ELSA English Longitudinal Study of Ageing Introduction Carli Lessof National Centre for Social...

ELSAEnglish LongitudinalStudy of Ageing

International Centre for Health and Society, UCL

Institute for Fiscal Studies and UCL Dept of Economics

National Centre for Social Research

University of Cambridge, East Anglia, Exeter, Imperial

Research TeamResearch Team


Acknowledgements: The research teamAcknowledgements: The research team James Banks Richard Blundell Elizabeth Breeze Lisa Calderwood Laura Conway Kate Cox María Casanova Bob Erens Edlira Gjonça Elizabeth Hacker Felicia Huppert Martin Hyde Mary Janevic Roger Jowell Saffron Karlsen

Meena Kumari Michelle Lee Carli Lessof Anne McMunn Brenda McWilliams Michael Marmot David Melzer Hayley Mew James Nazroo Susan Nunn Zoë Oldfield Dan Philo Keeley Ribas Nicholas Steel Rebecca Taylor


AcknowledgementsAcknowledgements

Consultants to the study David Blane Mike Hurd Jim Smith Beth Soldo Mike Wadsworth Bob Wallace Bob Willis

Advisory group Baroness Sally Greengross Sir Tony Atkinson Michael Bury Julian Farrand Tom Kirkwood Tom Ross Jacqui Smith Anthea Tinker Christina Victor Alan Walker


Acknowledgements: FundersAcknowledgements: Funders

National Institute on Aging

Department for Education and Skills Department for Environment, Food and Rural Affairs Department of Health Department of Trade and Industry Department for Work and Pensions HM Treasury Inland Revenue Office of the Deputy Prime Minister Office for National Statistics


ELSA is...ELSA is...

A study of people aged 50+ and their younger partners

Multi-disciplinary - health, economic and social circumstances

Longitudinal - change over time

Comparative - United States (HRS) and Europe (SHARE)

Policy relevant - applied research with long term aims

Funding - National Institute on Aging, UK Government Depts


Research QuestionsResearch Questions

What explains who has good health in later life and who does not?

When do people retire and how do they plan for their retirement?

Do people have enough savings to provide for their older age?

How do changes in memory and concentration affect well being?

What is the relationship between all the factors involved in ageing?

HSE 1998& Nurse Visit


The English Longitudinal Study of AgeingThe English Longitudinal Study of Ageing






Sample DesignSample Design

Sample is representative of population aged 50 and over,

living in private households in England

Drawn from Health Survey for England (HSE)

Three years of HSE used - 1998, 1999 & 2001

HSE is an annual cross-section of c.16,000 adults

It has a core content, supplemented by varying modules

Health measures provide ‘pre-baseline’ information

Household response - HSE (74% to 76%)

Individual adult response - HSE (67% to 70%)


HSE Content for ELSA BaselineHSE Content for ELSA Baseline General health Use of health services MRC respiratory questionnaire, chest pain, CVD Physical activity Eating habits, smoking, drinking Height and weight (collected in interview) Waist and hip, demi-span (by nurse) Parental history GHQ12 Blood pressure; blood sample Prescribed drugs; vitamins; nicotine replacements Household composition, housing, job, income


Linkage to administrative data at HSELinkage to administrative data at HSE

NHS Central Register



ELSA Wave One 2002/3Core Interview (12,100 respondents)








Eligibility for the Study at Wave 1Eligibility for the Study at Wave 1

Core sample members born on or before 29th Feb 1952

In household sector in England at baseline (ELSA W1)

Younger partners cohabiting with core sample at HSE

New partners who joined household since HSE

Some data about other household and family members

No interviews in institutions or outside England at baseline


Interview Content and StructureInterview Content and Structure Household demographics

Individual demographics Health Social participation Work and pensions

Income and assets Housing and consumption

Cognitive function Psychosocial health Expectations Final questions

Timed walk Self-completion


Interview Content and StructureInterview Content and Structure Household demographics Answered once per household

Individual demographics] Health ] Answered by all Social participation ] Can be conducted concurrently Work and pensions ]

Income and assets Answered once per financial unit Housing and consumption Answered once per household

Cognitive function ] Psychosocial health ] Answered by all Expectations ] Should be answered in private Final questions ]

Timed walk Answered by 60+, floating block Self-completion Can be left behind or switched


Linkage to administrative data at Wave 1Linkage to administrative data at Wave 1

NHS Central Register

New employers (for private pension plan details)

Hospital Episodes database

National Insurance contributions (post 1978)

Benefits (incl. state pension payments) and tax credits

(post 1999)


ResponseResponse Issued sample of ~11,600 households; ~18,800 individuals

Achieved sample of ~7,900 households; ~12,100 individuals

~11,400 interviews with core sample members

~640 interviews with partners under 50 and ~70 with new partners

Response among core sample members

Household response 70%

96% responding within households

Overall individual response rate of 67%

Individual response rate for new partners 68% Individual response rate for younger partners 63%


Achieved Sample Size - All Sample TypesAchieved Sample Size - All Sample Types Numbers %

Age Men Women Total Men Women Total

Under 50 104 472 576 2 7 5

50-54 920 1156 2076 17 17 17

55-59 1030 1171 2201 19 17 18

60-64 813 883 1696 15 13 14

65-69 806 912 1718 15 13 14

70-74 680 797 1477 13 12 12

75-79 498 596 1094 9 9 9

80+ 485 777 1262 9 11 10

Total 5336 6764 12100 100 100 100


Response and Weighting at Wave 1Response and Weighting at Wave 1

High response to elements within survey Housing 99.7% Income and assets 99.0% Self-completion 92.0%

Imputation for missing values in economic variables

Weighting to take account of household non-response Post-stratified to the relevant population using Census 2001 Applied at individual level





ELSA Wave Two 2004/5Core Interview + Nurse Visit

ELSA Wave Two 2004/5Core Interview + Nurse Visit







Survey Content at Wave 2Survey Content at Wave 2

Core modules remain

Repeat cross-sectional questions Dependent interviewing where prior data is available (Temporary) removal of some questions

Some additions to main questionnaire Date of onset of new conditions and quality of care Job change and retirement House moves Additional consumption questions Loneliness, life satisfaction


Major Changes at Wave 2Major Changes at Wave 2 Nurse visit

sample members only blood pressure; blood samples; saliva sample height & weight; waist & hip; lung function physical performance measures

grip strength, balance, leg rise, chair raises experimental self-completion

Moves into institution

Exit interview

Change to following rules outside of England partners to be followed for at least one wave after splits

ELSA English Longitudinal Study of Ageing Introduction Carli Lessof National Centre for Social...

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