スギモト　ケン   Ken Sugimoto   杉本　研    所属   川崎医科大学  医学部 臨床医学　総合老年医学    職種   教授
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Hardness of the habitual diet and its relationship with cognitive function among 70-year-old Japanese elderly: Findings from the SONIC Study.
掲載誌名	正式名：Journal of oral rehabilitation 略　 称：J Oral Rehabil ISSNコード：13652842/0305182X
掲載区分	国外
巻・号・頁	46(2),pp.151-160
著者・共著者	Okubo Hitomi, Murakami Kentaro, Inagaki Hiroki, Gondo Yasuyuki, Ikebe Kazunori, Kamide Kei, Masui Yukie, Arai Yasumichi, Ishizaki Tatsuro, Sasaki Satoshi, Nakagawa Takeshi, Kabayama Mai, Sugimoto Ken, Rakugi Hiromi, Maeda Yoshinobu,
発行年月	2019/02
概要	BACKGROUND:There is increasing evidence of causal links between poor mastication and cognitive impairment, but possible effects of dietary hardness, which clearly affects mastication, on cognitive function are unknown.OBJECTIVE:We investigated the hypothesis that hardness of the habitual diet would be associated with cognitive function among older Japanese adults.METHODS:The subjects of this cross-sectional study were 635 Japanese community-dwelling people aged 69-71 years. The masticatory muscle activity required for the habitual diet was used to determine dietary hardness. Consumption of 38 foods was assessed by a validated, brief-type, self-administered diet history questionnaire. A published database was then used to estimate the masticatory muscle activity involved in the ingestion of these foods. The Japanese version of the Montreal Cognitive Assessment (MoCA-J) was used for the measurement of cognitive function.RESULTS:The principal contributors to dietary hardness were cooked rice (28.0%), green leafy vegetables (5.1%), dried fish (4.9%), and pork and beef (4.6%). There was a positive association between dietary hardness and MoCA-J score that was robust to adjustment for potential confounders (MoCA-J score per 100-unit increase in dietary hardness: β = 0.83 [95% CI: 0.08, 1.59], P = 0.03). These results did not change materially even after exclusion of subjects who reported substantial changes in their diet for any reason (β = 0.94 [95% CI: 0.02, 1.86], P = 0.04).CONCLUSION:This preliminary cross-sectional study suggests that dietary hardness might have a beneficial effect on cognitive function in older Japanese people. Further prospective studies with more accurate measurements are needed to confirm this finding.
DOI	10.1111/joor.12731
PMID	30325532