Epidemiology and Health

Original Article

Socioeconomic inequality in organized and opportunistic screening for colorectal cancer: results from the Korean National Cancer Screening Survey, 2009-2021: Xuan Quy Luu, Kyeongmin Lee, Jae Kwan Jun, Mina Suh, Kui Son Choi; Epidemiol Health. 2023;45:e2023086. Published online September 17, 2023; DOI: https://doi.org/10.4178/epih.e2023086

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Abstract

OBJECTIVES
This study aimed to investigate socioeconomic status (SES)-based inequality in colorectal cancer (CRC) screening in Korea. We assessed whether the rates of opportunistic and organized CRC screening differed according to income and education levels.

METHODS

We analyzed data from the Korean National Cancer Screening Survey of 27,654 cancer-free individuals, aged 50-74 years, from 2009 to 2021. The weighted cancer screening rates with trends were estimated with the average annual percentage change using joinpoint regression. Inequality was calculated in both relative and absolute terms, based on a Poisson regression model.

RESULTS

The organized screening rate increased significantly from 22.1% in 2009 to 53.1% in 2020 and 50.6% in 2021, with an average annual change of 8.6% (95% confidence interval [CI], 4.9 to 12.5). In contrast, no significant trend was observed for opportunistic screening. The SES inequality in opportunistic screening uptake was indicated by a slope index of inequality (SII) of 9.74% (95% CI, 6.36 to 13.12), relative index of inequality (RII) of 2.18 (95% CI, 1.75 to 2.70) in terms of education level; and an SII of 7.03% (95% CI, 4.09 to 9.98), RII of 1.81 (95% CI, 1.41 to 2.31) in terms of measured income. Although there was an increasing trend in income inequality, no significant SES inequalities were observed in the overall estimates for organized screening.

CONCLUSIONS

Organized CRC screening is effective in improving the participation rate, regardless of SES. However, significant inequalities were found in opportunistic screening, suggesting room for improvement in the overall equity of CRC screening.

Summary

Korean summary
이번 연구는 한국의 대장암 검진에서 사회경제적 수준에 따른 불평등이 있는지를 분석했다. 국가암검진사업 도입 이래로 2009-2021년 연구기간 동안 공공검진을 통한 대장암 수검률은 지속적으로 증가한 반면, 개인검진의 증가는 관찰되지 않았다. 특히 공공 검진의 경우 소득이나 교육수준에 따른 수검률에 차이는 없는 반면, 개인검진에서는 상당한불평등이 관찰되었다.

Key Message
"The study investigated socioeconomic status (SES)-based inequality in colorectal cancer (CRC) screening in Korea. We found that the introduction of the National Cancer Screening Program for CRC effectively increased the participation rate, regardless of the SES of the individuals throughout the study period. However, significant inequalities were observed in opportunistic screening related to education and income."

Citations

Citations to this article as recorded by

Disparities in Cancer Incidence across Income Levels in South Korea
Su-Min Jeong, Kyu-Won Jung, Juwon Park, Nayeon Kim, Dong Wook Shin, Mina Suh
Cancers.2023; 15(24): 5898. CrossRef

Cohort Profile

Integrated database-based Screening Cohort for Asian Nomadic descendants in China (Scan-China): Insights on prospective ethnicity-focused cancer screening: Yuelin Yu, Liying Qiao, Jing Han, Weiwei Wang, Weiwei Kang, Yunjing Zhang, Shu Shang, Ruogu Meng, Lin Zhuo, Siyan Zhan, Yunfeng Xi, Shengfeng Wang; Epidemiol Health. 2023;45:e2023048. Published online April 18, 2023; DOI: https://doi.org/10.4178/epih.e2023048

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Established in 2017, the Screening Cohort for Asian Nomadic descendants in China (Scan-China) has benefited over 180,000 members of a multi-ethnic population, particularly individuals of Mongolian descent compared with the general population (Han ethnicity), in the Inner Mongolia Autonomous Region, China. This cohort study aims to evaluate the effectiveness of cancer screening and serve as a real-world data platform for cancer studies. The 6 most prevalent cancers in China are considered—namely, breast, lung, colorectal, gastric, liver and esophageal cancer. After baseline cancer risk assessments and screening tests, both active and passive follow-up (based on the healthcare insurance database, cancer registry, the front page of hospital medical records, and death certificates) will be conducted to trace participants’ onset and progression of cancers and other prevalent chronic diseases. Scan-China has preliminarily found a disproportionately lower screening participation rate and higher incidence/mortality rates of esophageal and breast cancer among the Mongolian population than among their Han counterparts. Further research will explore the cancer burden, natural history, treatment patterns, and risk factors of the target cancers.; Summary

