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Hyunseok Kang 3 Articles
Effect of chemotherapy and radiotherapy on cognitive impairment in colorectal cancer: evidence from Korean National Health Insurance Database Cohort
Kwanghyun Kim, Chang Woo Kim, Aesun Shin, Hyunseok Kang, Sun Jae Jung
Epidemiol Health. 2021;43:e2021093.   Published online November 2, 2021
DOI: https://doi.org/10.4178/epih.e2021093
  • 4,098 View
  • 127 Download
  • 2 Citations
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
OBJECTIVES
We investigated the risk of chemotherapy-related and radiotherapy-related cognitive impairment in colorectal cancer patients.
METHODS
Medical use data of colorectal cancer patients were obtained from the Korean National Health Insurance Database from 2004 to 2018. We randomly selected 40% of all colorectal cancer patients (n=148,848). Cognitive impairment was defined as having 1 or more International Classification of Diseases, 10th revision diagnostic codes for dementia or mild cognitive impairment. Patients aged 18 years or younger, patients diagnosed with cognitive impairment before colorectal cancer diagnosis (n=8,225), and patients who did not receive primary resection (n=45,320) were excluded. The effects of individual chemotherapy regimens on cognitive impairment were estimated. We additionally estimated the effect of radiotherapy in rectal cancer patients. Time-dependent competing risk Cox regression was conducted to estimate the overall and age-specific hazard ratios (HR) separately for colon and rectal cancer. Landmark analyses with different lag times were conducted as sensitivity analyses.
RESULTS
Chemotherapy did not increase the risk of cognitive impairment in colorectal cancer patients (colon cancer: HR, 0.92; 95% confidence interval [CI], 0.83 to 1.03; rectal cancer: HR, 0.88; 95% CI, 0.75 to 1.04), while radiotherapy was negatively associated with cognitive impairment in rectal cancer patients (HR, 0.01; 95% CI, 0.84 to 0.99). Varying directions of the associations between regimens and cognitive impairment were detected. The adverse effect of certain chemotherapy regimens on cognition was more prominent in older adults.
CONCLUSIONS
Chemotherapy and radiotherapy did not increase the risk of cognitive impairment. Older patients with low cognitive reserve could be affected by the adverse cognitive effects of chemotherapy.
Summary
Korean summary
- 대장암 환자를 대상으로 한 항암화학요법 및 방사선요법은 인지기능저하의 위험을 높이지 않았다 - 일부 항암화학요법의 경우 고령의 대장암 환자에서 인지기능저하의 위험을 증가시킬 수 있다
Key Message
Results from nationwide cohort of Korea showed that chemotherapy and radiotherapy did not increase the risk of cognitive impairment in colorectal cancer patients.

Citations

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  • Chemotherapy-induced functional brain abnormality in colorectal cancer patients: a resting‐state functional magnetic resonance imaging study
    Siwen Liu, Yesong Guo, Jie Ni, Na Yin, Chenchen Li, Xuan Pan, Rong Ma, Jianzhong Wu, Shengwei Li, Xiaoyou Li
    Frontiers in Oncology.2022;[Epub]     CrossRef
  • Association between multimorbidity status and incident dementia: a prospective cohort study of 245,483 participants
    He-Ying Hu, Ya-Ru Zhang, Qiaolifan Aerqin, Ya-Nan Ou, Zuo-Teng Wang, Wei Cheng, Jian-Feng Feng, Lan Tan, Jin-Tai Yu
    Translational Psychiatry.2022;[Epub]     CrossRef
Androgen deprivation therapy is associated with decreased second primary lung cancer risk in the United States veterans with prostate cancer
Kyungsuk Jung, Jong Chul Park, Hyunseok Kang, Johann Christoph Brandes
Epidemiol Health. 2018;40:e2018040.   Published online August 11, 2018
DOI: https://doi.org/10.4178/epih.e2018040
  • 8,881 View
  • 196 Download
  • 3 Citations
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
OBJECTIVES
We investigated whether androgen deprivation therapy (ADT) in prostate cancer patients was associated with a decreased risk for second primary lung cancer in US veterans.
METHODS
Prostate cancer diagnoses in the US Veterans Affairs Cancer Registry between 1999 and 2008 were identified. Use of hormonal therapy and diagnoses of second primary lung cancer were determined from the registry. Synchronous prostate and lung cancers, defined as 2 diagnoses made within 1 year, were excluded from the analysis. Cancer-free survival was estimated using the Kaplan-Meier method and hazard ratios were estimated using Cox proportional hazard models.
RESULTS
Among the 63,141 identified patients with prostate cancer, 18,707 subjects were eligible for the study. Hormonal therapy was used in 38% of patients and the median follow-up period was 28 months. ADT use was associated with longer lung cancer-free survival in prostate cancer patients (log-rank p=0.01). After adjusting for age, race, smoking and prostate cancer stage, ADT use was associated with decreased lung cancer risk by 15, 21, and 24% after 1, 2, and 3 years, respectively.
CONCLUSIONS
ADT in prostate cancer patients may be associated with decreased second primary lung cancer risk among US veterans.
Summary
Korean summary
비소세포성 폐암이 호르몬 수용체에 의해 영향을 받을 수 있다는 기존의 연구 결과를 바탕으로, 이 연구는 미국 재향 군인 병원 암등록 자료를 분석하여 전립선암 환자 중, 안드로겐 박탈 요법으로 치료를 받은 경우와 그렇지 않은 경우의 비소세포성 폐암 발생율을 비교분석하였다. 분석 결과, 전립선암을 진단받은 미국 재향군인들 중 안드로겐 박탈 요법으로 치료를 받은 환자들이 그렇지 않은 환자들에 비해 비소세포성 폐암 발생율이 통계적으로 유의미하게 감소하는 것이 관찰되었다.
Key Message

