School-aged children and adolescents included in the earlier survey collection.
National Brain Health Platform
Child and Adolescent Brain Health Cohort.
A cohort resource for school-aged children and adolescents under the National Brain Health Platform, spanning primary and secondary education. The programme integrates family and socioeconomic circumstances, school and peer experiences, bullying, digital behavior and AI use, sleep, pain, mental health, and planned multimodal deep phenotyping.
Primary and secondary school records currently available for this interim summary.
Combined record count across the two collection periods; participant overlap has not yet been validated.
EEG, fNIRS, speech/facial expression features, blood samples, and related biological measures are planned within ongoing or upcoming waves.
2024Cross-sectional school surveyOpen
Participants
Primary and secondary school students.
Current sample
41,142 survey records in this collection period.
Questionnaire content
Demographics, household composition, socioeconomic circumstances, school context, lifestyle, sleep, mental health, pain, and developmental measures.
Linkage status
Potential linkage fields exist, but no public longitudinal interval or matched sample is asserted until validation is complete.
Deep phenotyping
No deep-phenotyping programme is reported for this collection period.
Current collectionExpanded child and adolescent assessmentOpen
Participants
Primary and secondary school students in the current cleaned datasets.
Current sample
10,912 survey records in this interim public summary.
Questionnaire content
Expanded family, school, bullying, sleep, pain, mental health, digital behaviour, and detailed AI-use modules.
Linkage status
Data sources remain separately identified from the 2024 survey; linkage will be reported only after identifier, consent, and interval validation.
Deep phenotyping
EEG, fNIRS, speech, facial-expression, and blood-sample modules are being prepared for selected participants.
Next milestoneProgramme and fieldwork expansionOpen
Participants
Additional school-aged children and adolescents.
Expected sample
Approximately 20,000 additional participants as fieldwork continues.
Questionnaire content
The core framework will be retained, with age-appropriate refinements and modules addressing emerging social issues.
Linkage status
Future follow-up and linkage schedules will be published after study procedures are finalized.
Deep phenotyping
Planned selected-subsample modules include EEG, fNIRS, speech and facial-expression features, blood samples, and related biological measures.
Domain
2024 survey
Current collection
Planned expansion
Family structure
Measured
Measured
Expected
School and peer context
Measured
Measured
Expected
Bullying and victimization
Measured
Measured
Expected
Sleep and daily rhythm
Measured
Measured
Expected, with actigraphy or PSG subsets
Pain and somatic symptoms
Measured
Measured
Expected
Depression and anxiety
Measured
Measured
Expected, with clinical interview subsets
Digital behavior
Measured
Measured
Expected
Deep phenotyping modules
Not collected
Planned subset
Planned subset: EEG, fNIRS, blood, speech and facial expression features
Family structure and socioeconomic context
Parent co-residence, living with grandparents or other relatives, sibling status, parental education, parental occupation, marital status, parenting style, perceived family life, and household socioeconomic circumstances.
School and peer context
School stage, grade, class, boarding status, transfer history, self-reported academic performance, close friends, school adaptation, and bullying victimization/perpetration experiences.
Brain health and behavior
Depressive and anxiety symptoms, sleep timing and quality, recurrent pain and somatic symptoms, resilience, digital media use, internet-related behavior, physical activity, outdoor time, smoking, and alcohol exposure.
Questionnaire catalogues
Questionnaire-derived fields can be browsed by measurement domain and source instrument. Open the child and adolescent questionnaire catalogue or view the college student questionnaire catalogue.
Programme expansion
Approximately 20,000 additional child and adolescent participants are expected after the next fieldwork milestone, strengthening analyses across developmental periods.
Planned multimodal phenotyping
Future data collection is expected to include EEG, fNIRS, speech and facial expression features, blood samples, and related biological measures.
Participant profile
Primary and secondary school students across two collection periods.
The programme currently contains 52,054 survey records: 41,142 from the 2024 cross-sectional survey and 10,912 from the current collection. Because participant overlap has not yet been validated, this is a record count rather than a unique-participant count.
2024 collection
Cross-sectional school survey
This collection contributes 41,142 survey records from primary and secondary school students. Results are summarized for the collection as a whole, without imposing educational-stage categories that have not yet completed cross-field validation.
41,142Survey records
Sex
Available responses: 41,142 of 41,142 (100.0%); missing: 0. Percentages use available responses.
Residential setting
Available responses: 41,142 of 41,142 (100.0%); missing: 0. Percentages use available responses.
Household composition
Available responses: 41,142 of 41,142 (100.0%); missing: 0. Percentages use available responses.
Boarding status
Available responses: 41,142 of 41,142 (100.0%); missing: 0. Percentages use available responses.
Self-reported academic performance
Available responses: 41,142 of 41,142 (100.0%); missing: 0. Percentages use available responses.
Sibling composition
Available responses: 29,999 of 41,142 (72.9%); missing: 11,143. Percentages use available responses.
Family socioeconomic measures
Paternal educational attainment
Available responses: 41,142 of 41,142 (100.0%); missing: 0. Percentages use available responses.
Maternal educational attainment
Available responses: 41,142 of 41,142 (100.0%); missing: 0. Percentages use available responses.
Current collection
Expanded primary and secondary school assessment
The current cleaned datasets contribute 10,912 survey records. The overview combines the two age-appropriate questionnaire sources for a programme-level description while retaining source identifiers in the research data. Each chart reports the available response count and calculates percentages among non-missing responses.
10,912Survey records
Sex
Available responses: 9,584 of 10,912 (87.8%); missing: 1,328. Percentages use available responses.
Residential setting
Available responses: 8,780 of 10,912 (80.5%); missing: 2,132. Percentages use available responses.
Household composition
Available responses: 8,982 of 10,912 (82.3%); missing: 1,930. Percentages use available responses.
Boarding status
Available responses: 8,545 of 10,912 (78.3%); missing: 2,367. Percentages use available responses.
Bullying exposure
Available responses: 10,897 of 10,912 (99.9%); missing: 15. Percentages use available responses.
Self-reported academic performance
Available responses: 8,577 of 10,912 (78.6%); missing: 2,335. Percentages use available responses.
Family and socioeconomic measures
Paternal educational attainment
Available responses: 8,497 of 10,912 (77.9%); missing: 2,415. Percentages use available responses.
Maternal educational attainment
Available responses: 8,492 of 10,912 (77.8%); missing: 2,420. Percentages use available responses.
Sibling composition
Available responses: 8,928 of 10,912 (81.8%); missing: 1,984. Percentages use available responses.
Per-capita household income category
Available responses: 7,768 of 10,912 (71.2%); missing: 3,144. Percentages use available responses.