Key Message
- Scan-China is the first and largest electronic health data (EHD)-integrated cancer screening program for the Mongolian ethnicity in Inner Mongolia. - Scan-China aims to evaluate the effectiveness of screening interventions, particularly on ethnic minorities, portray the natural history, explore risk factors and summarize treatment patterns and updated outcomes of prevalent tumors/other chronic diseases. - Scan-China database comprises baseline cancer risk assessment, screening tests results, active follow-up investigation for participants at high risk and EHD-integrated passive follow-up. Data sources for passive follow-up include healthcare insurance database, cancer registry, front page of hospital medical record and death certificates.

Original Articles

Trends in breast cancer screening rates among Korean women: results from the Korean National Cancer Screening Survey, 2005-2020: Soo Yeon Song, Yun Yeong Lee, Hye Young Shin, Bomi Park, Mina Suh, Kui Son Choi, Jae Kwan Jun; Epidemiol Health. 2022;44:e2022111. Published online November 24, 2022; DOI: https://doi.org/10.4178/epih.e2022111

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Abstract

OBJECTIVES
Since 2002, the Korean government has provided breast cancer screening as part of the National Cancer Screening Program. This study reported trends in the screening rate 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, were 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 based on the current recommendation of biennial mammographic screening for breast cancer. In addition, a joinpoint trend analysis was performed for breast cancer screening rates among various subgroups.

RESULTS

In 2020, the breast cancer screening rate was 63.5%, reflecting 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 improvement in breast cancer screening rates in Korean women, the trend has flattened in recent years. Therefore, continual efforts are required to identify subgroups with unmet needs and solve barriers to the uptake of breast cancer screening.

Summary

Korean summary
본 연구는 2005년에서 2020년까지 암검진수검행태조사 자료를 이용하여 40세 이상의 우리나라 여성의 유방암 검진 수검률이 추이에 대해 분석하였다. 우리나라 유방암 검진 수검률은 2020년 현재 63.5%이다. 하지만 지속적으로 증가하던 유방암 검진 수검률의 추이는 2012년 이후 정체되어 있으며 일부 사회경제적 계층에서는 감소하는 경향을 보였다.

Key Message
In Korea, despite of the high level of breast cancer screening rate, decreasing trends in some socioeconomic classes after 2012. Continual efforts are required to identify subgroup with unmet needs and barriers to the uptake of breast cancer screening.

Citations

Citations to this article as recorded by

Why is the screening rate in lung cancer still low? A seven-country analysis of the factors affecting adoption
Charlotte Poon, Tim Wilsdon, Iqra Sarwar, Alexander Roediger, Megan Yuan
Frontiers in Public Health.2023;[Epub] CrossRef
Mammographic Breast Density and Risk of Ovarian Cancer in Korean Women
Thi Xuan Mai Tran, Soyeoun Kim, Boyoung Park
Cancer Epidemiology, Biomarkers & Prevention.2023; 32(12): 1690. CrossRef

Effect of mammography screening on the long-term survival of breast cancer patients: results from the National Cancer Screening Program in Korea: Xuan Quy Luu, Kyeongmin Lee, Jae Kwan Jun, Mina Suh, Kyu-Won Jung, Kui Son Choi; Epidemiol Health. 2022;44:e2022094. Published online October 26, 2022; DOI: https://doi.org/10.4178/epih.e2022094