Citations

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  • Endogenous sex hormones, aromatase activity and lung cancer risk in postmenopausal never‐smoking women
    Yingya Zhao, Yu‐Tang Gao, Xianglan Zhang, Alan L. Rockwood, Mark M. Kushnir, Qiuyin Cai, Jie Wu, Jiajun Shi, Qing Lan, Nathaniel Rothman, Yu Shyr, Xiao‐Ou Shu, Wei Zheng, Gong Yang
    International Journal of Cancer.2022; 151(5): 699.     CrossRef
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    Diana R. Withrow, Sara J. Schonfeld, Rochelle E. Curtis, Lindsay M. Morton, Michael B. Cook, Eboneé N. Butler, Amy Berrington de González
    Cancer Causes & Control.2020; 31(11): 1011.     CrossRef
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    Teeranut Asavasupreechar, Monica S.M. Chan, Ryoko Saito, Yasuhiro Miki, Viroj Boonyaratanakornkit, Hironobu Sasano
    The Journal of Steroid Biochemistry and Molecular Biology.2019; 193: 105440.     CrossRef
Green Tea Consumption and Stomach Cancer Risk: A Meta-Analysis
Hyunseok Kang, Sun Young Rha, Kyung Won Oh, Chung Mo Nam
Epidemiol Health. 2010;32:e2010001.   Published online April 26, 2010
DOI: https://doi.org/10.4178/epih/e2010001
  • 14,428 View
  • 119 Download
  • 26 Citations
AbstractAbstract PDF
Abstract
OBJECTIVES

Green tea has been suggested to have a chemopreventive effect against various cancers including stomach cancer. The aim of this study is to elucidate the relationship between green tea consumption and stomach cancer risk by meta-analysis.

METHODS

Eighteen observational studies were identified using MEDLINE, THE COCHRANE LIBRARY, RISS, and a manual search. Summary relative risks/odds ratios (RR/ORs) for the highest versus non/lowest green tea consumption levels were calculated on the basis of fixed and random effect models. Subgroup analyses were used to examine heterogeneity across the studies.

RESULTS

The combined results indicate a reduced risk of stomach cancer with intake of green tea (RR/OR=0.86, 95% CI=0.74-1.00). Subgroup analysis with six studies that reported differences between the highest and lowest consumption levels equal to or greater than five cups/day revealed a statistically significant protective effect (RR/OR=0.68, 95% CI=0.53-0.87).

CONCLUSION

Green tea appears to play a protective role against the development of stomach cancer. The results also suggest that a higher level of green tea consumption might be needed for a clear preventive effect to appear. This conclusion, however, should be interpreted with caution because various biases can affect the results of a meta-analysis.

Summary
Korean summary
Key Message

Citations

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Epidemiol Health : Epidemiology and Health