Norwegian Offshore Petroleum Workers Cohort (NOPW)
The NOPW cohort recruited nearly 28,000 offshore workers in 1998 for prospective follow-up of cancer and cause-specific mortality in Norway. The cohort was based on a list of possible former or current offshore workers for the period of 1965 to 1998 who were invited to fill out and return a comprehensive questionnaire on work history, diet, alcohol, tobacco, education, and other factors possibly related to cancer risk. At baseline, the cohort members were around 43 years old and primarily male (91%). They have since been linked to the Cancer Registry of Norway five times, between 1998 and 2021.
Study design
Cohort - occupational, Cohort
Number of participants at first data collection
27,917 (participants)
Age at first data collection
Varied (participants)
Participant year of birth
1918 - 1979 (participants)
Participant sex
All
Representative sample at baseline?
No
Sample features
Country
Year of first data collection
1998
Primary Institutions
Cancer Registry of Norway (Kreftregisteret)
Profile paper DOI
Funders
Research Council of Norway (Norges forskningsråd)
Ongoing?
Yes
Data types collected
- Secondary data
- Self-report questionnaire – paper or computer assisted
- None
- None
- Employer data
- Healthcare data
- Mortality data
- Other government data
Engagement
Keywords
