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Randomized Controlled Trial
. 2019 Sep;65(3):224-238.
doi: 10.13109/zptm.2019.65.3.224.

[App-controlled feedback devices can support sustainability of weight loss. Multicentre QUANT-study shows additional weight loss and gain of QoL via multiple feedback-devices in OPTIFAST®52-program]

[Article in German]
Affiliations
Randomized Controlled Trial

[App-controlled feedback devices can support sustainability of weight loss. Multicentre QUANT-study shows additional weight loss and gain of QoL via multiple feedback-devices in OPTIFAST®52-program]

[Article in German]
Thomas Kurscheid et al. Z Psychosom Med Psychother. 2019 Sep.

Abstract

App-controlled feedback devices can support sustainability of weight loss. Multicentre QUANT-study shows additional weight loss and gain of QoL via multiple feedback-devices in OPTIFAST®52-program Objective: Are three app-controlled feedback devices, tested against a simple pedometer in a weight reduction program, supporting sustainable therapy success and quality of life (QoL)? Methods: In this multi-centre randomised controlled study adults with obesity (n = 89, m = 46.5 years, women n = 54), achieved high weight loss (from 42.7 kg/m² to 35.2 kg/m²) while completing the first three month of the OPTIFAST®52-program. Thereafter the intervention group (IG) used feedback devices (BIA scale, blood pressure monitor, step counter), the control group a mechanical pedometer without app for another year. Intention-to-treat analysis (ITT) and As-treated analysis (AT) were carried out. Results: Feedback devices had a positive effect on fat-loss and secondary study objectives like QoL, leading to a better sustainability of these improvements. Participants in IG (AT for t2-t0) had improvements for Waist-to-Height-ratio (WHtR) and physically and mentally quality of life. Conclusion: The results are presumably based on an increase in self-efficacy and the experience of control. Future studies should be preceded by a pilot study to analyse acceptance problems.

Zusammenfassung Fragestellung: Können drei app-gesteuerte Feedbackgeräte den Therapieerfolg eines Gewichtsmanagementprogrammes, das bereits einen Schrittzähler benutzt, noch weiter positiv und nachhaltig beeinflussen und die Lebensqualität (LQ) erhöhen? Methoden: In einer multizentrischen randomisierten kontrollierten Studie erzielten Erwachsene mit Adipositas (n = 89, MW = 46.5 Jahre, Frauen n = 54) in den ersten drei Monaten einen starken Gewichtsverlust (von 42.7 kg/m² auf 35.2 kg/m²) durch das OPTIFAST ®52-Programm. Die Interventionsgruppe (IG) nutzte danach Feedbackgeräte (Schrittzähler, Bioimpedanz-Waage, Blutdruckmessgerät), die Kontrollgruppe (KG) einen mechanischen Schrittzähler ohne App-Funktion für ein weiteres Jahr. Auswertungen fanden als Intention-to-treat-Analyse (ITT) und As-treated-Analyse (AT) statt. Ergebnisse: Die Feedbackgeräte hatten einen positiven Einfluss auf den Fettverlust sowie die LQ und erhöhten die Nachhaltigkeit der Verbesserungen nach Beendigung des Programms. Teilnehmer der IG (AT für t2-t0) hatten Verbesserungen der Waist-to-Height-ratio (WHtR) und der physischen und mentalen Lebensqualität. Diskussion: Den Ergebnissen liegt vermutlich eine Erhöhung der Selbstwirksamkeit und des Kontrollerlebens zu Grunde. Zukünftige Studien sollten eine Pilotstudie vorschalten, um Akzeptanzprobleme zu analysieren.

Keywords: Biofeedback; Obesity; Quality of Life; SF12; Self-Efficacy; Sustainability of Weight Loss; Wearables; Weight Reduction Program; m-Health App.

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