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Abstract PDF Supplementary Material: Abstract
OBJECTIVES
This study investigated the effect of mammography screening on the long-term survival of breast cancer (BC) patients aged 40 years or older according to their screening history and duration since screening.
METHODS
The study cohort was organized from 3 nationwide databases of the Korean National Cancer Screening Program, the Korean Central Cancer Registry, and death certificates. We included 24,387 women diagnosed with invasive BC or ductal carcinoma in situ in 2008 and 2009 and followed up until December 31, 2019. Cox proportional-hazards regression was used to investigate the effect of BC screening on the risk of death.
RESULTS
Overall, 20,916 of 24,387 patients (85.8%) were alive at the end of the follow-up period (median: 10.5 years). The long-term survival rate was significantly lower in the never-screened group (80.3%) than in the screened group (88.9%) (p<0.001). A 35% reduction in the risk of BC death (hazard ratio [HR], 0.65; 95% confidence interval [CI], 0.60 to 0.70) from screening was observed. A subgroup analysis according to the cancer stage showed 62%, 36%, and 24% lower risks of BC death for the localized stage, regional stage, and distant stage, respectively. Women aged 40-49 years received the least benefit from BC screening (HR, 0.71; 95% CI, 0.62 to 0.81).
CONCLUSIONS
Mammography screening was effective in reducing the risk of BC-specific death in Asian women across all cancer stages. However, this effect was relatively small among women in their 40s, suggesting that more detailed and specialized screening strategies are needed for that age group.; Summary

Effect of Pap smears on the long-term survival of cervical cancer patients: a nationwide population-based cohort study in Korea: Xuan Quy Luu, Kyeongmin Lee, Jae Kwan Jun, Mina Suh, kyu-won Jung, Myong Cheol Lim, Kui Son Choi; Epidemiol Health. 2022;44:e2022072. Published online September 7, 2022; DOI: https://doi.org/10.4178/epih.e2022072

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Abstract Summary PDF Supplementary Material: Abstract
OBJECTIVES
This study aimed to investigate the effect of cervical cancer screening by Papanicolaou (Pap) smears on the long-term survival of cervical cancer patients.
METHODS
We constructed a retrospective cohort of 14,903 women diagnosed with invasive cancer or carcinoma in situ in 2008 and 2009 and followed up until December 31, 2019, by using individual-level data from 3 national databases of the Korean National Cancer Screening Program, the Korean Central Cancer Registry, and death certificates. Cox proportional-hazards regression was used to investigate the effect of cervical cancer screening on mortality.
RESULTS
In total, 12,987 out of 14,867 patients (87.4%) were alive at the end of the follow-up period (median: 10.5 years). Screened patients had a 38% lower risk of cervical cancer death than never-screened patients (hazard ratio [HR], 0.62; 95% confidence interval [CI], 0.54 to 0.70). Screening was associated with 59% and 35% lower risks of death, respectively, in screened patients with localized and regional stages. Furthermore, lower HRs among women who received screening were observed in all age groups, especially women aged 50–59 years (HR, 0.54; 95% CI, 0.42 to 0.69). The lowest HR for cervical cancer death was reported among patients screened within the past 2 years (HR, 0.54; 95% CI, 0.47 to 0.63), and the HRs increased with increasing time intervals.
CONCLUSIONS
Pap smear screening significantly reduced the risk of cervical cancer-specific death in Korean women across all cancer stages.; Summary

Korean summary
한국은 자궁경부암 발생과 사망을 낮추기 위하여 국가암검진사업으로 자궁경부암 검진을 실시하고 있다. 이 연구는 2008-2009년 자궁경부암 진단을 받은 30세-79세 14,903명을 대상으로 과거 자궁경부세포검진 여부에 따른 장기생존율을 추적 조사하였다. 그 결과 자궁경부암 검진을 받은 환자에서 사망 위험비가 약 38% 낮았으며, 2년 이내에 검진을 받은 환자군에서 사망 위험이 가장 낮았다.

Key Message
The Korean National Cancer Screening Program (KNCSP) has provided cervical cancer screening by Pap smear test. However, the survival, particularly long-term survival of cervical cancer patients, has never been evaluated in the KNCSP. This study reports a significant improvement in the long-term survival of screened cervical cancer patients, which persist in subgroup analysis by cancer stage. Patients who were screened within two years before the diagnosis had the best survival.

The impact of COVID-19 on screening for colorectal, gastric, breast, and cervical cancer in Korea: Hyeree Park, Seung Hee Seo, Jong Heon Park, Shin Hye Yoo, Bhumsuk Keam, Aesun Shin; Epidemiol Health. 2022;44:e2022053. Published online June 21, 2022; DOI: https://doi.org/10.4178/epih.e2022053

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
The coronavirus disease 2019 (COVID-19) pandemic has affected the utilization of healthcare services, including participation in cancer screening programs. We compared cancer screening participation rates for colorectal, gastric, breast, and cervical cancers among participants in the National Cancer Screening Program (NCSP) in 2019 and 2020 to address the potential distraction effect of COVID-19 on cancer screening.

