BCS70 Age 5 Sweep

Sweep details

Dates 1975
Age 5
Achieved sample 13,135 (cohort members)
Respondents Cohort members, parents, medical examinations
Survey mode Face to face
Data access

Main dataset available via the UK Data Service [SN 2699]. Visit the UK Data Service website to access the data.


The Age 5 Sweep of BCS70 was known as the Child Health and Education Study. The sweep aimed to examine physical, social and cognitive development and to look at experiences of pre-school education and health care.

Health visitors conducted interviews with parents (mothers in most cases) who were also asked to complete a paper questionnaire. Information was collected about family composition, housing, parental employment, cohort member’s health, family health, leisure activities and nursery/playgroup attendance.

Cohort members completed a number of assessments: Copying Designs Test, The English Picture Vocabulary Test (EPVT), Human Figure Drawing Test, Complete a Profile Test, Schonell Reading Test.

The Age 5 Sweep also included a brief medical examination where height and head circumference were measured.

Special features at age 5


BCS70 began measuring cognitive development at age 5, and has continued to track cognition into middle age.

Cognitive assessments have subsequently been included at 10, 16, 42 and 46 with basic skills assessments in literacy and numeracy at 34. The results of these assessments form a rich resource for the study of the factors associated with levels of cognition and the impact of cognition on other domains of life.


  • User guides
  • Questionnaires
  • Technical reports
  • Data notes
  • Additional
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: 03/06/2024
PDF: 1000,62 KB


BCS70 Age 5 Maternal Self-Completion Questionnaire User Guide

User Guide for the BCS70 Age 5 Maternal questionnaire

Date published: 01/05/1975
PDF: 7,26 MB


BCS70 Age 5 Developmental Histories User Guide

User Guide to the BCS Developmental History Data

Date published: 01/07/2014
PDF: 440,55 KB


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: 01/02/2013
PDF: 263,64 KB


BCS70 Age 5 Test Booklet

Test Booklet for BCS age 5 sweep

Date published: 01/05/1975
PDF: 417,38 KB


BCS70 Age 5 Home Interview

Home Interview for the Age 5 Sweep of BCS70

Date published: 01/05/1975


BCS70 Age 5 Developmental Histories Schedule

Development history schedule for Age 5 of BCS70.

Date published: 01/05/1975
PDF: 476,81 KB


BCS Age 5 Test Booklet

Test Booklet for BCS70 Cohort members Age 5. With annotations

Date published: 28/01/2008
PDF: 438,26 KB


BCS70 Age 5 Maternal Self-Completion Survey

Age 5 Maternal Self- Completion Survey for BCS70

Date published: 27/01/2008
PDF: 359,44 KB

Technical reports

No material of this type is available.

Data notes

BCS70 Review of Research on Health Behaviours

Review of research using information from the childhood waves of BCS70 (birth to 16 years) as either health outcomes or as predictors of later health outcomes.

Date published: 01/10/2013
PDF: 1,07 MB


BCS70 Childhood Cognition

An overview of cognitive tests cohort members took at ages 5, 10 and 16

Date published: 01/11/2014
PDF: 2,34 MB


Deriving highest qualification in NCDS and BCS70

This Data Note explains the derivation of variables on Highest Educational Qualification obtained by cohort members in the National Child Development Study (NCDS) and the 1970 British Cohort Study (BCS70).

Date published: 01/01/2011
PDF: 514,11 KB


BCS70 Revised Region Variables (Third Edition)

This User Guide accompanies the deposits at the UK Data Archive of derived variables for each sweep of BCS70. These derived variable datasets are found under the study number for each of the sweeps and include variables for country of interview, region and government office regions.

Date published: 01/02/2014
PDF: 307,78 KB


BCS70 Age 5/7 Variables list and Coding Frame

Variables list and coding frame used for the Age 5 and Age 7 sweeps for BCS70.

Date published: 08/11/1978
PDF: 1,08 MB


BCS70 Age 5 Derived Variables

This User Guide describes the dataset of derived variables for the 1975 sweep of the 1970 British Cohort Study (BCS70).

Date published: 01/02/2013
PDF: 263,64 KB


BCS70 Ethical Review and Consent

Review of Ethical procedures used for each Sweep of BCS70.

Date published: 01/01/2019
PDF: 4,18 MB

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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