Here you will find all the documentation for our studies. This includes survey questionnaires, interviewer instructions, showcards, technical reports, survey reports, and derived variables. For more information, take a look at our guide to the different documentation types.
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User guides
Harmonised indicators of self-reported asthma in five British cohort studies User Guide
This user guide documents the harmonised indicators of all self-reported measures related to asthma in five British cohort studies: the MRC National Survey of Health and Development (NSHD), the 1958 National Child Development Study (NCDS), the 1970 British Cohort Study (BCS), Next Steps, and the Millennium Cohort Study.
Date published: 18 July 2025
User guides
Harmonised indicators of self-reported diabetes in five British cohort studies User Guide
This user guide documents the harmonised indicators of all self-reported measures related to diabetes in five British cohort studies: the MRC National Survey of Health and Development (NSHD), the 1958 National Child Development Study (NCDS), the 1970 British Cohort Study (BCS), Next Steps, and the Millennium Cohort Study.
Date published: 18 July 2025
User guides
Fertility histories in four British cohort studies User Guide
This user guide accompanies the deposit of datasets on the Cohort Members (CM) fertility histories in four UK cohort studies: MRC National Survey of Health and Development (NSHD), the 1958 National Child Development Study (NCDS), the 1970 British Cohort Study (BCS), and Next Steps.
Date published: 18 July 2025
User guides
NCDS Age 62 User Guide
The comprehensive guide to the data from the Age 62 Sweep of the 1958 National Child Development Study, carried out in 2020-24 when participants were aged 61-65 years.
Date published: 14 July 2025
Questionnaires and interviewer instructions
NCDS Age 62 Main Stage Questionnaire Documentation
Complete questionnaire for the age 62 sweep of the 1958 National Child Development Study (NCDS), including interviewer instructions and modifications by mode.
Date published: 11 July 2025
Questionnaires and interviewer instructions
NCDS Age 62 Self-Completion Questionnaire
‘Your Life Now’ Self-completion paper questionnaire to be completed by the participants of the 1958 National Child Development Study Age 62 Sweep.
Date published: 11 July 2025
Questionnaires and interviewer instructions
NCDS Age 62 Childhood Self-Completion Questionnaire
This self-completion paper questionnaire asks participants of the 1958 National Child Development Study Age 62 Sweep to think back to their childhood and answer questions about their health, education, and family life as a child.
Date published: 11 July 2025
Technical reports
NCDS Age 62 Sweep Technical Report
1958 National Child Development Study Age 62 Sweep technical report from National Centre for Social Research.
Date published: 11 July 2025
Technical reports
NCDS Age 62 Sweep Technical Report Appendix A – Fieldwork Documents
Appendix A of National Child Development Study Age 62 Sweep Technical Report with all related fieldwork documents.
Date published: 11 July 2025
Technical reports
NCDS Age 62 Sweep Technical Report Appendix B – Biomedical protocols
Appendix B of National Child Development Study Age 62 Sweep Technical Report with all related biomedical protocols by NatCen.
Date published: 11 July 2025
Centre for Longitudinal Studies
UCL Social Research Institute
20 Bedford Way
London WC1H 0AL
Email: clsdata@ucl.ac.uk
