Epidemiol Health.
2023;45(1):e2023089. 10.4178/epih.e2023089.
Regional disparities in major cancer incidence in Korea, 1999-2018
- Park EH
1,2,3 - Kang MJ1,2
- Jung KW1,2
- Park EH1,2
- Yun EH1,2
- Kim HJ1,2
- Kong HJ1,2
- Choi CK1,2
- Im JS4
- Seo HG1,5
- The Community of Population-Based Regional Cancer Registries
- Affiliations
-
- 1Korea Central Cancer Registry, National Cancer Center, Goyang, Korea
- 2Division of Cancer Registration and Surveillance, National Cancer Control Institute, National Cancer Center, Goyang, Korea
- 3Graduate School of Public Health, Seoul National University, Seoul, Korea
- 4National Cancer Control Institute, National Cancer Center, Goyang, Korea
- 5National Cancer Center Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea
- KMID: 2552292
- DOI: http://doi.org/10.4178/epih.e2023089
Abstract
OBJECTIVES
This study investigated regional disparities in the incidence of 8 major cancers at the municipal level in Korea during 1999-2018 and evaluated the presence or absence of hot spots of cancer clusters during 2014-2018.
METHODS
The Korea National Cancer Incidence Database was used. Age-standardized incidence rates were calculated by gender and region at the municipal level for 4 periods of 5 years and 8 cancer types. Regional disparities were calculated as both absolute and relative measures. The possibility of clusters was examined using global Moran’s I with a spatial weight matrix based on adjacency or distance.
RESULTS
Regional disparities varied depending on cancer type and gender during the 20-year study period. For men, the regional disparities of stomach, colon and rectum, lung, and liver cancer declined, and those of thyroid and prostate cancer recently decreased, despite an overall increasing incidence. For women, regional disparities in stomach, colon and rectum, lung, liver, and cervical cancer declined, that of thyroid cancer recently decreased, despite an overall increasing incidence, and that of breast cancer steadily increased. In 2014-2018, breast cancer (I, 0.61; 95% confidence interval [CI], 0.53 to 0.70) showed a high probability of cancer clusters in women, and liver cancer (I, 0.48; 95% CI, 0.40 to 0.56) showed a high probability of cancer clusters in men.
CONCLUSIONS
Disparities in cancer incidence that were not seen at the national level were discovered at the municipal level. These results could provide important directions for planning and implementing local cancer policies.
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