【Objective】This study aimed to understand the characteristics of first-time patients at dental clinics offering regular management services. To achieve this, anonymized clinical records routinely documented at dental clinics operated by members of the Japan Healthcare Dentistry Association (hereinafter referred to as participating clinics) were collected. The characteristics of these first-time patients were then compared and analyzed by region.
【Methods and Materials】This study aggregated oral records of first-time patients (total of 16,124 patients with recorded birthdate and gender: 6,952 males, 9,172 females) from 72 clinics nationwide over one year (January 1 to December 31, 2023). The data were grouped into seven clusters based on clinic location for aggregation and analysis. Among member clinics, those capable of submitting digitized oral records for all new patients in principle were requested to cooperate. For children aged 6 years and older, data on the average number of decayed, missing, and filled teeth (DMFT index) per person was collected. For adults, data on the number of remaining teeth, periodontal disease progression, and smoking history (not necessarily complete for all items) was collected. Anonymized records were then aggregated. Using this method, records from over 10,000 new patients have been collected annually since 2005 across 17 surveys. Building on this, this study surveyed new patients in 2023. Participating clinics were divided into seven groups based on the average income of the local residents. Data for each group was compiled and compared regarding: (1) children's DMFT, (2) adult smoking rates by age group, (3) adult periodontal disease progression, and (4) adult current tooth count by age.
【Results】Higher regional economic status of clinic locations was associated with: (1) reduced pediatric DMFT, (2) lower adult smoking rates by age group, (3) decreased in patients with advanced periodontal disease, and (4) increased number of remaining teeth by age group. Compared to past studies, these disparities showed a decreasing trend.
【Conclusion】Oral health disparities are evident among residents not receiving regular dental care. Oral health disparities strongly correlate with regional economic disparities.
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