This study aims to evaluate if a web-based digital support system aiming to replacing or complement standardized pediatric behavioural obesity treatment. The hypothesis is that a digital system of communication between the family and the clinic can generate improved treatment results (change in BMI SDS) and reduce the number of missed visits.

Childhood obesity treatment is time consuming for both the health care system, and for the involved families. There is an association between the intensity and the outcome of treatment.

In this study all children who start treatment for childhood obesity will use a digital support system as a complement to behavioral treatment. The digital support system includes daily weighing on scales that do not show any digits, linked to a mobile app where weight development is shown as a moving average in the form of BMI standard deviation score (SDS). The app also provides an individual target curve visualizing the expected weight journey. Weight in growing children is complex to interpret why BMI SDS is used. Objective data from scale are automatically transferred to the database and the clinic and the family have direct contact with the clinic via the app.

The evaluation will be carried out when approximately 120 children have had the opportunity to be treated with the support system for one year. The results will be compared with a matched control group from the BORIS childhood obesity treatment register.

Inclusion Criteria:

• Obesity according to International Obesity Task Force (IOTF)

Exclusion Criteria:

• No

All children who start treatment for childhood obesity at Martina children Hospital will use a digital support system as a complement to behavioral treatment. Approximately 120 children 3-18 years will be included in this first evaluation.