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Regional disparities in major cancer incidence in Korea, 1999-2018
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Eun Hye Park, Mee Joo Kang, Kyu-Won Jung, Eun Hye Park, E Hwa Yun, Hye-Jin Kim, Hyun-Joo Kong, Chang Kyun Choi, Jeong-Soo Im, Hong Gwan Seo, The Community of Population-Based Regional Cancer Registries
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Epidemiol Health. 2023;45:e2023089. Published online October 12, 2023
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DOI: https://doi.org/10.4178/epih.e2023089
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 Abstract
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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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Summary
Korean summary
이 연구는 한국 시군구 단위에서 지난 20년(1999-2018)간 주요 8개 암 발생률의 지역 간 격차를 조사하고, 최근 5년(2014-2018)의 암 발생 군집 가능성을 평가했습니다.
지역 간 격차는 여성에서 갑상선암, 남성에서는 폐암이 가장 큰 격차를 보였습니다. 군집 가능성은 여성의 경우 유방암, 남성의 경우 간암에서 가장 높았습니다.
전국 단위에서는 볼 수 없었던 지역 간 격차 및 군집 발생 가능성이 시군구 단위에서 발견되었고, 이러한 결과는 지역에 맞는 암 정책을 기획하고 실행하는 데 중요한 방향을 제시할 수 있을 것입니다.
Key Message
This study investigated regional disparities in the incidence of eight major cancers in Korea at the municipal level during 1999-2018 and assessed the possibility of cancer clusters during 2014-2018.
Thyroid cancer in women and lung cancer in men showed the most significant regional disparities. Breast cancer in women and liver cancer in men displayed the highest possibility of clustering.
Regional disparities and cancer clusters were identified locally, which were not detected nationally. These findings could provide valuable guidance for developing and implementing cancer policies that are tailored to local needs.
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Citations
Citations to this article as recorded by  - Hormone Replacement Therapy and Risks of Various Cancers in Postmenopausal Women with De Novo or a History of Endometriosis
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Cancers.2024; 16(4): 809. CrossRef - What is the relationship between the local population change and cancer incidence in patients with dyslipidemia: Evidence of the impact of local extinction in Korea
Wonjeong Jeong, Dong‐Woo Choi, Woorim Kim, Kyu‐Tae Han
Cancer Medicine.2024;[Epub] CrossRef
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