METHODS

Data from the NCSP for 4 cancer types (stomach, colorectal, breast, and cervical) in 2019 and 2020 were used to calculate cancer screening participation rates by calendar month, gender, age group, and geographical region. Monthly participation rates were analyzed per 1,000 eligible individuals.

RESULTS

The screening participation rate decreased in 2020 compared to 2019 for all 4 cancers: colorectal (40.5 vs. 35.3%), gastric (61.9 vs. 54.6%), breast (63.8 vs. 55.8%), and cervical (57.8 vs. 52.2%) cancers. Following 2 major COVID-19 waves in March and December 2020, the participation rates in the 4 types of cancer screening dropped compared with those in 2019. The highest decline was observed in the elderly population aged 80 years and older (percentage change: -21% for colorectal cancer; -20% for gastric cancer; -26% for breast cancer; -20% for cervical cancer).

CONCLUSIONS

After the 2 major COVID-19 waves, the screening participation rate for 4 types of cancer declined compared with 2019. Further studies are needed to identify the indirect effects of the COVID-19 pandemic on cancer patients, such as delayed diagnoses of cancer or excess cancer deaths.

Summary

Korean summary
본 연구는 코로나 대유행 기간 전과 후 대장암, 위암, 유방암, 자궁경부암 검진 수검률 차이를 비교하고자 하였다. 첫 코로나 확진자가 발생한 2020년을 코로나 대유행 기간, 전년도 기간인 2019년을 코로나 대유행 전 기간으로 설정하며 국민건강보험공단에서 집계된 전수자료를 이용하여 암 검진 대상자 수와 수검자 수를 비교 분석하였다. 4개 암종 모두에서 2019년도와 비교하여 2020년도에 전국적으로 수검률이 감소하는 경향이 있었으며, 1차 대유행이 있었던 3월과 3차 대유행 시기인 12월에 2019년도 동기간과 비교하여 수검률이 크게 감소하였고, 80대 이상 노인 인구에서 감소폭이 다른 연령대와 비교하여 크게 나타났다.

Key Message
We found decline of the colorectal, gastric, breast and cervical cancer screening participation rates in 2020 following the two major COVID-19 waves, compared with those of 2019, and the highest decline was observed in the elderly population aged 80 years and older.

