The table below provides an overview of the data we collect in ELSA.

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At each wave of ELSA, interviewers have asked respondents to complete a core self-completion questionnaire covering questions such as wellbeing, relationships, alcohol consumption.

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A nurse visit has also been carried out in waves 2, 4, 6, 8 and 9 during which various physical examination and performance data have been obtained, and biological samples collected for analysis.

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Other modules have been added to the main interview in specific waves which are all available on our study documentation page:

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• Wave 3: Self-completion on health and a self-completion on work

• Waves 6 and 8: Self-completion on sexual activity and relationships

• Wave 9: Online nutrition survey.