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TILDA – The Irish Longitudinal Study on Ageing
Patricia M Kearney
Trinity College Dublin
EU Commission Seminar Series – How should we plan for Europe’s ageing population
April 24th 2008
Overview
• Background– Ageing– Ageing in Ireland
• TILDA– Study Design– Data Collection– Domains
• International Comparability– HRS– ELSA– SHARE
Background & Need for Research
One of the greatest success stories of modern times is the increasing number of
people living into old age
However this triumph of humanity is also one of our greatest challenges
GenesGenes
NutritionNutrition
Family Networks
Family Networks
Social Participation
Social Participation
EducationEducation
Household Structure
Household Structure
Marital Status
Marital Status
Work and Retirement
Work and Retirement
Income and
assets
Income and
assets
Mental health
Mental health
HealthHealth
Experience Experience of of
AgeingAgeing
Experience Experience of of
AgeingAgeing
Factors Affecting the Experience of Ageing
Age Pyramid for World Population
0 100 200 300 400 500 600 700
0- 4
10-14
20-24
30-34
40-44
50-54
60-64
70-74
80+
Age (
years
)
Population (millions)
2050
2025
2000
Age Pyramid for Irish Population
0 50 100 150 200 250 300 350 400
0- 4
10-14
20-24
30-34
40-44
50-54
60-64
70-74
80-84
90-94
100+
Age (
year
s)
Population (thousands)
2050
2025
2000
Source: US census bureau International database
Ageing
• Ageing on this scale is an unprecedented phenomenon in human history
• Ageing is pervasive and global as it affects everyone, both the young and the old
• Significant consequences for society• Predicted that of the female children born
today in the richest countries, over 50 % will survive to the age of 100 and beyond
Ageing in Ireland
• Proportion of population ≥65 has remained steady at about 11% for the past 40 years
• It is projected that this proportion will rise to 20-25% by 2036 (CSO 2006)
• The greatest increase will be in the oldest old
TILDA
• First longitudinal study of ageing conducted in Ireland
• Cross-institutional consortium of partners with a prior track-record in age-related research
• Wide range of research groups from many disciplines involved in TILDA emphasizing the interest from all quarters for strategic ageing research
TILDA• Overall aim is to examine ageing as a dynamic process
• Our health measures will emphasise successful ageing rather than focusing on disease and disability
• The longitudinal design will allow us
- capture health transitions/trajectories
- capture profiles of aging
- identify modifiable factors for interventions
- provide a platform for future research
Key Multi-disciplinary Questions
• What changes occur in physical, psychological and cognitive function over time and across ages?
• What are the physical, social and economic factors that condition these changes?
• What are the adaptive responses to change and how do these contribute to successful ageing?
Study Design
• Longitudinal Cohort Study
• Nationally representative sample
• Approximately 10,000
• Aged >50 years
• Minimum follow-up 10 years
• Collaboration from institutions across Ireland
Data Collection
• TILDA will combine a number of data collection strategies– Face-to-face Interviews– Clinical Assessments
• Nurse visit/Bus/Clinical centre
– Data Linkage
TILDA
• Health
• Social
• Economic
Health Measures in TILDA
Physical Health Cognition Psychological Behavioural Health care
Self reported
Measures of physical performance
Objective measures of physical health
Functional ability
Memory
Executive function
Basic skills
Depression
Anxiety & Worry
QOL
Well being
Life satisfaction
Physical Activity
Alcohol
Smoking
Sleep
Quality of healthcare
Access to healthcare
Healthcare Utilisation
Economic Measures in TILDA
Work, pensions and retirement
Income and wealth
Healthcare costs and utilisation
Housing
Social Measures in TILDA
• Social Networks/Supports
• Loneliness
• Stressful Life Events
• Quality of Relationships
• Social Engagement
International Collaborations
TILDA’s study design has evolved from and is in collaboration with other leading longitudinal studies
• The Health & Retirement Study (HRS) US
• The English Longitudinal Study on Ageing (ELSA)
• The Survey of Health & Retirement in Europe (SHARE)
TILDA – role in planning for our ageing population
TILDA
Evidence based research on ageing in Ireland
Policy implications for health and social services
International Comparative Analysis