Yu 2002‐study 3.

Methods	Design: RCT Conducted by the team who developed the intervention: yes
Participants	Description: targeted Cut‐point for inclusion for indicated studies: those with scores in the top 25% for their age bracket on combined z scores on the CDI and on the perception of family relationships item of the Cohesion and Conflict subscale of the FES What risk was basis of inclusion for selected studies: N/A Diagnostic interview to exclude those with current or previous depression: diagnostic interview not undertaken, however, those with current and/or past episodes of depression not excluded Baseline severity of depression: CDI: 17.1 (moderate)   Mean age: 11.8 Age range: 8 to 15 Percentage male: 55.5% Setting: school   State what psychiatric diagnoses were excluded: exclusion criteria not specified Suicide risk excluded: exclusion criteria not specified Parents with history of schizophrenia/bipolar disorder excluded: exclusion criteria not specified   Country: China
Interventions	Broad category: CBT (for further information on intervention components, see Table 3) Manualised: yes Online: no Name of programme: Penn Resiliency Program, Chinese adaption Number of sessions: 10 sessions Length of sessions: 120 minutes Intensity (total number of hours): 20 hours Duration of treatment period: 10 weeks Group size: 10 to 14 Delivered by: non‐mental health experts Fidelity: not assessed Type of comparison: NT
Outcomes	Diagnosis: CDI ≥ 15.0 (moderate depression) and CDI ≥ 20.0 (severe depression) Name of self‐report depression measure: CDI Name of clinical report depression measure: N/A Name of anxiety measure: N/A Name of general functioning measure: N/A Assessment points: post‐intervention and 6 months (short‐term)
Notes	Author contacted for methodological detail: no Author contacted for treatment manual: no Author contacted for outcome data: no
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	No information specified
Allocation concealment (selection bias)	Unclear risk	No information specified
Blinding (performance bias and detection bias) Subjects	High risk	The nature of the trial suggests it is unlikely participants could have remained blind to the fact they were allocated to a no treatment control group. However, without access to the participant information sheets and PLS, level of blinding cannot be ascertained.
Blinding (performance bias and detection bias) Assessors	Unclear risk	Outcomes self‐reported. Assessor blinding therefore not applicable.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Proportion of participants with incomplete post‐intervention self‐reported depression scores: 2.3% Means and SDs used in meta‐analysis based on what data: observed cases Intention‐to‐treat analyses: N/A
Selective reporting (reporting bias)	Unclear risk	Protocol not available
Other bias	High risk	Trial conducted by those who developed the intervention
Implementation integrity	Unclear risk	Implementation integrity assessed: unclear if assessed Implementation integrity adequate: N/A Implementation integrity reported: N/A

ADHD: attention deficit hyperactivity disorder
 ADIS‐C: Anxiety Disorders Interview Schedule for Children
 ASQ: Attribution Style Questionniare

AP: attention placebo
 BAI: Beck Anxiety Inventory
 BDI: Beck Depression Inventory
 BDI‐II: Beck Depression Inventory‐second revision
 BSI: Brief Symptom Inventory

BT: behavioural therapy
 CASAFS: Child and Adolescent Social and Adaptive Functioning Scale

CATCH‐IT: Competent Adulthood Transition with Cognitive‐behavioral and Interpersonal Training
 CBT: cognitive behavioural therapy
 CDI: Children's Depression Inventory
 CDRS‐R: Children's Depression Rating Scale‐Revised
 CDS: Children's Depression Scale
 CES‐D: Center for Epidemiologic Studies Depression Scale
 CGAS: Children's Global Assessment Scale

CSAQ: Cognitive Somatic Anxiety Questionniare

CURB: 
 DASS: Depression Anxiety Stress Scale

DICA‐IV: Diagnostic Interviewfor Children and Adolescents, version four
 DISC‐IV: Diagnostic Interview Schedule for Children, version four
 DISCAP: Diagnostic Interview Schedule for Children, Adolescents, and Parents

FES: Family Environment Scale

GLMM: Generalised Linear Mixed Model
 GP: general practitioner

HAM‐D: Hamilton Depression Rating Scale
 HMO: health maintenance organisation
 IPT: interpersonal therapy
 IPT‐AST: interpersonal psychotherapy‐adolescent skills training
 ITT: intention‐to‐treat
 K‐SADS: Kiddie‐Schedule for Affective Disorders and Schizophrenia for School‐Age Children
 K‐SADS‐E: Kiddie‐Schedule for Affective Disorders and Schizophrenia‐Epidemiological version
 K‐SADS‐PL: Kiddie‐Schedule for Affective Disorders and Schizophrenia‐Present and Lifetime version

LARS&LISA‐T: Ease of Handling Social Aspects in Everyday Life‐Training (English Translation)
 LIFE: Longitudinal Interval Follow‐up Evaluation
 LOCF: last observation carried forward
 MASQ: Mood and Anxiety Symptom Questionnaire
 MDD: major depressive disorder
 MFQ: Mood and Feeling Questionnaire
 N/A: not available
 NIMH: National Institute of Mental Health
 NT: no treatment
 PIR: Peer Interpersonal Relatedness

PHQ‐9: Patient Health Questionniare‐9 item version. 
 PLS: plain language statement
 PQ‐LES‐Q: Paediatric Quality of Life Enjoyment and Satisfaction Questionnaire
 PRP: Penn Resilience Program

RAP‐PIR: Resourceful Adolescent Program‐Peer Interpersonal Relatedness
 RADS: Reynold's Adolescent Depression Scale
 RADS‐2: Reynold's Adolescent Depression Scale, version two
 RCADS: Revised Child Anxiety and Depression Scale
 RCMAS: Revised Children's Manifest Anxiety Scale
 RCT: randomised controlled trial
 SACQ: Student Adaption to College Questionnaire
 SAI‐C: State Anxiety Inventory for Children
 SAS‐SR‐Y: Social Adjustment Scale‐Self‐Report for Youth
 SAS: Social Adjustment Scale
 SBB‐DES: Selbstbeurteilungsbogen‐Depressive Störungen (Self‐Report Questionnaire‐Depression)
 SCAS: Spence Children's Anxiety Scale
 SCID‐I: Structured Clinical Interview for DSM‐IV
 SD: standard deviation
 SMFQ: Short Mood Feeling Questionnaire
 SWEMWBS: Short Warwick‐Edinburgh Mental Well‐Being Scale
 TAU: treatment as usual
 WL: wait‐list
 YSR: Youth Self‐Report