Epidemiology and Health

Jae-Hong Ryoo

5 Articles

Association of decreased estimated glomerular filtration rate with lung cancer risk in the Korean population: Soonsu Shin, Min-Ho Kim, Chang-Mo Oh, Hyejin Chun, Eunhee Ha, Hyo Choon Lee, Seong Ho Moon, Dong-Young Lee, Dosang Cho, Sangho Lee, Min Hyung Jung, Jae-Hong Ryoo; Epidemiol Health. 2024;e2024041. Published online March 20, 2024; DOI: https://doi.org/10.4178/epih.e2024041 [Accepted]

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Abstract PDF: Abstract
OBJECTIVES
Inconsistent results are available regarding the association between low estimated glomerular filtration rate (eGFR) and lung cancer risk. We aimed to explore the risk of lung cancer according to eGFR category in the Korean population.
METHODS
We included 358,293 adults who underwent health checkups between 2009 and 2010, utilizing data from the National Health Insurance Service-National Sample Cohort. Participants were categorized into 3 groups based on their baseline eGFR, as determined using the Chronic Kidney Disease Epidemiology Collaboration equation: group 1 (eGFR ≥90 mL/min/1.73m2), group 2 (eGFR ≥60 to <90mL/min/1.73m2), and group 3 (eGFR <60 mL/min/1.73m2). Incidences of lung cancer were identified using the corresponding codes from the International Classification of Diseases, 10th Revision. Multivariate Cox proportional hazard models were employed to calculate the adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) for lung cancer incidence up to 2019.
RESULTS
In multivariate analysis, group 2 exhibited a 26.5% higher risk of developing lung cancer than group 1 (HR, 1.265; 95% CI, 1.189 to 1.346). Furthermore, group 3 demonstrated a 72.5% elevated risk of lung cancer relative to group 1 (HR, 1.725; 95% CI, 1.577 to 1.887). Among participants with dipstick proteinuria of 2+ or greater, group 3 faced a significantly higher risk of lung cancer than group 1 (HR, 2.928; 95% CI, 1.375 to 6.237).
CONCLUSION
Low eGFR was significantly associated with increased lung cancer risk within the Korean population. A particularly robust association was observed in individuals with severe proteinuria, emphasizing the need for further investigation.; Summary

Changes in proteinuria and the associated risks of ischemic heart disease, acute myocardial infarction, and angina pectoris in Korean population: Sung Keun Park, Ju Young Jung, Min-Ho Kim, Chang-Mo Oh, Eunhee Ha, Eun Hye Yang, Hyo Choon Lee, Soonsu Shin, Woo Yeon Hwang, Sangho Lee, So Youn Shin, Jae-Hong Ryoo; Epidemiol Health. 2023;45:e2023088. Published online September 30, 2023; DOI: https://doi.org/10.4178/epih.e2023088

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Abstract Summary PDF Supplementary Material: Abstract
OBJECTIVES
Proteinuria is widely used to predict cardiovascular risk. However, there is insufficient evidence to predict how changes in proteinuria may affect the incidence of cardiovascular disease.
METHODS
The study included 265,236 Korean adults who underwent health checkups in 2003-2004 and 2007-2008. They were categorized into 4 groups based on changes in proteinuria (negative: negative → negative; resolved: proteinuria ≥1+ → negative; incident: negative → proteinuria ≥1+; persistent: proteinuria ≥1+ → proteinuria ≥1+). We conducted 6 years of follow-up to identify the risks of developing ischemic heart disease (IHD), acute myocardial infarction (AMI), and angina pectoris according to changes in proteinuria. A multivariate Cox proportional-hazards model was used to calculate adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) for incident IHD, AMI, and angina pectoris.
RESULTS
The IHD risk (expressed as HR [95% CI]) was the highest for persistent proteinuria, followed in descending order by incident and resolved proteinuria, compared with negative proteinuria (negative: reference, resolved: 1.211 [95% CI, 1.104 to 1.329], incident: 1.288 [95% CI, 1.184 to 1.400], and persistent: 1.578 [95% CI, 1.324 to 1.881]). The same pattern was associated with AMI (negative: reference, resolved: 1.401 [95% CI, 1.048 to 1.872], incident: 1.606 [95% CI, 1.268 to 2.035], and persistent: 2.069 [95% CI, 1.281 to 3.342]) and angina pectoris (negative: reference, resolved: 1.184 [95% CI, 1.065 to 1.316], incident: 1.275 [95% CI, 1.160 to 1.401], and persistent: 1.554 [95% CI, 1.272 to 1.899]).
CONCLUSIONS
Experiencing proteinuria increased the risks of IHD, AMI, and angina pectoris even after proteinuria resolved.; Summary

