Yonsei Med J.  2024 Apr;65(4):234-240. 10.3349/ymj.2023.0380.

Trend in the Incidence of Severe Partial Edentulism among Adults Using the Korean National Health Insurance Service Claim Data, 2014–2018

• Go H
• Jung HI
• Ahn SV
• Ahn J
• Shin H
• Amano A
• Choi YH

• KMID: 2554224
• DOI: http://doi.org/10.3349/ymj.2023.0380

Abstract

Purpose
Missing teeth is one of the most important indicators of oral health behavior and the result of dental caries, periodontal disease, and injuries. This study examined a trend in the incidence of severe partial edentulism (SPE) using the Korean National Health Insurance Service (KNHIS) data.
Materials and Methods
Data of adults aged ≥20 years were obtained from the KNHIS for the 2014–2018 period. SPE was defined in dental information within a population with a treatment history of dental scaling as having 1 to 8 natural teeth. Crude incidence rates (CIRs) and age-standardized incidence rates (AIRs) with 95% confidence interval were calculated per 100000 persons. The Cochran Armitage trend (CAT) test and average annual percentage change were used to analyze SPE trends.
Results
The CIRs among Korean adults were from 346.29 to 391.11 in 2014–2016 and from 391.11 to 354.09 in 2016–2018. The AIRs trend statistically increased by 4.31% from 346.29 to 376.80 and decreased by 4.72% from 376.80 to 342.10. The AIRs in men increased by 4.00% and decreased by 3.01%. The AIRs in women decreased by 2.18% and increased by 2.11% (CAT; p<0.01). The AIRs by region and income also showed trends of increase and decrease.
Conclusion
The study showed that the incidence trend of SPE increased and decreased from 2014 to 2018. This result would be able to aid in the planning of public oral health, and may also serve as fundamental data for verifying the impact of the public oral health policies implemented.

Keyword

Severe partial edentulism; incidence; Korean National Health Service Insurance; cohort database