Cohorts offshore workers

The Cancer Registry has established two cohorts for offshore workers containing information about people who have worked at Norwegian oil platforms from 1965 to until today.

The Offshore-cohort

The cohort is also 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.

Number: 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» 

The Heliport-cohort

Data collection: From the nine included operator companies, the Cancer Registry will receive an overview of all offshoreworkers who have been offshore since 1980.

Number: data collection is in the planning stages

Period of occupational activity for this cohort: 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), and occupational history (position number, position, start and end of position, whether they work offshore and have shift work).

Related projects: «Benzene-related risk of cancer among offshore workers»