Journal of Preventive Medicine and Public Health

Original Articles

Effect Modification of Kidney Function on the Non-linear Association Between Serum Calcium Levels and Cardiovascular Mortality in Korean Adults: Jung-Ho Yang, Sun-Seog Kweon, Young-Hoon Lee, Seong-Woo Choi, So-Yeon Ryu, Hae-Sung Nam, Hye-Yeon Kim, Min-Ho Shin; J Prev Med Public Health. 2023;56(3):282-290. Published online May 31, 2023; DOI: https://doi.org/10.3961/jpmph.23.068

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Abstract Summary PDF Supplementary Material: Objectives
This study aimed to evaluate the potential interaction between kidney function and the non-linear association between serum calcium levels and cardiovascular disease (CVD) mortality.
Methods
This study included 8927 participants enrolled in the Dong-gu Study. Albumin-corrected calcium levels were used and categorized into 6 percentile categories: <2.5th, 2.5-25.0th, 25.0-50.0th, 50.0-75.0th, 75.0-97.5th, and >97.5th. Restricted cubic spline analysis was used to examine the non-linear association between calcium levels and CVD mortality. Cox proportional hazard regression was used to estimate hazard ratios (HRs) for CVD mortality according to serum calcium categories. All survival analyses were stratified by the estimated glomerular filtration rate.
Results
Over a follow-up period of 11.9±2.8 years, 1757 participants died, of whom 219 died from CVD. A U-shaped association between serum calcium and CVD mortality was found, and the association was more evident in the low kidney function group. Compared to the 25.0-50.0th percentile group for serum calcium levels, both low and high serum calcium tended to be associated with CVD mortality (<2.5th: HR, 6.23; 95% confidence interval [CI], 1.16 to 33.56; >97.5th: HR, 2.56; 95% CI, 0.76 to 8.66) in the low kidney function group. In the normal kidney function group, a similar association was found between serum calcium levels and CVD mortality (<2.5th: HR, 1.37; 95% CI, 0.58 to 3.27; >97.5th: HR, 1.65; 95% CI, 0.70 to 3.93).
Conclusions
We found a non-linear association between serum calcium levels and CVD mortality, suggesting that calcium dyshomeostasis may contribute to CVD mortality, and kidney function may modify the association.; Summary

Korean summary
- 혈중 칼슘 농도와 심혈관 질환에 의한 사망은 U자형의 비선형 연관성을 보였다. - 혈중 칼슘 농도와 심혈관 질환에 의한 사망의 비선형 연관성은 신기능이 정상인 그룹보다 신기능이 낮은 그룹에서 더 유의하게 나타났다.

The Korea Cohort Consortium: The Future of Pooling Cohort Studies: Sangjun Lee, Kwang-Pil Ko, Jung Eun Lee, Inah Kim, Sun Ha Jee, Aesun Shin, Sun-Seog Kweon, Min-Ho Shin, Sangmin Park, Seungho Ryu, Sun Young Yang, Seung Ho Choi, Jeongseon Kim, Sang-Wook Yi, Daehee Kang, Keun-Young Yoo, Sue K. Park; J Prev Med Public Health. 2022;55(5):464-474. Published online September 12, 2022; DOI: https://doi.org/10.3961/jpmph.22.299

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Abstract Summary PDF Supplementary Material

Objectives
We introduced the cohort studies included in the Korea Cohort Consortium (KCC), focusing on large-scale cohort studies established in Korea with a prolonged follow-up period. Moreover, we also provided projections of the follow-up and estimates of the sample size that would be necessary for big-data analyses based on pooling established cohort studies, including population-based genomic studies.
Methods
We mainly focused on the characteristics of individual cohort studies from the KCC. We developed “PROFAN”, a Shiny application for projecting the follow-up period to achieve a certain number of cases when pooling established cohort studies. As examples, we projected the follow-up periods for 5000 cases of gastric cancer, 2500 cases of prostate and breast cancer, and 500 cases of non-Hodgkin lymphoma. The sample sizes for sequencing-based analyses based on a 1:1 case-control study were also calculated.
Results
The KCC consisted of 8 individual cohort studies, of which 3 were community-based and 5 were health screening-based cohorts. The population-based cohort studies were mainly organized by Korean government agencies and research institutes. The projected follow-up period was at least 10 years to achieve 5000 cases based on a cohort of 0.5 million participants. The mean of the minimum to maximum sample sizes for performing sequencing analyses was 5917-72 102.
Conclusions
We propose an approach to establish a large-scale consortium based on the standardization and harmonization of existing cohort studies to obtain adequate statistical power with a sufficient sample size to analyze high-risk groups or rare cancer subtypes.