Korean summary
- 본 연구의 목적은 요 시험지 검사를 통해 확인된 단백뇨의 3-5년간의 변화 수준에 따른 허혈성 심질환, 급성 심근 경색, 협심증의 발생 위험을 평가하는 것이다. - 지속적으로 단백뇨가 음성인 집단에 (negative proteinuria) 비해서, 단백뇨가 있었다 사라진 집단 (resolved proteinuria), 새로이 단백뇨가 생긴 집단 (incident proteinuria), 지속적으로 단백뇨가 존재하는 집단 (persistent proteinuria)은 유의하게 증가한 허혈성 심질환, 급성 심근 경색, 협심증의 발생 위험을 나타내었다. - 이러한 결과는 단백뇨가 일단 발생한 사람은, 나중에 사라지더라도, 관상 동맥 질환에 대한 위험이 높으며, 이에 대한 관리와 주의가 필요하다는 것을 시사한다.

Key Message
- The present study was to evaluate the risk of incident ischemic heart disease, acute myocardial infarction, and angina pectoris according to changes in urine dipstick proteinuria over 3-5 years. - Compared with persistently negative proteinuria (negative → negative), resolved proteinuria (positive → negative), incident proteinuria (negative → positive), and persistent proteinuria (positive → positive) had the increased risk of ischemic heart disease, acute myocardial infarction, and angina pectoris. - These results suggest that once manifested proteinuria lead to the increased risk of coronary artery disease, regardless of changes in proteinuria.

The association of pancreatic cancer incidence with smoking status and smoking amount in Korean men: Do Jin Nam, Chang-Mo Oh, Eunhee Ha, Min-Ho Kim, Eun Hye Yang, Hyo Choon Lee, Soon Su Shin, Woo Yeon Hwang, Ann Hee You, Jae-Hong Ryoo; Epidemiol Health. 2022;44:e2022040. Published online April 21, 2022; DOI: https://doi.org/10.4178/epih.e2022040

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
Our study examined the dose-response relationship between smoking amounts (pack-years) and the risk of developing pancreatic cancer in Korean men.

METHODS

Of 125,743 participants who underwent medical health checkups in 2009, 121,408 were included in the final analysis and observed for the development of pancreatic cancer. We evaluated the associations between smoking amounts and incident pancreatic cancer in 4 groups classified by pack-year amounts. Cox proportional hazards models were used to estimate the adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) of incident pancreatic cancer by comparing groups 2 (<20 pack-year smokers), 3 (20-≤40 pack-year smokers), and 4 (>40 pack-year smokers) with group 1 (never smokers).

RESULTS

During 527,974.5 person-years of follow-up, 245 incident cases of pancreatic cancer developed between 2009 and 2013. The multivariate-adjusted HRs (95% CIs) for incident pancreatic cancer in groups 2, 3, and 4 were 1.05 (0.76 to 1.45), 1.28 (0.91 to 1.80), and 1.57 (1.00 to 2.46), respectively (p for trend=0.025). The HR (95% CI) of former smokers showed a dose-response relationship in the unadjusted model, but did not show a statistically significant association in the multivariate-adjusted model. The HR (95% CI) of current smokers showed a dose-response relationship in both the unadjusted (p for trend=0.020) and multivariate-adjusted models (p for trend=0.050).

CONCLUSIONS

The risk of developing pancreatic cancer was higher in current smokers status than in former smokers among Korean men, indicating that smoking cessation may have a protective effect.

