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KMID : 0355420220460030147
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Journal of Korean Academy of Oral Health
2022 Volume.46 No. 3 p.147 ~ p.153
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Analysis of the trends in the disparities of toothbrushing and dental care use by household income level using the data from the Korea National Health and Nutrition Examination Survey
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Jung Se-Hwan
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Abstract
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Objectives: This study aimed to analyze the trends of the gap in toothbrushing and dental care according to the household income level of all people using the Korea National Health and Nutrition Examination Survey (the KNHANES) data.
Methods: Data from 2007-2020 were downloaded from the KNHANES website. Data integration and analysis were conducted for each wave. The prevalence of toothbrushing less than twice a day, toothbrushing after lunch, unmet dental care needs, regular dental check-ups, and preventive dental services use were each estimated based on the data users’ guidebook. The absolute difference (AD) between the lowest and highest income level and the prevalence ratio (PR) were calculated.
Results: The prevalence of toothbrushing less than twice a day and toothbrushing after lunch improved by 5.3% and 13.6%, respectively. However, AD decreased by 4.5% and 2.4%, respectively. The step-wise social gradient in the PR of these indicators was maintained. The prevalence of unmet dental care needs improved substantially from 38.7% in Wave 4 to 21.0% in Wave 7. However, AD and PR were the poorest in Wave 7. The prevalence of regular dental check-ups and preventive dental service use improved steadily by Wave 8 to 45.0% and 37.0%, respectively. However, AD in Wave 8 was ―16.8% for the prevalence of regular dental check-ups and ―12.2% for preventivedental service use. The social gradient in the PR was maintained.
Conclusions: While toothbrushing and dental care use have improved over the past decade, disparity by income level has not been noticeably reduced. This study’s results also reflected the achievements and limitations of the Korean government’s policies and projects for toothbrushing and dental hygiene habits.
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KEYWORD
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Disparity, Household income, Preventive dental service, Regular dental check-up, The KNHANES, Toothbrushing, Unmet dental care need
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