A Validation Study of the National Database of Health Insurance Claims and Specific Health Checkups of Japan Regarding the Annual Number of Tooth Extractions Performed Across the Entire Japanese Population

Seitaro Suzuki, Naoki Sugihara, Hideyuki Kamijo, Manabu Morita, Takayuki Kawato, Midori Tsuneishi, Keita Kobayashi, Yoshihiro Hasuike, Tamotsu Sato

Research output: Contribution to journalArticlepeer-review

Abstract

This report describes a validation study of data in the National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB) obtained by nationwide surveys on tooth extractions. The following 3 data sources on tooth extractions in Japan were compared: (1) the Nationwide Survey of the Reasons for Permanent Tooth Extractions in Japan (a previous survey conducted by the present authors); (2) the Statistics on Medical Care Activities in Public Health Insurance; and (3) the 4th NDB Open Data Japan. Source 1 was a nationwide survey conducted in 2018; sources 2 and 3 comprised data that are freely available for use by the public. In Source 1, 2,345 of 5,250 dentists approached responded to the questionnaire (recovery rate: 44.8%). The number of extracted teeth among younger age groups (aged 25-50 years) reported in Source 1 was lower than that in the other two sources. In contrast, the number of extracted teeth among older age groups reported in Source 1 was higher than that reported in the other two sources. However, when stratified by age group, all differences across the 3 sources regarding the mean annual number of tooth extractions were <0.05 teeth/year. The present results suggest that the NDB is a reliable resource for data on tooth extractions performed across the entire Japanese population.

Original languageEnglish
Pages (from-to)235-243
Number of pages9
JournalThe Bulletin of Tokyo Dental College
Volume62
Issue number4
DOIs
Publication statusPublished - Dec 4 2021

Keywords

  • National database
  • Population-based survey
  • Tooth loss
  • Validation

ASJC Scopus subject areas

  • Medicine(all)

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