ArticleJournal of epidemiology2023
Did Dental Insurance Expansion Improve Dental Care Needs Among Korean Adults? Difference in Difference Analysis.
Article in Journal of epidemiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
10 citing papers in PubMed, 11 citations in OpenAlex.
- Article
- Observation of the internal structure of the mandible related to implant placement in the mandibular anterior region.Anatomy & cell biology · 2026Article
- Understanding poor oral health among older adults in Türkiye: socioeconomic and healthcare access challenges.BMC oral health · 2025Article
- Oral Health Differences Between Middle-Aged and Older Adults in South Korea.International dental journal · 2025Article
- Dental implant removal rates and related factors in older adults in Korea: a cross-sectional study using National Health Insurance Sharing Service database.Epidemiology and health · 2025Article
- The Effects of the Expansion of Dental Care Coverage for the Elderly.Healthcare (Basel, Switzerland) · 2024Article
- Analysis of Dental Prosthetic Treatment in Patients with Cancer Aged 65 Years and Older after Expanded Health Insurance Coverage: A Retrospective Clinical Study.Medicina (Kaunas, Lithuania) · 2024Article
- Patterns and factors associated with dental service utilization among insured people: a data mining approach.BMC medical informatics and decision making · 2024Article
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Corrections and comments
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Authors and funding
3 authors at 2 institutions in 2 countries.
Funding
Abstract
backgroundIn 2012, the Korean government expanded dental insurance for the elderly to promote improved access to dental care. We examined the causal effect of this policy on dental care needs, focusing on low-income older adults.
methodsWe compared data before and after policy implementation using double difference (DD) and triple difference (DDD) analyses. We used the nationally representative data from the Korea National Health and Nutrition Examination Survey from 2010 and 2016-2018. Individuals aged ≥65 years were included in the treatment group, and individuals aged <65 years were included in the control group.
resultsDental insurance expansion was associated with a paradoxical increase in perceived unmet dental needs among elderly individuals (8.8 percentage points increase, 95% CI: 4.7 to 13.0). However, there were improvements in dental prosthetics outcomes (denture wearing [4.0 percentage points, 95% CI: 0.2 to 7.9] and dental implants [5.0 percentage points, 95% CI: 2.1 to 7.9]; P < 0.01). Upon analyzing low-income elderly individuals using DDD analysis, we found that the insurance expansion led to a 21.6% smaller increase in unmet dental needs among low-income adults, compared to high-income adults (95% CI, -35.0 to -8.5; P < 0.01).
conclusionDental insurance expansion in South Korea resulted in improvements in access to dental prosthetic services overall. It also led to a smaller increase in unmet dental needs among low-income older adults, compared to high-income adults.
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Registered trials
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