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Decline in Cancer Diagnoses during the ‘Zero COVID’ Policy in Hong Kong: Indirect Spillover Impact of the COVID-19 Pandemic
H.M. Youn, Y. Zhang, A. Liu, C.S. Ng, J. Liang, G.K.K. Lau, S.F. Lee, J. Lok, C.L.K. Lam, E.Y.F. Wan, J. Quan
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Impact of coronavirus disease 2019 on cancer care: How the pandemic has changed cancer utilization and expenditures
Jinah Sim, Jihye Shin, Hyun Jeong Lee, Yeonseung Lee, Young Ae Kim, Chong-Chi Chiu
PLOS ONE.2024; 19(2): e0296808. CrossRef
Access to colorectal cancer screening in populations in China, 2020: A coverage‐focused synthesis analysis
Yan‐Jie Li, Xin Wang, Yu‐Jie Wu, Xin‐Yi Zhou, Jibin Li, Jiangmei Qin, Wanghong Xu, Jie‐Bin Lew, Wanqing Chen, Ju‐Fang Shi
International Journal of Cancer.2024;[Epub] CrossRef
Analysis of the current situation and related influencing factors of cervical precancer screening under the COVID-19
Xiaohong Song, Yongbin Yang
Biotechnology and Genetic Engineering Reviews.2023; : 1. CrossRef
Willingness to Undergo Gastroscopy for Early Gastric Cancer Screening and Its Associated Factors During the COVID-19 Pandemic – A Nationwide Cross-Sectional Study in China
Kejia Ma, Xuejie Chen, Xin Xiang, Xueyi Mao, Ningxin Zhu, Tianyu Wang, Shuyu Ye, Xiaoyan Wang, Minzi Deng
Patient Preference and Adherence.2023; Volume 17: 505. CrossRef
Impact of coronavirus disease 2019 pandemic on breast cancer surgery using the National Database of Japan
Misuzu Fujita, Hideyuki Hashimoto, Kengo Nagashima, Kiminori Suzuki, Tokuzo Kasai, Kazuya Yamaguchi, Yoshihiro Onouchi, Daisuke Sato, Takehiko Fujisawa, Akira Hata
Scientific Reports.2023;[Epub] CrossRef
The impact of COVID-19 pandemic on diagnosis and management of gastrointestinal cancers
Byung Soo Yoo, Ankit Patel, Kevin V. Houston, Alejandra Vargas, Ana Rosa Vilela Sangay, Steve M. D’Souza, David A. Johnson
Exploration of Medicine.2023; : 356. CrossRef
Changes in the Utilization of Health Care Services by Cancer Patients during the COVID-19 Pandemic
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Yonsei Medical Journal.2023; 64(7): 463. CrossRef
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Catalin Vladut Ionut Feier, Alaviana Monique Faur, Calin Muntean, Andiana Blidari, Oana Elena Contes, Diana Raluca Streinu, Sorin Olariu
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Impact of Coronavirus Disease 2019 on Gastric Cancer Diagnosis and Stage: A Single-Institute Study in South Korea
Moonki Hong, Mingee Choi, JiHyun Lee, Kyoo Hyun Kim, Hyunwook Kim, Choong-Kun Lee, Hyo Song Kim, Sun Young Rha, Gyu Young Pih, Yoon Jin Choi, Da Hyun Jung, Jun Chul Park, Sung Kwan Shin, Sang Kil Lee, Yong Chan Lee, Minah Cho, Yoo Min Kim, Hyoung-Il Kim,
Journal of Gastric Cancer.2023; 23(4): 574. CrossRef
Socioeconomic inequality in organized and opportunistic screening for gastric cancer: results from the Korean National Cancer Screening Survey 2009–2022
Xuan Quy Luu, Kyeongmin Lee, Jae Kwan Jun, Mina Suh, Kui Son Choi
Frontiers in Public Health.2023;[Epub] CrossRef
Impact of the COVID-19 Pandemic on Gastric Cancer Screening in South Korea: Results From the Korean National Cancer Screening Survey (2017–2021)
Kyeongmin Lee, Mina Suh, Jae Kwan Jun, Kui Son Choi
Journal of Gastric Cancer.2022; 22(4): 297. CrossRef
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Trends in breast cancer screening rates among Korean women: results from the Korean National Cancer Screening Survey, 2005-2020
Soo Yeon Song, Yun Yeong Lee, Hye Young Shin, Bomi Park, Mina Suh, Kui Son Choi, Jae Kwan Jun
Epidemiology and Health.2022; 44: e2022111. CrossRef

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 Summary PDF Supplementary Material

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.

Citations

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Mining Google Trends data for nowcasting and forecasting colorectal cancer (CRC) prevalence
Cristiana Tudor, Robert Aurelian Sova
PeerJ Computer Science.2023; 9: e1518. CrossRef

The classification capability of the Asia Pacific Colorectal Screening score in Korea: an analysis of the Cancer Screenee Cohort: Xuan Quy Luu, Kyeongmin Lee, Jeongseon Kim, Dae Kyung Sohn, Aesun Shin, Kui Son Choi; Epidemiol Health. 2021;43:e2021069. Published online September 16, 2021; DOI: https://doi.org/10.4178/epih.e2021069

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
This study aimed to validate a simple risk assessment tool for estimating the advanced colorectal neoplasia (ACN) risk at colonoscopy screenings and potential factors relevant for implementing this tool in the Korean population.

METHODS

Our study analyzed data from the Cancer Screenee Cohort Study conducted by the National Cancer Center in Korea. The risk level was assessed using the Asia Pacific Colorectal Screening (APCS) score developed by the Asia-Pacific Working Group on Colorectal Cancer. Logistic regression models were used to examine the associations between colorectal-related outcomes and the risk level by APCS score. The discriminatory performance of the APCS score for various colorectal-related outcomes was assessed using C-statistics.

RESULTS

In 12,520 individuals, 317 ACN cases and 4,528 adenoma cases were found. The APCS tool successfully classified the study population into different risk groups, and significant differences in the ACN rate and other outcomes were observed. The APCS score demonstrated acceptable discrimination capability with area under the curve values ranging from 0.62 to 0.65 for various outcomes. The results of the multivariate logistic regression model revealed that the high-risk group had a 3.1-fold higher risk of ACN (95% confidence interval, 2.08 to 4.67) than the average-risk group. Body mass index (BMI) was identified as a significant predictor of ACN in both multivariate and subgroup analyses.

