Efficacy and Cost-effectiveness of Internet-delivered CBT for Adolescents with Depression

Inclusion Criteria: * 13-17 years of age, * A diagnosis of mild to moderate MDD based on the DSM-5, * Willing to be randomized to either of the three treatment arms, * Basic proficiency in Swedish, both adolescent, and a participating caregiver * Regular access to a desktop, laptop computer connected to the internet, as well as a mobile phone, * If using medication with antidepressants, central stimulants, or neuroleptics it has to be unchanged at least 6 weeks prior to inclusion, and * A minimum of one caregiver that is able to co-participate in the treatment. Exclusion Criteria: * The presence of psychiatric problems requiring immediate treatment (e.g., high risk of suicide, psychosis, severe self-injury, bipolar disorder, clinical eating disorder, alcohol/substance abuse), * Social problems requiring immediate action (e.g., ongoing abuse in the family, high and prolonged absence from school); * Previous psychological treatment for MDD (CBT, interpersonal psychotherapy (IPT), or BA) for a minimum of at least 3 sessions within the last 12 months prior to assessment. * Current use of benzodiazepines. * Ongoing psychological treatment for any psychiatric disorder.