Evaluation of a mobile app for body weight reduction

Evaluation of a mobile app for body weight reduction - EvalApp

Status

Active, not recruiting

Phases

Phase 2

Study type

Interventional

Source

DRKS

Registry ID

DRKS00012282

Enrollment

100

Registered

2017-04-19

Start date

2017-04-27

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

E65-E68

Interventions

Group 1: Overweight and obese subjects use a three-month application cycle of a mobile app for body weight reduction. The app should be used daily. The program requires an attention span of approximat

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: age of legal majority overweight/obesity (BMI > 30 kg/m²) owning a smartphone with iOS/Android operating system

Exclusion criteria

Exclusion criteria: Internal, neurological or psychiatric disorders which prohibit a change in dietary habits; Taking medications which influence weight regulation; Known internet addiction

Design outcomes

Primary

Measure	Time frame
Changes in body weight are observed over a period of one year. At the beginning (first examination date) the subjects are weighed. Then they get access to the mobile app and should use it daily for a three-month application cycle. The body weight is measured again after one month (second examination date), after three months (third examination date), after six months (fourth examination date) and after twelve months (fifth examination date).	—

Measure

Time frame

Changes in body weight are observed over a period of one year. At the beginning (first examination date) the subjects are weighed. Then they get access to the mobile app and should use it daily for a three-month application cycle. The body weight is measured again after one month (second examination date), after three months (third examination date), after six months (fourth examination date) and after twelve months (fifth examination date).

—

Secondary

Measure	Time frame
Body composition: By a bioelectrical impedance analysis (BIA), muscle mass and fat mass are determined at the beginning (first examination date), after one month (second examination date), after three months (third examination date), after six months (fourth examination date) and after twelve months (fifth examination date). Blood parameters: Blood samples are taken at all five examination dates to determine blood glucose levels ??(glucose, HbA1c, insulin), blood fat levels ??(cholesterol, triglycerides, HDL, LDL) and stress hormones (cortisol, ACTH). Sociodemographic data: At the beginning (first examination date), general data on household size, education and employment are collected via a questionnaire. Goals of weight reduction, self-image and self-efficacy related to the body weight are recorded through questionnaires at all five examination dates. Eating habits (how do I eat?) and eating behavior (why do I eat?) are collected via questionnaires at all four examination appointments. In addition, the health-related quality of life and life satisfaction are recorded by questionnaires on all five examination dates.	—

Measure

Time frame

Body composition: By a bioelectrical impedance analysis (BIA), muscle mass and fat mass are determined at the beginning (first examination date), after one month (second examination date), after three months (third examination date), after six months (fourth examination date) and after twelve months (fifth examination date). Blood parameters: Blood samples are taken at all five examination dates to determine blood glucose levels ??(glucose, HbA1c, insulin), blood fat levels ??(cholesterol, triglycerides, HDL, LDL) and stress hormones (cortisol, ACTH). Sociodemographic data: At the beginning (first examination date), general data on household size, education and employment are collected via a questionnaire. Goals of weight reduction, self-image and self-efficacy related to the body weight are recorded through questionnaires at all five examination dates. Eating habits (how do I eat?) and eating behavior (why do I eat?) are collected via questionnaires at all four examination appointments. In addition, the health-related quality of life and life satisfaction are recorded by questionnaires on all five examination dates.

—

Countries

Germany

Contacts

Public ContactKai Duysen

Sektion für Psychoneurobiologie; Center of Brain, Behavior and Metabolism; Universität zu Lübeck

kai.duysen@uni-luebeck.de045131017532

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026