Second Duke Longitudinal Study (DLS - II)
The DLS–II aimed to examine normal development from middle to old age and identify the "normal" psychological, social, and biomedical changes that characterize middle and later life. It was initiated to complement features of the First Duke Longitudinal Study (DLS – I) by including a younger sample of late middle-aged adults. Participants in DLS-II were selected from a list of Durham, North Carolina area subscribers to a health insurance provider. There were around 500 participants at baseline, aged from their mid-40s to early-70s. Data were collected in four waves over six years: 1968-1970, 1970-1972, 1972-1974, and 1974-1976.
Study design
Cohort
Number of participants at first data collection
502 (participants)
Age at first data collection
45 - 71 (participants)
Participant year of birth
Varied (participants)
Participant sex
All
Representative sample at baseline?
No
Sample features
Country
Year of first data collection
1968
Primary Institutions
Duke University
Profile paper DOI
Funders
National Institutes of Health (NIH)
Ongoing?
No
Data types collected
- Interview – unspecified
- Physical or biological assessment (e.g. blood, saliva, gait, grip strength, anthropometry)
- Self-report questionnaire – unspecified
- None
- Electroencephalography (EEG)
- None
Engagement
Keywords
Consortia and dataset groups
