Mixed Methods Feasibility Study of an App for Childhood Obesity Prevention and Management

Study Overview
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Brief Summary
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This evaluation evaluated Health Education England's NoObesity digital health app's usability and acceptability to undertake activities improving families' diet, physical activity and weight. The purpose of the study is to evaluate the app's influence on self-efficacy and goal setting and to determine what can be learned to improve its design for future studies, should there be evidence of adoption and sustainability.

Official Title
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Acceptability and Usability of a Mobile Health App for Family Obesity Prevention and Management: A Mixed-methods Feasibility Study

Conditions
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Child Obesity

Intervention / Treatment
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* Device: NoObesity app


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: adult users (over 18 years) fluent in English willing to use the app parents or legal guardians of a child or children OR health care professionals linked to the parent or guardian owner of a smartphone to access the app, with 4G data access Exclusion Criteria: individuals who are known to the researchers or staff at Health Education England deaf or hearing impairment prior use of the app before study commencement refusal to give informed consent children, vulnerable young people, or vulnerable adults.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Using the NoObesity app<br>A mobile digital app (NoObesity) that enables families to set goals, track progress, play games, and access additional information and healthcare professionals to access training and monitor patients' progress. | Device: NoObesity app<br>* The NoObesity system consists of two linked apps - the NoObesity Family app and the NoObesity Professional app.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| User experiences and acceptability of the NoObesity app | Measured qualitatively through semi-structured interviews to examine what participants liked, disliked, and what they thought could be improved | 6 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Usability of the NoObesity app | Measured using the System Usability Scale (minimum of 0, maximum of 100, higher scores indicate better usability) | 6 months | 
| Qualitative user perspectives of usability | Qualitative feedback from semi-structured interviews | 6 months | 
| Perceived impact of app on motivation | Qualitative feedback from semi-structured interviews | 6 months | 
| Perceived impact of specific app features on motivation | Measured quantitatively on self-report final survey | 6 months | 
| Perceived impact of app on health behaviours | Qualitative feedback from semi-structured interviews | 6 months | 
| Self-reported impact of the app on health behaviours | Measured quantitatively on self-report final survey | 6 months | 
| Perceived impact of app on self-efficacy | Measured quantitatively by assessing users' confidence in their ability to achieve goals in the app and in the final survey | 6 months | 
| Engagement with the app | Measured using app use data (first and last logins) and self-reported engagement with the app | 6 months | 
| Factors relating to adoption, implementation, and sustainability | Measured qualitatively in semi-structured interviews with participants and representatives from Health Education England | 6 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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child obesity, digital health, mobile applications, behavior change