Summary

Korean summary
한국 코호트 컨소시엄(KCC)은 “2015년 한국의 생활 습관 및 환경 요인에 따른 암 기여분율” 프로젝트의 3단계 과업으로써, 본 프로젝트에 참여한 기존의 구축된 개인 코호트 연구의 연구자들을 주도로 다수의 대규모 한국 코호트 연구를 기반으로 구성되었다. 따라서 본 연구는 KCC에 포함된 한국 코호트 연구를 소개하는 것을 목표로 하였다. 또한 여러 기 확립된 국제 컨소시엄을 기반으로 빅데이터 기반 코호트 풀링 연구의 중요성을 제시하였다.

Citations

Citations to this article as recorded by

The relationship between regional inequalities in the provision of emergency health services and other health services
Erkan Boğa
Medicine.2023; 102(45): e35930. CrossRef

Non-linear Relationship Between Body Mass Index and Lower Urinary Tract Symptoms in Korean Males: Chang Kyun Choi, Sun A Kim, Ji-An Jeong, Sun-Seog Kweon, Min-Ho Shin; J Prev Med Public Health. 2019;52(3):147-153. Published online March 29, 2019; DOI: https://doi.org/10.3961/jpmph.18.259

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Abstract Summary PDF

Objectives
The purpose of this study was to evaluate the association between body mass index (BMI) and severe lower urinary tract symptoms (LUTS) in Korean males.
Methods
This study was conducted on males aged ≥50 years who participated in the 2011 Korean Community Health Survey. LUTS severity was assessed using the Korean version of the International Prostate Symptom Score (IPSS) questionnaire, and was dichotomized as severe (IPSS >19) and non-severe (IPSS ≤19). BMI was divided into 6 categories: <18.5, 18.5-22.9, 23.0-24.9, 25.0-27.4, 27.5-29.9, and ≥30.0 kg/m2. To evaluate the relationship between BMI and LUTS, a survey-weighted multivariate Poisson regression analysis was performed to estimate prevalence rate ratios (PRRs). Age, smoking status, alcohol intake, physical activity, educational level, household income, and comorbidities were adjusted for in the multivariate model.
Results
A U-shaped relationship was detected between BMI and severe LUTS. Compared with a BMI of 23.0-24.9 kg/m2, the PRR for a BMI <18.5 kg/m2 was 1.65 (95% confidence interval [CI], 1.35 to 2.02), that for a BMI of 18.5-22.9 kg/m2 was 1.25 (95% CI, 1.09 to 1.44), that for a BMI of 25.0-27.4 kg/m2 was 1.20 (95% CI, 1.00 to 1.45), that for a BMI of 27.5-29.9 kg/m2 was 1.11 (95% CI, 0.83 to 1.47), and that for a BMI ≥30.0 kg/m2 was 1.85 (95% CI, 1.18 to 2.88).
Conclusions
This study showed that both high and low BMI were associated with severe LUTS.

Summary

Korean summary
이 연구는 2011 지역사회건강조사를 기반으로 하였다. 한국인 남성에서 체질량지수와 하부요로증상 간에는 U자형 관련성이 있었으며, 저체중과 비만 모두 높은 하부요로증상 유병률을 보였다. 따라서 전립선 질환의 건강서비스 제공에 있어서 비만 뿐만 아니라 저체중 또한 위험인자로 함께 고려할 필요가 있다.

Citations

Citations to this article as recorded by

Metabolic syndrome and male lower urinary tract symptoms
Gallus B. INEICHEN, Fiona C. BURKHARD
Panminerva Medica.2022;[Epub] CrossRef

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