CONCLUSIONS

Our study highlighted significant differences in colorectal-related screening outcomes by colorectal risk level measured using the APCS score, and BMI could be used to improve the discriminatory capability of the APCS score.

Summary

Korean summary
검진의 위해성을 줄이면서 동시에 이득을 최대화할 수 있는 최적의 검진 프로그램은 암 발생 위험도를 고려하는 것이다. 이 연구는 Asia-Pacific Working Group on Colorectal Cancer에서 제안한 “Asia Pacific Colorectal Screening Score (APCS)”가 한국인에서 대장암 발생 위험도를 선별적으로 잘 구분해 낼 수 있음을 보여주었다. 나아가 대장암의 위험도 점수를 산출하는데 체질량지수가 중요한 예측 변수라는 것을 확인하였고, 한국인에서 대장암 발생 위험도의 변별력을 향상시키기 위해 기존의 APCS에 체질량지수를 추가할 것을 제안하였다.

Key Message
This study highlighted that the Asia Pacific Colorectal Screening Score by the Asia-Pacific Working Group on Colorectal Cancer could successfully classify Korean screenees into different risk groups with acceptable discriminatory capability. Furthermore, our study results also suggest that BMI is a significant predictor of colorectal-related health outcomes, which could be potentially added to the original APCS score for improving its discriminatory power.

Citations

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Performance of the Asia–Pacific Colorectal Screening score in stratifying the risk of advanced colorectal neoplasia: A meta‐analysis and systematic review
Mai Ngoc Luu, Nhi Ai Trinh, Truc Le Thanh Tran, Thinh Phuong Dang, Toru Hiyama, Duc Trong Quach
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Distribution of dense breasts using screening mammography in Korean women: a retrospective observational study: Jong-Myon Bae, Sang Yop Shin, Eun Hee Kim, Yoon-Nam Kim, Chung Mo Nam; Epidemiol Health. 2014;36:e2014027. Published online November 4, 2014; DOI: https://doi.org/10.4178/epih/e2014027

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Abstract

OBJECTIVES
This retrospective observational study evaluated the distribution of dense breasts by age group among healthy Korean women.

METHODS

Participants were women aged 30 years and older who voluntarily underwent screening mammography between January 2007 and December 2011. Women who received the Breast Imaging Reporting and Data System for mammographic density of 3 or 4 were defined as having dense breasts. The proportion of women with dense breasts (PDB, %) was calculated by dividing the number of participants with dense breasts by the total number of participants.

RESULTS

Among the 231,058 women who participated, 78.15% were classified as having dense breasts. PDB was highest in the youngest age group (PDB=94.87%) and lowest in the oldest age group. The greatest difference in PDB between adjacent age groups was observed in the group aged 60-64 years.

CONCLUSIONS

The results show that the proportion of dense breasts by age group increased in all age groups, except in those aged 35-39 years. These findings suggest an association between the age distribution of dense breasts and trends in breast cancer incidence. Further studies are needed to estimate the change in breast cancer incidence rate by age and the accumulation of fatty breast tissue in Korean women.

Summary

Citations

Citations to this article as recorded by

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Review

Methodological Review of Cost Effectiveness Analysis of Cancer Screening.: Ki Taig Jung; Korean J Epidemiol. 1998;20(1):13-31.

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Abstract PDF: Abstract
The role of economic evaluation for medical services can be summarixed as providing objective criteria for rational bgudget allocation. With medical and epidemiologial studies, cost effectiveness analysis of cancer screening will provide evidence for allocating more financial resources for cancer screening. This study reviewed comprehensive literature of cancer screening for cervical cancer and breast cancer. Through the extensive review of the literature, I suggest crucial issues of cancer screening and checkpoints in designing costeffectiveness analyses of cervical and breast cancers. The issues of cervical and breast cancer screening include ages of starting and terminating mass screening, screening interval and frequency, false positive rate, false negative rate, analytical models, and sensitivity analysis. In addition, cost effectiveness analysis of breast cancer should consider effects of screening methods-self examination, clinical examination, and mammography-that varies across different nations on cost effectiveness ratio. Study results of most issues would be relevant for performing cost effectiveness analysis of cancer screening in Korea. However, difference in incidence rate, medical fees and reimbursement by insurance across nations should be considered in designing cost effectiveness analysis.; Summary

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