Association between Bone Mineral Density and Oral Frailty on Renal Function: Findings from the Shika Study

Shingo Nakai, Fumihiko Suzuki, Shigefumi Okamoto, Sakae Miyagi, Hiromasa Tsujiguchi, Akinori Hara, Thao Thi Thu Nguyen, Yukari Shimizu, Koichiro Hayashi, Keita Suzuki, Tomoko Kasahara, Masaharu Nakamura, Chie Takazawa, Takayuki Kannon, Atsushi Tajima, Hirohito Tsuboi, Noriyoshi Ogino, Tadashi Konoshita, Toshinari Takamura, Hiroyuki Nakamura

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The association between oral frailty (OFr) and body action has been investigated, but its association with systemic function remains unclear. Therefore, this cross-sectional study examined the association between OFr with decreased bone mineral density (BMD) and renal function in residents of Shika town, Ishikawa Prefecture, Japan aged ≥40 years. This study included 400 inhabitants. The OFr total score was assessed using three oral domains in the Kihon Checklist (a self-reported comprehensive health checklist), the number of teeth, and brushing frequency per day. Measurements were the estimated glomerular filtration rate (eGFR) and the osteo-sono assessment index (OSI). Using a two-way analysis of covariance (p = 0.002), significantly lower OSI was indicated in the eGFR < 60 and OFr group than in the eGFR of < 60 and non-OFr group after adjusting for age, body mass index, and drinking and smoking status as confounding factors. Multiple logistic regression analysis confirmed this relationship (p = 0.006). Therefore, lower BMD seems to be associated with lower renal function only when accompanied by OFr. Further longitudinal studies are needed to confirm these results.

Original languageEnglish
Article number314
JournalHealthcare (Switzerland)
Issue number3
Publication statusPublished - 02-2023
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Leadership and Management
  • Health Policy
  • Health Informatics
  • Health Information Management


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