Regional cancer incidence and survival in Denmark

Background

Potential regional differences in cancer incidence and survival would demand targeted interventions to decrease cancer related death.

Methods

This descriptive cohort study provides an overview of regional cancer incidence and relative survival (RS) in Denmark during 2007–2021. National cancer incidence and RS estimates were calculated similar to the official statistics for the Danish Cancer Registry. Specifically, we estimated age-standardized (World) cancer incidence rates (ASR), and RS in 3-year periods by sex, and the five regions of Denmark (i.e., Region of Northern Denmark, Central Denmark Region, Region of Southern Denmark, Region Zealand, and Capital Region).

Results

We identified 578,107 incident cancers in Denmark during 2007–2021, of which 124 123 were diagnosed in 2019–2021. Small fluctuations were seen in ASR for cancer overall in all five regions during 2007–2018, followed by decreasing trends in 2019–2021. Men exhibited higher ASRs than women. Consistent improvements in 1- and 5-year RS were seen during the study period in all regions. However, for patients diagnosed in 2019–2021, the 5-year RS levelled off. These patients experienced 1-year RS of 83 % among men and 84 % among women, and the 5-year RS was also similar between sexes (men: 67 %, women: 70 %, overall: 68 %). Region Zealand generally presented lower RS estimates for both sexes combined.

Conclusion

Cancer survival improved between 2007 and 2021 in all Danish regions for both sexes. However, the improvements in cancer survival appeared to have levelled off in the most recent period, 2019–2021. For both sexes, the lowest survival was suggested for Region Zealand.