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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Questionnaires and interviewer instructions
MCS Age 23 Partner Questionnaire
Partners of MCS cohort members will complete this questionnaire for the Age 23 Sweep.
Date published: 27 November 2023
Questionnaires and interviewer instructions
MCS Age 23 Interview Questionnaire
MCS cohort members will complete this questionnaire for the Age 23 Sweep.
Date published: 2 November 2023
User guides
MCS Linked education administrative datasets KS1-KS4 – Wales
User guide to Linked education administrative datasets KS1-KS4 – Wales.
Version 2.
Date published: 1 October 2023
Survey reports
MCS8 Qualitative Research Findings
The Child of the New Century (CNC) Study (also known as the Millennium Cohort Study) follows the lives of around 19,000 young people living across England, Scotland, Wales and Northern Ireland. Two stages of qualitative research were carried out to support the design of engagement approaches.
Date published: 15 September 2023
User guides
BCS70 Age 46 Survey User Guide
User guide for the BCS70 age 46 biomedical survey dataset.
Date published: 27 July 2023
Questionnaires and interviewer instructions
Next Steps Age 32 Questionnaire
This questionnaire was given to participants of the Next Steps Age 32 Sweep.
Date published: 25 July 2023
User guides
MCS Age 14 Physical Activity: Accelerometer dataset
This user guide accompanies the deposit of the Millennium Cohort Study’s physical activity data.
Date published: 16 May 2023
Questionnaires and interviewer instructions
Next Steps Age 32 Sweep – Content Summary
Next Steps Age 32 Sweep – Content Summary
Date published: 20 January 2023
Questionnaires and interviewer instructions
NCDS Age 62 Sweep – Biomeasures Summary Brief
1958 British Birth Cohort Study (National Child Development Study) Age 62 Sweep Biomeasures – 2022 Data Collection Update
Data Collection
Seated and Standing Blood Pressure
Grip Strength
Venous Blood Collection (non-fasting) and Centrifugation
Anthropometry: Weight and Body Fat, Waist and Hip Circumference
Timed Walk
Leg Raise/Balance
Date published: 19 December 2022
User guides
MCS Hospital Episode Statistics (HES) User Guide
This guide describes the data linkage of health administrative records from the Hospital Episode Statistics (HES) to survey data for cohort members in the Millennium Cohort Study (MCS). User guide updated: 2025.
Date published: 7 December 2022
Centre for Longitudinal Studies
UCL Social Research Institute
20 Bedford Way
London WC1H 0AL
Email: clsdata@ucl.ac.uk
