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Original article Trends in breast cancer screening rates among Korean women: results from the Korean National Cancer Screening Survey (KNCSS), 2005-2020
Soo Yeon Song1,2orcid , Yun Yeong Lee1orcid , Hye Young Shin3orcid , Bomi Park4orcid , Mina Suh1,2orcid , Kui Son Choi1,2orcid , Jae Kwan Jun1,2orcid
Epidemiol Health 2022;e2022111
DOI: https://doi.org/10.4178/epih.e2022111 [Accepted]
Published online: November 24, 2022
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1National Cancer Control Institute, National Cancer Center, Goyang, Korea
2Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea
3Department of Nursing, KC University, Seoul, Korea
4Department of Preventive Medicine, College of Medicine, Chung-Ang University, Seoul, Korea
Corresponding author:  Jae Kwan Jun,
Email: jkjun@ncc.re.kr
Received: 21 July 2022   • Revised: 22 November 2022   • Accepted: 24 November 2022

Objectives
Since 2002, the Korean government has provided breast cancer screening as part of the National Cancer Screening Program. This study reported the screening rate trends among Korean women from 2005 to 2020, including organized and opportunistic screening for breast cancer.
Methods
Data from the Korean National Cancer Screening Survey, an annual cross-sectional nationwide survey, was collected using a structured questionnaire between 2005 and 2020. The study population included 23,702 women aged 40–74 years with no history of cancer. We estimated the screening rate with the current recommendation of biennial mammographic screening for breast cancer. In addition, a joinpoint trend analysis was performed for breast cancer screening rates using subgroup analysis.
Results
In 2020, the breast cancer screening rate was 63.5%, which showed an annual increase of 7.72% (95% confidence interval 5.53% to 9.95%) between 2005 and 2012, followed by non-significant trends thereafter. In particular, a significant decrease in the breast cancer screening rate was observed in the subgroups aged 50–59 years old, with 12–15 years of education, and living in rural areas.
Conclusions
Although there has been substantial improve in breast cancer screening rates in Korean women, the recent trend has flattened. Therefore, efforts are continually required to find out unmet subgroups and solve barriers for uptake of breast cancer screening.


Epidemiol Health : Epidemiology and Health