{
  "abstract": "Objective The updated Nordic Occupational Cancer Study (NOCCA) includes birth cohorts from 1896 to 1980, adds new job categories, and provides 60 years of follow-up from 1961 to 2020. Based on data from 22 million individuals and 4.5 million cancer cases across the Nordic countries, the study offers a unique opportunity to examine both rare and common cancers across a large population. For example, it includes 4,000 cases of mycosis fungoides, and 440,000 cases of lung cancer. The 60 occupational categories can be classified by socioeconomic position (SEP), a key determinant of cancer burden. Individuals in lower SEP-groups have higher rates of smoking-related cancers, while higher SEP-groups show increased incidence of breast, colon, and skin cancers. This presentation highlights breast cancer in women, colon cancer in men, and melanoma in both sexes to illustrate SEP-related disparities.Methods and Analysis By combining occupational history with long-term cancer registry data, NOCCA allows for the assessment of cancer risk across specific socioeconomic and occupational groups, including trends over time and between countries. The standardized incidence ratio (SIR), calculated as the ratio of observed to expected cancer cases using rates from the Nordic populations, was estimated.Results SIR for breast cancer ranges from 0.89 in the lowest SEP-group to 1.15 in the highest. For colon cancer, the SIR varies from 1.00 to 1.07. In contrast, melanoma shows a wider range, with SIRs spanning from 0.81 to 1.28.Conclusion Breast cancer risk increases with socioeconomic position, likely influenced by lifestyle and reproductive factors. Colon cancer shows only a modest variation by SEP, though it may be associated with sedentary occupations. Melanoma presents the strongest SEP gradient, with higher incidence in more advantaged groups, potentially reflecting greater UV exposure. These patterns reveal how socioeconomic factors contribute to variations in cancer risk.",
  "authors": [
    {
      "affiliations": [
        "Cancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway. Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research, Helsinki, Finland. Danish Cancer Society Research Center, Copenhagen, Denmark. Nykøbing Falster Hospital, University of Copenhagen, Copenhagen, Denmark. Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavík, Iceland. National Institute of Occupational Health (STAMI), Oslo, Norway. Institute of Health and Society, University of Oslo, Oslo, Norway. Institute of Environmental Medicine, IMM Karolinska Institutet, Stockholm, Sweden. Health Sciences Unit, Faculty of Social Sciences, Tampere University, Tampere, Finland"
      ],
      "name": "Jan Ivar Martinsen"
    },
    {
      "affiliations": [
        "Cancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway. Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research, Helsinki, Finland. Danish Cancer Society Research Center, Copenhagen, Denmark. Nykøbing Falster Hospital, University of Copenhagen, Copenhagen, Denmark. Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavík, Iceland. National Institute of Occupational Health (STAMI), Oslo, Norway. Institute of Health and Society, University of Oslo, Oslo, Norway. Institute of Environmental Medicine, IMM Karolinska Institutet, Stockholm, Sweden. Health Sciences Unit, Faculty of Social Sciences, Tampere University, Tampere, Finland"
      ],
      "name": "Sanna Heikkinen"
    },
    {
      "affiliations": [
        "Cancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway. Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research, Helsinki, Finland. Danish Cancer Society Research Center, Copenhagen, Denmark. Nykøbing Falster Hospital, University of Copenhagen, Copenhagen, Denmark. Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavík, Iceland. National Institute of Occupational Health (STAMI), Oslo, Norway. Institute of Health and Society, University of Oslo, Oslo, Norway. Institute of Environmental Medicine, IMM Karolinska Institutet, Stockholm, Sweden. Health Sciences Unit, Faculty of Social Sciences, Tampere University, Tampere, Finland"
      ],
      "name": "Johnni Hansen"
    },
    {
      "affiliations": [
