Transdiagnostic Sleep and Circadian Intervention + Bright Light in Adolescents With Elevated Depression (TranS-C+BL)

Feasibility of interventions as by measured by the mean of number of sessions attended. Local study documents are used to track each session that was completed.

Attrition will be assessed using a study-specific form reflecting participants who withdraw or are withdrawn from the TranS-C+ intervention. The proportion of patients who withdraw or are withdrawn will be calculated.

Treatment satisfaction will be measured by the patient-reported Treatment Satisfaction Questionnaire administered post-treatment. The Treatment Satisfaction Questionnaire assesses satisfaction with the treatment received and perception of progress; each item is rated on a Likert scale. Additional open-ended questions allow for participants to share feedback on strengths and weaknesses as well as any other feedback related to their satisfaction with the intervention. The Questionnaire has questions on a 1(Not at all)-7(Very Much). Questions on study clinicians are asked on a 1(Poor)-7(Superior) Likert scale. Questions on the duration of study on a 1(Much too short)-7(Much to long) Likert scale. Questions about frequency of visits on a 1(Much too infrequent)-7(Much to frequent). Questions for recommendations to other rated on a 1(Strongly recommend)-7(Strongly not recommend). Questions on future outlook rated on a 1(Very Pessimistic)-7(Very Optimistic).

Self-reported sleep disturbance will be assessed via the Pediatric PROMIS Sleep Disturbance and Sleep Related Impairment Measures. The Patient-Reported Outcomes Measurement Information System is an 8-item measure. The scoring ranges from Never (1) Almost Never (2) Sometimes (3) Almost Always (4) Always (5). The PROMIS scale is scored on the T-score metric scale. The higher the participant scores more of the concept being measured. With the general population getting a score of 50 with a standard deviation of 10

Depressive symptom severity will be assessed via the self-reported PHQ-9-M. The Patient Health Questionnaire is a 13-item measure. The questions are rating on a 0(Not at all)- 3(Nearly Every day) Likert scale. Additional questions rated on a scale of Not difficult at all to Extremely difficult, along with yes/no questions. The PHQ-9M is rated on a scale from 0 to 27. Higher scores are associated with higher levels of, or more severe, depression

Suicidal thoughts and behaviors will be assessed via the C-SSRS. The Columbia-Suicide Severity Rating Scale is an 18-item measure. This measure contains yes/no questions, asking about both about suicidality over the past 3 months and lifetime. In the C-SSRS the higher the score the more risk of suicidality (0 = No risk reported (all "no" responses),1 - 2 = Low risk ,3 - 6 = Moderate to high risk)

Self-reported sleep disturbance will be assessed via the Pediatric PROMIS Sleep Disturbance and Sleep Related Impairment Measures. The Patient-Reported Outcomes Measurement Information System is an 8-item measure. The scoring ranges from Never (1) Almost Never (2) Sometimes (3) Almost Always (4) Always (5). The PROMIS scale is scored on the T-score metric scale. The higher the participant scores more of the concept being measured. With the general population getting a score of 50 with a standard deviation of 10

Self-reported sleep disturbance will be assessed via the Pediatric PROMIS Sleep Disturbance and Sleep Related Impairment Measures. The Patient-Reported Outcomes Measurement Information System is an 8-item measure. The scoring ranges from Never (1) Almost Never (2) Sometimes (3) Almost Always (4) Always (5). The PROMIS scale is scored on the T-score metric scale. The higher the participant scores more of the concept being measured. With the general population getting a score of 50 with a standard deviation of 10

Depressive symptom severity will be assessed via the self-reported PHQ-9-M. The Patient Health Questionnaire is a 13-item measure. The questions are rating on a 0(Not at all)- 3(Nearly Every day) Likert scale. Additional questions rated on a scale of Not difficult at all to Extremely difficult, along with yes/no questions. The PHQ-9M is rated on a scale from 0 to 27. Higher scores are associated with higher levels of, or more severe, depression

Depressive symptom severity will be assessed via the self-reported PHQ-9-M. The Patient Health Questionnaire is a 13-item measure. The questions are rating on a 0(Not at all)- 3(Nearly Every day) Likert scale. Additional questions rated on a scale of Not difficult at all to Extremely difficult, along with yes/no questions. The PHQ-9M is rated on a scale from 0 to 27. Higher scores are associated with higher levels of, or more severe, depression

Suicidal thoughts and behaviors will be assessed via the C-SSRS. The Columbia-Suicide Severity Rating Scale is an 18-item measure. This measure contains yes/no questions, asking about both about suicidality over the past 3 months and lifetime. In the C-SSRS the higher the score the more risk of suicidality (0 = No risk reported (all "no" responses),1 - 2 = Low risk ,3 - 6 = Moderate to high risk)

Suicidal thoughts and behaviors will be assessed via the C-SSRS. The Columbia-Suicide Severity Rating Scale is an 18-item measure. This measure contains yes/no questions, asking about both about suicidality over the past 3 months and lifetime. In the C-SSRS the higher the score the more risk of suicidality (0 = No risk reported (all "no" responses),1 - 2 = Low risk ,3 - 6 = Moderate to high risk)