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.

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User guides

Handling missing data in the CLS cohort studies – User Guide

This user guide aims to describe and illustrate a straightforward approach to missing data handling, while detailing some more general considerations around missing data along the way.


Date published: 3 June 2024
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User guides

BCS70 Activity Histories (1986-2013) Guide


Date published: 1 July 2017
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User guides

BCS70 Partnership Histories (1986-2013) Guide


Date published: 1 October 2016
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User guides

BCS70 Age 5 Developmental Histories User Guide

User Guide to the BCS Developmental History Data


Date published: 1 July 2014
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Derived variables

BCS70 Age 5 Sweep Derived Variables

A description of the derived variables in the age 5 sweep of the 1970 British Cohort Study


Date published: 1 February 2013
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User guides

BCS70 Age 38 User Guide

Guide to the dataset for the BCS70 age 38 survey


Date published: 1 August 2010
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User guides

NCDS6/BCS 2000- Guide to the Combined Dataset


Date published: 1 June 2001
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User guides

BCS70 Age 26 Guide to the Data

Guide to the 26 year follow up for BCS70


Date published: 1 May 1996
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User guides

BCS70 Age 5 Maternal Self-Completion Questionnaire User Guide

User Guide for the BCS70 Age 5 Maternal questionnaire


Date published: 1 May 1975
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Survey reports

BCS70 Birth Sweep Survey Report

Report for the initial sweep of BCS70


Date published: 1 May 1970
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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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