Burden of Obstructive Lung Disease cohort (BOLD)
The BOLD I cohort was comprised of around 30,000 participants from 41 different countries for 13 years, and collected baseline data from 2003 to 2016. Between 2019 and 2021, the BOLD II study was carried out, following up with almost 6,500 participants from 18 of the original sites. The majority of sites were based in low- and middle-income countries (LMICs). The participants were aged over 40 years at recruitment, with approximately 53% being female.
Study design
Cohort
Number of participants at first data collection
6,452 (BOLD II participants)
Age at first data collection
≥ 40 years (participants)
Participant year of birth
Varied (participants)
Participant sex
All
Representative sample at baseline?
The national populations of participating countries in 2003.
Sample features
Countries
Year of first data collection
2003
Primary Institutions
Imperial College London (Imperial, ICL)
Profile paper DOI
Funders
Adamed
Aga Khan University
Agroplon
Air Liquide Healthcare
Altana
Ongoing?
Yes
Data types collected
- Activity log (e.g. food, sleep, exercise)
- Physical or biological assessment (e.g. blood, saliva, gait, grip strength, anthropometry)
- Secondary data
- Self-report questionnaire – paper or computer assisted
- None
- None
- Employer data
- Geographic, spatial & environmental data
Engagement
Keywords
