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Table 3 Motivations and barriers to participation identified by study participants

From: Learning from older peoples’ reasons for participating in demanding, intensive epidemiological studies: a qualitative study

Motivations to participation
Internal motivations:
- Personal reasons
Checking health status
Comparing own fitness/health to others
Improving future health of own family
Curiosity/interest
Meeting other people/day out
- Altruistic reasons
For future generations
Altruistic attitude in life
Previous experience in helping older people (job related)
To support research
External motivations:
Awareness of being part of a cohort and therefore ‘special’
High quality and good organisation of the study
Well established safety record of the study
Family recognition of the study quality
Being approached/asked
Barriers to participation
Anxiety about the muscle biopsy (pain, loss of independence)
Effort involved in travelling to the clinic