        "Cancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway. Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research, Helsinki, Finland. Danish Cancer Society Research Center, Copenhagen, Denmark. Nykøbing Falster Hospital, University of Copenhagen, Copenhagen, Denmark. Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavík, Iceland. National Institute of Occupational Health (STAMI), Oslo, Norway. Institute of Health and Society, University of Oslo, Oslo, Norway. Institute of Environmental Medicine, IMM Karolinska Institutet, Stockholm, Sweden. Health Sciences Unit, Faculty of Social Sciences, Tampere University, Tampere, Finland"
      ],
      "name": "Elsebeth Lynge"
    },
    {
      "affiliations": [
        "Cancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway. Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research, Helsinki, Finland. Danish Cancer Society Research Center, Copenhagen, Denmark. Nykøbing Falster Hospital, University of Copenhagen, Copenhagen, Denmark. Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavík, Iceland. National Institute of Occupational Health (STAMI), Oslo, Norway. Institute of Health and Society, University of Oslo, Oslo, Norway. Institute of Environmental Medicine, IMM Karolinska Institutet, Stockholm, Sweden. Health Sciences Unit, Faculty of Social Sciences, Tampere University, Tampere, Finland"
      ],
      "name": "Jóhanna Eyrún Torfadóttir"
    },
    {
      "affiliations": [
        "Cancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway. Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research, Helsinki, Finland. Danish Cancer Society Research Center, Copenhagen, Denmark. Nykøbing Falster Hospital, University of Copenhagen, Copenhagen, Denmark. Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavík, Iceland. National Institute of Occupational Health (STAMI), Oslo, Norway. Institute of Health and Society, University of Oslo, Oslo, Norway. Institute of Environmental Medicine, IMM Karolinska Institutet, Stockholm, Sweden. Health Sciences Unit, Faculty of Social Sciences, Tampere University, Tampere, Finland"
      ],
      "name": "Ingrid Sivesind Mehlum"
    },
    {
      "affiliations": [
        "Cancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway. Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research, Helsinki, Finland. Danish Cancer Society Research Center, Copenhagen, Denmark. Nykøbing Falster Hospital, University of Copenhagen, Copenhagen, Denmark. Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavík, Iceland. National Institute of Occupational Health (STAMI), Oslo, Norway. Institute of Health and Society, University of Oslo, Oslo, Norway. Institute of Environmental Medicine, IMM Karolinska Institutet, Stockholm, Sweden. Health Sciences Unit, Faculty of Social Sciences, Tampere University, Tampere, Finland"
      ],
      "name": "Jenny Selander"
    },
    {
      "affiliations": [
        "Cancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway. Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research, Helsinki, Finland. Danish Cancer Society Research Center, Copenhagen, Denmark. Nykøbing Falster Hospital, University of Copenhagen, Copenhagen, Denmark. Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavík, Iceland. National Institute of Occupational Health (STAMI), Oslo, Norway. Institute of Health and Society, University of Oslo, Oslo, Norway. Institute of Environmental Medicine, IMM Karolinska Institutet, Stockholm, Sweden. Health Sciences Unit, Faculty of Social Sciences, Tampere University, Tampere, Finland"
      ],
      "name": "Marcin W Wojewodzic"
    },
    {
      "affiliations": [
        "Cancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway. Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research, Helsinki, Finland. Danish Cancer Society Research Center, Copenhagen, Denmark. Nykøbing Falster Hospital, University of Copenhagen, Copenhagen, Denmark. Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavík, Iceland. National Institute of Occupational Health (STAMI), Oslo, Norway. Institute of Health and Society, University of Oslo, Oslo, Norway. Institute of Environmental Medicine, IMM Karolinska Institutet, Stockholm, Sweden. Health Sciences Unit, Faculty of Social Sciences, Tampere University, Tampere, Finland"
      ],
      "name": "Eero Pukkala"
    }
  ],
  "title": "8286923 Social variance in cancer incidence, results from the new Nordic occupational cancer study",
  "uid": "ff333b9e-cef6-5d57-a17a-2a05a234c870"
}