Inclusion Criteria:  Overweight or obesity defined as BMI corresponding to or above the 90th percentile for age and sex (International Obesity Task Force cut-offs). Age six to < 12 years at enrolment. Signed informed consent from both parents or legal guardians.  Exclusion Criteria:  Participation in multidisciplinary obesity treatment (i.e. treatment involving more than one type of healthcare profession) within the past 12 months. Having a sibling already enrolled in the HOT versus COT trial. Both parents or legal guardians unable to communicate in Danish (written or oral). Child unable to communicate in Danish (oral). Current or previous clinical diagnosis of either anorexia or bulimia according to ICD-10.