Epidemiology and Health

Original Articles

Inequality in dental flossing behavior among Korean adults based on household income levels: Zi-Lan Wang, Eun-Jae Choi, Seung-Hee Ryu, Seon-Jip Kim, Hyun-Jae Cho; Epidemiol Health. 2024;46:e2024052. Published online May 24, 2024; DOI: https://doi.org/10.4178/epih.e2024052

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Abstract Summary PDF: Abstract
OBJECTIVES
The aim of this study was to estimate the association between household income and dental flossing.
METHODS
This cross-sectional study investigated the impact of household income on flossing among 9,391 adults aged 30+ with ≥20 natural teeth, utilizing data from the seventh Korea National Health and Nutrition Examination Survey (2016-2018). Outcome measures included flossing (yes/no), with income categorized into 4 levels: lowest, medium to low, medium to high, and highest. Logistic regression, adjusted for age, gender, brushing frequency, recent dental exams, periodontitis, smoking, and alcohol use, was employed to evaluate the influence of socioeconomic status on oral hygiene practices.
RESULTS
In the highest income group, flossing was 62.6% more prevalent than in the lowest income group (adjusted odds ratio [aOR], 1.63; 95% CI, 1.27 to 2.08). The strongest association between income levels and flossing was observed in individuals aged ≥70 years (aOR, 3.64; 95% CI, 1.86 to 7.11), with a decreasing strength of association in the 60s (aOR, 1.72; 95% CI, 1.05 to 2.84) and 50s age groups (aOR, 1.69; 95% CI, 1.07 to 2.68). Higher-income women demonstrated a higher frequency of flossing than their lower-income counterparts (aOR, 1.67; 95% CI, 1.24 to 2.23). Higher-income individuals without periodontitis were more likely to floss (aOR, 1.64; 95% CI, 1.23 to 2.18), and among those with periodontitis, flossing was significantly associated only with the highest income category (aOR, 1.64; 95% CI, 1.10 to 2.44).
CONCLUSIONS
The findings of this study indicate a significant correlation between higher household income levels and an increased prevalence of flossing.; Summary

Korean summary
이 연구는 치실 사용이 개인의 건강행동 습관뿐만 아니라 사회경제적 지위에 의해 크게 영향을 받는다는 점을 강조합니다. 높은 소득층이 치실을 더 자주 사용하는 경향이 있으며, 이는 교육 수준과 건강 문해력, 경제적 여유와 관련이 있습니다. 공중보건 계획에서 경제적 요인을 고려하고, 치과 위생 교육과 제품 접근성을 개선해야 합니다.

Key Message
This study highlights that the use of dental floss is significantly influenced not only by personal health behavior habits but also by socioeconomic status. Individuals in higher income classes tend to use dental floss more frequently, which is associated with higher levels of education, health literacy, and economic resources. Public health planning should take economic factors into account and focus on improving dental hygiene education and access to dental care products.

Effects of multigrain rice and white rice on periodontitis: an analysis using data from the Korea National Health and Nutrition Examination Survey 2012-2015: Seung-Hee Ryu, Zi-lan Wang, Seon-Jip Kim, Hyun-Jae Cho; Epidemiol Health. 2023;45:e2023063. Published online July 3, 2023; DOI: https://doi.org/10.4178/epih.e2023063

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2 Web of Science
2 Crossref

Abstract

OBJECTIVES
Numerous studies have investigated the efficacy of whole grains; however, research on multigrain remains limited. Grains exhibit combined positive effects against various diseases. The purpose of this study was to examine the impact of multigrain and white rice consumption on periodontitis.

METHODS

We analyzed data from the Korea National Health and Nutrition Examination Survey V-3 and VI, collected between 2012 and 2015, which included 12,450 patients (4,859 male and 7,591 female) aged 19-64 years. The World Health Organization’s Community Periodontal Index (CPI) was utilized to assess the presence of periodontitis, with periodontitis defined as a CPI index score of ≥3. Multivariable logistic regression analysis was performed after adjusting for potential confounding variables.

RESULTS

The group that consumed only multigrain rice was less likely to have periodontitis than the group that consumed only white rice (odds ratio [OR], 0.80; 95% confidence interval [CI], 0.69 to 0.93). When stratified by sex, the risk of periodontitis demonstrated a 24% decrease in female who consumed only multigrain rice (OR, 0.76; 95% CI, 0.62 to 0.93). A similar result was observed in the age group of 40-64 years (OR, 0.84; 95% CI, 0.71 to 0.99). In the diabetes stratification model, the normal group that consumed only multigrain rice exhibited a 25% decrease in the odds of periodontitis (OR, 0.75; 95% CI, 0.62 to 0.91).

CONCLUSIONS

Our findings suggest that the prevalence of periodontitis may vary depending on the type of rice consumed.

Summary

Korean summary
본 연구에서는 우리나라의 대규모 자료를 이용하여 쌀 섭취 종류가 치주염 위험에 미치는 영향을 살펴보았다. 우리의 연구 결과는 잡곡밥을 매일 2회 이상 섭취하는 것이 흰쌀밥을 먹는 것보다 치주염 예방에 더 효과적이라는 것을 보여준다. 이러한 결과는 당뇨병이 있는 사람에 비해 건강한 사람, 남성보다는 여성, 40~64세에서 더 큰 예방 효과를 시사한다.

Key Message
In this study, we examined the impact of different types of rice consumption on the risk of periodontitis using large-scale data from Korea. The group that consumed only multigrain rice was less likely to have periodontitis than the group that consumed only white rice (odds ratio [OR]=0.80; 95% confidence interval [CI], 0.69–0.93). The risk of periodontitis was reduced by 24% in female who consumed only multigrain rice, 16% decrease in the 40–64 age group, and in the diabetic stratification model, the normal group who consumed only multigrain rice had a 25% decrease in periodontitis risk.

Citations

Citations to this article as recorded by

Trends and Characteristics of Brown Rice Consumption among Adults in Japan: An Analysis of the National Health and Nutrition Surveys, 2012–2019
Nayu Ikeda, Miwa Yamaguchi, Nobuo Nishi
Nutrients.2024; 16(10): 1473. CrossRef
Is Starch Intake Associated With Periodontal Status? An 11‐Year Longitudinal Analysis Among Finnish Adults
F. H. Jangda, A. L. Suominen, A. Lundqvist, S. Männistö, A. Golkari, E. Bernabé
Journal of Clinical Periodontology.2024;[Epub] CrossRef

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