Summary

Korean summary
본 연구에서는 대한민국 남성을 대상으로 흡연양 및 흡연상태에 따른 췌장암 발병을 분석하였다. 흡연양이 많을수록, 현재 흡연상태일수록 췌장암 발병이 높았고, 금연한 경우 췌장암의 발병이 낮은 것을 확인할 수 있었다.

Key Message
As a result of analyzing the incidence of pancreatic cancer according to the amount of smoking and smoking status among Korean men, it was confirmed that the more smoked and the current smoking status, the higher the incidence of pancreatic cancer, and the lower the incidence of pancreatic cancer when quitting smoking.

Citations

Citations to this article as recorded by

Associations between smoking status and infertility: a cross-sectional analysis among USA women aged 18-45 years
Sijie He, Li Wan
Frontiers in Endocrinology.2023;[Epub] CrossRef
Modifiable Pancreatic Ductal Adenocarcinoma (PDAC) Risk Factors
Natalia Michalak, Ewa Małecka-Wojciesko
Journal of Clinical Medicine.2023; 12(13): 4318. CrossRef
Childhood and adulthood passive and active smoking, and the ABO group as risk factors for pancreatic cancer in women
Anne‐Laure Vedie, Nasser Laouali, Amandine Gelot, Gianluca Severi, Marie‐Christine Boutron‐Ruault, Vinciane Rebours
United European Gastroenterology Journal.2023;[Epub] CrossRef

The influence of the dietary intake of vitamin C and vitamin E on the risk of gastric intestinal metaplasia in a cohort of Koreans: Sung Keun Park, Yeongu Chung, Chang-Mo Oh, Jae-Hong Ryoo, Ju Young Jung; Epidemiol Health. 2022;44:e2022062. Published online July 29, 2022; DOI: https://doi.org/10.4178/epih.e2022062

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
Studies have suggested that the dietary intake of antioxidant vitamins, such as vitamin C and vitamin E, has a potential role in inhibiting gastric carcinogenesis. The present study investigated the effect of antioxidant vitamins on the incidence of gastric intestinal metaplasia (GIM).

METHODS

This study included 67,657 Koreans free of GIM who periodically underwent health check-ups. Dietary intake was assessed by a semiquantitative food frequency questionnaire based on the Korean National Health and Nutrition Examination Survey. Participants were categorized into 4 groups by quartiles of dietary vitamin C and vitamin E intake. The Cox proportional hazard assumption was used to determine the multivariable hazard ratio (HR) and 95% confidence interval (95% CI) for GIM.

RESULTS

The third and fourth quartiles of vitamin C intake had a lower risk of GIM than the first quartile (multivariable-adjusted HR, 0.95; 95% CI, 0.88 to 1.03 in the second quartile, HR, 0.88; 95% CI, 0.81 to 0.97 in the third quartile, and HR, 0.85; 95% CI, 0.76 to 0.95 in the fourth quartile). Vitamin E intake greater than the second quartile level was significantly associated with a lower risk of GIM than the first quartile (multivariable-adjusted HR, 0.90; 95% CI, 0.82 to 0.97 in the second quartile, HR, 0.90; 95% CI, 0.82 to 0.99 in the third quartile, and HR, 0.83; 95% CI, 0.74 to 0.94 in the fourth quartile). This association was observed only in the subgroup analysis for men.

CONCLUSIONS

Higher dietary intake of vitamin C and vitamin E was associated with a lower risk of GIM.

Summary

Korean summary
본 연구에서는 6만명 이상의 한국인을 대상으로 비타민 C와 비타민 E의 섭취량과 장기적인 위 장상피화생 (GIM) 발생 위험도의 상관 관계를 연구했다. 우리는 비타민 C와 E 섭취량이 많은 근로 연령대의 한국인에서 낮은 위 장상피화생 발생 위험을 확인했다. 이 연관성은 여성보다 남성에서 더 분명하게 나타났다.

Key Message
1. This study investigated the long-term effect of vitamin C and vitamin E intake on the longitudinal risk of GIM in more than 60,000 Koreans 2. We found increased intake of Vitamin C/E is associated with lower incidental risk of GIM in working aged Korean. 3. This association was more prominent in men than women.

