Study: NCT02566824

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Cognitive Behavioural & Skills Training
Description: This will be administered in groups of 10 participants in 12 sessions each lasting 1.5 hours. Each session will focus on a new topic- Modules will be introduced via role play illustrating the topic, followed by Q\&A. Strategies will be introduced to address the problems illustrated. Adolescents will practice using these strategies via planned activities or games. Obstacles to applying the skills in everyday life will be discussed and a physical reminder will be provided for each skill. A homework activity will be assigned to help participants practice the skill during the week. Each session will begin with homework review. Adolescents will also receive individual telephone coaching twice a week during the 12 weeks, which will taper off during the follow-up phase. Parents will also attend their own support group.

Intervention type: BEHAVIORAL
Group type: ACTIVE_COMPARATOR
Intervention: Supportive Group Therapy
Description: This will be administered in groups of 10 participants in 12 sessions each session lasting 1.5 hours. During the initial session group members will be asked to identify a specific goal to address during the program. Each session will review the previous week's events (challenges and positive accomplishments) and psychoeducation on a topic relating to ADHD (topics will be elicited from group members at the outset of each session). Adolescents will also receive a telephone coaching at the same frequency as the CBT+S group participants. These phone calls will deal with issues a given participant had raised in the preceding session, and the approach will emphasize support and unconditional positive regard. Parents will also attend their own support group.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Treatment as Usual - community resources
Description: The treatment as usual group reflects what patients currently receive in the community (mainly medication). Participants will be stabilized on optimal medication (if they choose to be on medication) and referred back to the community for follow-up. Participants are free to seek out any additional interventions that they feel are required. These participants will be evaluated at the same intervals as the two therapy groups. They will receive a follow-up phone call from the study coordinator at two-month intervals in-between evaluation points. If participants indicate during the phone call that they require services, they will be referred to services in the community.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Methylphenidate or amphetamine product
Description: Medication is titrated over a 4-week period with stepwise increments each week. Participants, parents and teachers complete ADHD symptom scales at baseline and before each medication visit. They will also complete side effects scales at baseline and before each medication visit. The gradual increase will continue until there is no further improvement in symptoms and in the Clinical Global Improvement Scale or side effects are such that further increases are not indicated. Once the optimal dose is reached, the participants remain on this dose for the remainder of the study.

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Methylphenidate or amphetamine product
Description: Medication is titrated over a 4-week period with stepwise increments each week. Participants, parents and teachers complete ADHD symptom scales at baseline and before each medication visit. They will also complete side effects scales at baseline and before each medication visit. The gradual increase will continue until there is no further improvement in symptoms and in the Clinical Global Improvement Scale or side effects are such that further increases are not indicated. Once the optimal dose is reached, the participants remain on this dose for the remainder of the study.

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Methylphenidate or amphetamine product
Description: Medication is titrated over a 4-week period with stepwise increments each week. Participants, parents and teachers complete ADHD symptom scales at baseline and before each medication visit. They will also complete side effects scales at baseline and before each medication visit. The gradual increase will continue until there is no further improvement in symptoms and in the Clinical Global Improvement Scale or side effects are such that further increases are not indicated. Once the optimal dose is reached, the participants remain on this dose for the remainder of the study.