Epidemiology and Health

Original article

Impact of body mass index and waist-to-hip ratio on mortality in middle-aged Koreans: A prospective cohort study based on a Health Examinees study: Sooyoung Cho, Aesun Shin, Ji-Yeob Choi, Jong-Koo Lee, Daehee Kang; Epidemiol Health. 2024;e2024073. Published online September 2, 2024; DOI: https://doi.org/10.4178/epih.e2024073 [Accepted]

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Abstract Summary PDF: Abstract
OBJECTIVES
We aimed to assess the impact of obesity on mortality in middle-aged Koreans using data from a Health Examinees study.
METHODS
We used data from the participants who had complete information on body size and gave informed consent for the linkage of their data with the national death certificate data. Cox proportional hazard model was used to estimate the hazard ratios (HRs) and 95% confidence intervals (CIs) of body mass index (BMI) and waist-to-hip ratio (WHR) for all-cause, cardiovascular, and cancer mortality.
RESULTS
A total of 115,961 participants were included in the study. The results showed a U-shaped association between BMI and mortality, indicating that both men and women with BMIs of less than 21 kg/m2 and greater than or equal to 30 kg/m2 are at increased risk. The results showed that men with a BMI of less than 18.5 kg/m² had a significantly higher risk of all-cause mortality (adjusted HR: 2.24 [95% CI: 1.73–2.91]) and cardiovascular mortality (2.27 [1.23–4.20]). Similarly, men with a WHR of less than 0.80 (1.38 [1.08–1.77]), 0.90 to less than 0.95 (1.15 [1.02–1.29]), and greater than or equal to 0.95 (1.28 [1.11–1.47]) showed an increased risk of all-cause mortality. In women, a BMI of less than 18 kg/m² was linked to a higher risk of cardiovascular mortality (2.67 [1.13–6.33]).
CONCLUSIONS
Being underweight was associated with an increased risk of mortality in both sexes, and the lowest risk of death was found in men who were slightly overweight with a BMI of 23-25 kg/m2.; Summary

Korean summary
중년 한국인으로 구성된 코호트 연구에서 BMI와 WHR이 원인별 사망에 미치는 영향을 평가함. BMI와 WHR이 사망 원인별 사망률과 U자형 연관성을 보였고, 특히 심혈관 질환에서 이러한 경향을 관찰함.

Key Message
This study examined the association between BMI, WHR, and cause-specific mortality in middle-aged Koreans. Both BMI and WHR showed U-shaped associations with mortality, particularly for cardiovascular outcomes. These findings may indicate a need to carefully consider the optimal BMI cut-off values for Asians to better capture mortality risks.

Original Article

Adherence to the World Cancer Research Fund/American Institute for Cancer Research and Korean Cancer Prevention Guidelines and cancer risk: a prospective cohort study from the Health Examinees-Gem study: Jeeyoo Lee, Aesun Shin, Woo-Kyoung Shin, Ji-Yeob Choi, Daehee Kang, Jong-Koo Lee; Epidemiol Health. 2023;45:e2023070. Published online August 1, 2023; DOI: https://doi.org/10.4178/epih.e2023070

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1 Web of Science
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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
The purpose of this study was to explore the association between adherence to 2 cancer prevention recommendations and cancer risk.

METHODS

In total, 104,386 individuals aged 40-69 years old who were recruited between 2004 and 2013 in the Health Examinees-Gem study were included. Adherence scores were constructed based on 8 items from the World Cancer Research Fund/American Institute for Cancer Research (WCRF/AICR) cancer prevention recommendations, including body weight, physical activity, diet, alcohol consumption and breastfeeding, and on 6 items from the Korean cancer prevention guidelines (smoking status, eating vegetables and fruits, salty foods, alcohol intake, physical activity, and body weight). A Cox proportional hazards model was used to estimate the associations between adherence scores and the risk of total and 5 major cancers.

RESULTS

The multivariable hazard ratio (HR) for total cancer with the high adherence score versus the lowest score (4.25-7.00 vs. 0.00-3.25) for the WCRF/AICR guidelines was 0.91 (95% confidence interval [CI], 0.82 to 1.00) in men. A reduced breast cancer risk was observed among women with the highest score. Men within the highest category of the Korean cancer prevention guideline score (3.25-6.00) had an HR of 0.80 (95% CI, 0.73 to 0.88) for developing total cancer compared to men within the lowest score (0.00-2.50). The higher adherence group among men showed lower risks of developing stomach, colorectal, and lung cancers.

CONCLUSIONS

Adhering to guidelines for cancer prevention can help to reduce the risk of developing cancer in Korean men. The association might differ by cancer type and gender.

Summary

Korean summary
- 암예방 가이드라인 준수가 실제로 암 발생을 예방하는지에 대한 해외 연구들이 다수 있으나 한국을 포함한 아시아 국가에서 수행된 연구는 없다. - 국제암연구재단 암예방수칙과 한국 암예방수칙을 준수하는 한국인 남성에서 암 발생 감소가 관찰되었다. 이러한 관련성은 암종에 따라 다르게 나타났다.

Key Message
- The adherence to the World Cancer Research Fund/American Institute of Cancer Research (WCRF/AICR) guidelines on cancer prevention has been addressed in several studies in Western countries. -Among the Korean population, adherence to WCRF/AICR cancer prevention guidelines as well as the Korean cancer prevention guidelines helps prevent cancer in men. Association varies by gender and type of cancer.

Citations

Citations to this article as recorded by

Compliance with the WCRF/AICR Recommendations in Qualitative Adaptation and the Occurrence of Breast Cancer: A Case-Control Study
Beata Stasiewicz, Lidia Wadolowska, Maciej Biernacki, Malgorzata Anna Slowinska, Ewa Stachowska
Cancers.2024; 16(2): 468. CrossRef
Transforming public health and economic outcomes by reducing risky behaviors: the potential for South Korea
Joan E. Madia, Ji Yoon Baek, Aesun Shin
Discover Social Science and Health.2024;[Epub] CrossRef

Case Report

In-Flight Transmission of Novel Influenza A (H1N1): Joon Hyung Kim, Dong-Han Lee, Sang-Sook Shin, Chun Kang, Jin Seok Kim, Byung Yool Jun, Jong-Koo Lee; Epidemiol Health. 2010;32:e2010006. Published online May 31, 2010; DOI: https://doi.org/10.4178/epih/e2010006

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104 Download
16 Crossref

Abstract PDF

Abstract

<p>The Korea Centers for Disease Control and Prevention confirmed two patients, who had taken the same plane from Los Angeles to Seoul, with novel influenza A (H1N1). Through contact tracing, we concluded that the second patient was infected during the flight.</p>

Summary

Citations

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