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Dietary Intake of Antioxidant Vitamins and Its Relation to the Progression of Chronic Kidney Disease in Adults With Preserved Renal Function
Sung Keun Park, Chang-Mo Oh, Eugene Kim, Ju Young Jung
Journal of Renal Nutrition.2024;[Epub] CrossRef
Longitudinal analysis for the risk of depression according to the consumption of sugar-sweetened carbonated beverage in non-diabetic and diabetic population
Sung Keun Park, Yeongu Chung, Yoosoo Chang, Chang-Mo Oh, Jae-Hong Ryoo, Ju Young Jung
Scientific Reports.2023;[Epub] CrossRef

The risk of gastric cancer according to changes in smoking status among Korean men: Sung Keun Park, Min-Ho Kim, Chang-Mo Oh, Eunhee Ha, Eun Hye Yang, Woo Yeon Hwang, Ann Hee You, Jae-Hong Ryoo; Epidemiol Health. 2022;44:e2022086. Published online October 7, 2022; DOI: https://doi.org/10.4178/epih.e2022086

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Abstract Summary PDF

Abstract

OBJECTIVES
Smoking is a risk factor for gastric cancer. Studies have shown that the risk of gastric cancer can vary by smoking status and smoking amount at a single point in time. However, few data have been reported about the effect of changes in smoking status over time on the risk of gastric cancer.

METHODS

This study collected data from the National Health Insurance Corporation in Korea on 97,700 Korean men without gastric cancer who underwent health check-ups from 2002 to 2013. The smoking status (never smoked, quit smoking, and currently smoking) of study participants was assessed in 2003-2004 and 2009, and the results were categorized into 7 groups: never-never, never-quit, never-current, quit-quit, quit-current, current-quit, and current-current. Participants were followed until 2013 to identify incident gastric cancer. A multivariate Cox proportional hazard model was used to calculate adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) for incident gastric cancer according to changes in smoking status and smoking amount (pack-years).

RESULTS

Compared with group 1 (never-never), participants currently smoking in 2009 (never-current, quit-current, and current-current) had higher HRs for gastric cancer (never-quit: 1.077; 95% CI, 0.887 to 1.306, never-current: 1.347; 95% CI, 0.983 to1.846, quit-quit: 1.086; 95% CI, 0.863 to 1.366, quit-current: 1.538; 95% CI, 1.042 to 2.269, current-quit: 1.339; 95% CI, 1.077 to 1.666, and current-current: 1.589; 95% CI, 1.355 to 1.864, respectively). The risk for gastric cancer was highest in heavy smokers, followed by moderate smokers.

CONCLUSIONS

In all categories of smoking status, current smoking was associated with the highest risk of gastric cancer. Heavy smoking was associated with an increased risk of gastric cancer, even in former smokers.

Summary

Korean summary
현재 흡연자의 경우 과거 흡연여부와 관계 없이 위암의 위험성이 가장 증가한다. 과거 흡연자의 경우에는 흡연량이 많은 경우에는 위암의 위험성이 증가한다. 이런 결과는 금연이나 흡연량을 줄이는 것이 위암의 위험성을 감소시키는데 매우 중요한 요인이란 것을 확인할 수 있다.

Key Message
Current smoking was associated with an increased risk of gastric cancer, regardless of previous smoking status. Although former smoking was not associated with an increased risk of gastric cancer, former smokers with a history of heavy smoking had an increased risk of gastric cancer. These results suggest that smoking cessation and reducing smoking amounts are both important factors in reducing the risk of gastric cancer.

Citations

Citations to this article as recorded by

Gastric dysplasia in random biopsies: the influence of Helicobacter pylori infection and alcohol consumption in the presence of a lesion
Ana Isabel Ferreira, Tiago Lima Capela, Vítor Macedo Silva, Sofia Xavier, Pedro Boal Carvalho, Joana Magalhães, José Cotter
Scandinavian Journal of Gastroenterology.2024; 59(2): 125. CrossRef

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