\'.
(vii) enrolled or planning to enroll in another lifestyle intervention research study before or during the study period.
21 Years
59 Years
ALL
Yes
Sponsors
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ETH Zurich
OTHER
National University of Singapore
OTHER
Nanyang Technological University
OTHER
Singapore ETH Centre
OTHER
Responsible Party
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Principal Investigators
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Falk Mueller-Riemenschneider, Professor
Role: PRINCIPAL_INVESTIGATOR
National University of Singapore
Tobias Kowatsch, Professor
Role: PRINCIPAL_INVESTIGATOR
ETH Zurich
Konstantina Griva, Professor
Role: PRINCIPAL_INVESTIGATOR
Nanyang Technological University
Locations
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Saw Swee Hock School of Public Health
Singapore, , Singapore
Singapore ETH Center
Singapore, , Singapore
Countries
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References
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Castro O, Mair JL, Salamanca-Sanabria A, Alattas A, Keller R, Zheng S, Jabir A, Lin X, Frese BF, Lim CS, Santhanam P, van Dam RM, Car J, Lee J, Tai ES, Fleisch E, von Wangenheim F, Tudor Car L, Muller-Riemenschneider F, Kowatsch T. Development of "LvL UP 1.0": a smartphone-based, conversational agent-delivered holistic lifestyle intervention for the prevention of non-communicable diseases and common mental disorders. Front Digit Health. 2023 May 10;5:1039171. doi: 10.3389/fdgth.2023.1039171. eCollection 2023.
Jabir AI, Lin X, Martinengo L, Sharp G, Theng YL, Tudor Car L. Attrition in Conversational Agent-Delivered Mental Health Interventions: Systematic Review and Meta-Analysis. J Med Internet Res. 2024 Feb 27;26:e48168. doi: 10.2196/48168.
Moore GF, Audrey S, Barker M, Bond L, Bonell C, Hardeman W, Moore L, O'Cathain A, Tinati T, Wight D, Baird J. Process evaluation of complex interventions: Medical Research Council guidance. BMJ. 2015 Mar 19;350:h1258. doi: 10.1136/bmj.h1258.
Yan X, Ghosh P, Chakraborty B. Sample size calculation based on precision for pilot sequential multiple assignment randomized trial (SMART). Biom J. 2021 Feb;63(2):247-271. doi: 10.1002/bimj.201900364. Epub 2020 Jun 11.
Other Identifiers
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LvL UP Trial
Identifier Type: -
Identifier Source: org_study_id
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