Documentation

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.

  • Growing Up in the 2020s study
  • National Child Development Study
  • 1970 British Cohort Study
  • Next Steps
  • Millennium Cohort Study
  • COVID Social Mobility & Opportunities study
  • Children of the 2020s study
  • Early Life Cohort Feasibility Study
  • linkage
  • Coding frames
  • Data notes
  • Derived variables
  • Ethical review and consent
  • Laboratory procedures
  • Questionnaires and interviewer instructions
  • Showcards
  • Survey reports
  • Technical reports
  • User guides

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Questionnaires and interviewer instructions

NCDS Age 62 Main Stage Questionnaire Documentation

Complete questionnaire for the age 62 survey of the 1958 National Child Development Study (NCDS), including interviewer instructions and modifications by mode.

Date published: 8 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 (Sweep 10).

Date published: 8 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: 8 July 2025

User guides

NCDS Metabolomics User Guide

This User Guide relates exclusively to the metabolomics analysis that was conducted during the Age 62 Survey of the 1958 National Child Development Study. User guide published: June 2025

 

Date published: 30 June 2025

User guides

1970 British Cohort Study Age 51 Geographical Identifiers User Guide

A user guide which provides guidance and recommendations for using geographical identifiers in BCS70 Age 51 Sweep data.

Date published: 3 June 2025

Survey reports

Findings from the Early Life Cohort Feasibility Study small-scale field tests

This briefing outlines key findings from the small-scale field tests conducted as part of the Early Life Cohort Feasibility Study.

Date published: 23 April 2025

Survey reports

Findings from the Early Life Cohort Feasibility Study survey component

This briefing outlines key innovations and contributions the Early Life Cohort Feasibility Study survey component has made for data users and survey methodologists.

Date published: 4 April 2025

User guides

Social isolation variables in the British cohort studies user guide

A user guide which describes the social isolation data collected across five British cohort studies, and explains the harmonisation process. It summarises available variables at different life stages and offers practical guidance on using the data.

Date published: 10 March 2025

Technical reports

BCS70 Age 51 Sweep Technical Report Appendix

Appendices to BCS70 Age 51 Sweep Technical Report.

Date published: 6 March 2025

Technical reports

BCS70 Age 51 Sweep Technical Report

BCS70 Age 51 Sweep technical report from National Centre for Social Research.

Date published: 6 March 2025

Contact us

Centre for Longitudinal Studies
UCL Social Research Institute

20 Bedford Way
London WC1H 0AL

Email: clsdata@ucl.ac.uk

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