ChiCTR1900023145.

Study name	Evaluation of a prevention program for depression among high school adolescent in mainland China: a cluster‐randomized controlled trial
Methods	Study design: cluster‐RCT Country: China
Participants	High school adolescents Inclusion criteria:  a. Chinese high school students Exclusion criteria: No exclusion criteria because this is a universal prevention. If there is a crisis, conduct the crisis intervention first, then receive our course. Stated purpose: to examine the effectiveness of a prevention programme based on cognitive behavioural therapy for depressive symptoms amongst high school students
Interventions	Intervention: Course based on cognitive behavioural therapy Control: Other (course that teaches career development)
Outcomes	Participants' outcomes of interest for this review Mental health symptoms/depression – Mood and Feelings Questionnaire, short version (MFQ) Mental health symptoms/anxiety – Depression Anxiety Stress Scales (DASS‐21) Quality of life – World Health Organization Quality of Life Instruments (WHOQOL‐BREF) Social outcomes (help‐seeking intention) Economic outcomes Nil Time points: baseline, post‐intervention (immediate post‐intervention and 6‐months follow‐up)
Starting date	NA
Contact information	NA
Notes	Source of funding: self‐funded Prospective trial registration number: ChiCTR1900023145