Cohorts in the study Cancer among norwegian offshore workers
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The Cancer Registry has two established cohorts for offshore workers that contain information about people who have worked on Norwegian oil platforms from 1965 to the present day.
The NOPW cohort
The cohort is called the NOPW-cohort,which is an abbreviation of «Norwegian Offshore Petroleum Workers»
Data collection
Through questionnaires delivered to individual who were believed to have worked offshore in the period 1965-1998. The survey was conducted in 1998.
Participants
28 000 offshore workers.
Period
1965-1998
Type of data
The data were self-reported through questionnaires. The questionnaire included questions about occupational history, socioeconomic conditions (marital status, education, children), lifestyle (diet, tobacco, alcohol, physical activity) and working environment factors such as exposure to fiber, dust and chemicals.
Related projects
- Exposure-related risks of cancer in petroleum workers
- Kartlegging av kreftrisiko og årsakspesifikk dødelighet blant ansatte i norsk offshorevirksomhet - Innsamling av bakgrunnsdata og etablering av kohort». A detailed description of the Offshore cohort's background and procedure for establishing the cohort can be found in the Norwegian Cancer Registry's research report nr. 1, 2001 (in Norwegian)
The Heliport-cohort
The cohort is based on the records of helicopter transport to and from the oilplatforms, and is therefore called the heliport cohort.
Data collection
From nine included operator companies, the Norwegian Cancer Registry has received an overview of all offshoreworkers who have been offshore since 1980. In addition we are conducting a survey, that is send directly to the offshore workers.
Participants
About 83 000.
Period
1980–2020
Type of data
Personal data (company, name, national identity number, telephone, education, position, job category), transport data (position, role, purpose, travel number, exit/entry, and length of stay on offshore installation, shift plan, status of stay), occupational history (position number, position, start and end of position, whether they work offshore and have shift work) and lifestyle factors (diet, physical activity, sun exposure, sleep, alcohol, tobacco).