Existing data sources in clinical epidemiology: The Scandinavian Thrombosis and Cancer Cohort
AuthorJensvoll, Hilde; Severinsen, Marianne T.; Hammerstrøm, Jens; Brækkan, Sigrid Kufaas; Kristensen, Søren R.; Cannegieter, Suzanne C.; Blix, Kristine; Tjønneland, Anne; Rosendaal, Frits Richard; Dziewiecka, Olga; Overvad, Kim; Næss, Inger Anne; Hansen, John-Bjarne
Methods: The STAC cohort includes 144,952 subjects aged 19–101 years without previous VTE or cancer. Baseline information collected in 1993–1997 included physical examination, self-administered questionnaires, and blood samples. Validated VTE events and cancer diagnoses were registered up to 2007–2012.
Results: There were 2,444 VTE events (1.4 per 1,000 person-years [PY]) during follow-up, and the incidence increased exponentially from 0.3 per 1,000 PY in subjects aged 20–29 years to 6.4 per 1,000 PY in subjects aged 80+. Overall, 51% of the VTE events were provoked, and cancer was the most common provoking factor (19%), followed by immobilization and surgery (both 15%). In total, 19,757 subjects developed cancer during follow-up (9.8 per 1,000 PY), and the 5-year age-specific incidence rates of cancer were coherent with corresponding rates from the Norwegian Cancer Registry.
Conclusion: The STAC cohort will provide a unique opportunity to explore the epidemiology and impact of genetic and environmental patient-related and cancer-specific risk factors for VTE in the general population.