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Yun Yeong Lee 2 Articles
Changes in cancer screening before and during COVID‐19: findings from the Korean National Cancer Screening Survey 2019 and 2020
Thao Thi Kim Trinh, Yun Yeong Lee, Mina Suh, Jae Kwan Jun, Kui Son Choi
Epidemiol Health. 2022;44:e2022051.   Published online May 30, 2022
DOI: https://doi.org/10.4178/epih.e2022051
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Abstract
OBJECTIVES
The coronavirus disease 2019 (COVID-19) pandemic has negatively affected every aspect of medical care. However, information regarding the impact of the pandemic on cancer screening is lacking. This study aimed to explore cancer screening changes by geographic region before and during the pandemic in Korea.
METHODS
Korean National Cancer Screening Survey data for 2019 and 2020 were used. Changes in the screening rate before and during the COVID-19 pandemic were calculated by subtracting the rate in 2020 from the rate in 2019. Multivariate logistic regression analyses examined the differences in screening rates at the national and 16 provincial levels before and after the COVID-19 outbreak.
RESULTS
The 1-year screening rates for the four types of cancer decreased during the pandemic (stomach cancer: -5.1, colorectal cancer: -3.8, breast cancer: -2.5, cervical cancer: -1.5%p). In metropolitan areas, the odds of undergoing screening tests during the pandemic were significantly lower than before the pandemic for stomach (adjusted odds ratio [aOR], 0.66; 95% confidence interval [CI], 0.56 to 0.76), colorectal (aOR, 0.63; 95% CI, 0.50 to 0.79), and breast cancers (aOR, 0.75; 95% CI, 0.60 to 0.94). Furthermore, the likelihood of undergoing stomach cancer screening during the pandemic was significantly lower than before the pandemic in non-metropolitan urban areas (aOR, 0.81; 95% CI, 0.70 to 0.94), while it was higher in rural areas (aOR, 1.54; 95% CI, 1.10 to 2.16).
CONCLUSIONS
Since the COVID-19 pandemic, the cancer screening rate has decreased significantly, especially in large cities. Public health efforts are required to improve cancer screening rates.
Summary
Korean summary
• 코로나 대유행 이전과 이후의 최근 1년간 암검진 수검률을 비교한 결과, 위암 (5% 포인트), 대장암 (3.8% 포인트), 유방암 (2.5% 포인트), 자궁경부암 (1.5% 포인트) 수검률이 통계적으로 유의하게 감소하였음 • 특히 위암, 대장암, 유방암의 경우 대도시 지역에서의 수검률이 현저하게 감소하였음
Key Message
The 1-year screening rates for stomach, colorectal, breast, and cervical cancer decreased significantly during the pandemic in Korea, especially in large cities.
Trends in breast cancer screening rates among Korean women: results from the Korean National Cancer Screening Survey (KNCSS), 2005-2020
Soo Yeon Song, Yun Yeong Lee, Hye Young Shin, Bomi Park, Mina Suh, Kui Son Choi, Jae Kwan Jun
Epidemiol Health. 2022;e2022111.   Published online November 24, 2022
DOI: https://doi.org/10.4178/epih.e2022111    [Accepted]
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AbstractAbstract PDF
Abstract
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.
Summary
Korean summary
Key Message

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