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Minoura A, Ihara Y, Kato H, Murakami K, Watanabe Y, Hirano K, Ito Y, Kokaze A. Oral Diadochokinesis, Tongue Pressure, and Lip-Seal Strength Among Japanese Male Workers in the Taxi Industry: A Cross-Sectional Study. Clin Pract 2024; 14:2499-2506. [PMID: 39585024 PMCID: PMC11587113 DOI: 10.3390/clinpract14060196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2024] [Revised: 10/26/2024] [Accepted: 11/11/2024] [Indexed: 11/26/2024] Open
Abstract
Background/Objectives: Health management in workers in the taxi industry is particularly challenging due to irregular working hours and the need to prevent fatal accidents. In addition, drivers in Japan are aging, and the early prevention of age-related deterioration in oral health is an increasingly important issue. The aim of this cross-sectional study was to investigate the relationships between oral diadochokinesis (OD), tongue pressure, and lip-seal strength in Japanese male taxi workers. Methods: Measurements of tongue pressure and lip-seal strength were performed by dentists using specialized equipment. OD was measured using the number of consecutive "Pa", "Ta", and "Ka" vocalizations that could be produced in 5 s. We performed multiple regression analysis to examine the effects of lip-seal strength and tongue pressure on OD. Results: The study included 437 participants, excluding 17 who could not complete all oral cavity measurements. Tongue pressure showed a significant positive correlation with "Pa", "Ta", and "Ka" (correlation coefficients: 0.527-0.680). Lip-seal strength was not significantly correlated with OD. Tongue pressure showed a significant positive correlation with "Pa", "Ta", and "Ka". In the results of multiple regression analyses without the elderly participants, tongue pressure was associated with "Pa" (β[95% confidence interval]: 0.574[0.304, 0.843]), "Ta" (0.436[0.231, 0.640]), and "Ka" (0.424[0.210, 0.639]), and lip-seal strength was associated with "Pa" (0.128[0.032, 0.224]) and "Ka" (0.083[0.006, 0.160]). Conclusions: OD may be associated with lip-seal strength and tongue pressure even without including elderly workers. Regardless of age, maintaining good OD may help maintain lip-seal strength and tongue pressure, which may play a role in reducing the risk of age-related oral disorders.
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Affiliation(s)
- Akira Minoura
- Department of Hygiene, Public Health and Preventive Medicine, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Yoshiaki Ihara
- Division of Oral Functional Rehabilitation Medicine, Department of Special Needs Dentistry, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
| | - Hirotaka Kato
- Division of Oral Functional Rehabilitation Medicine, Department of Special Needs Dentistry, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
| | - Kouzou Murakami
- Department of Radiology, Division of Radiation Oncology, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Yoshio Watanabe
- Division of Respiratory Medicine and Allergology, Department of Medicine, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Kojiro Hirano
- Department of Otorhinolaryngology Head and Neck Surgery, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Yoshinori Ito
- Department of Radiology, Division of Radiation Oncology, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Akatsuki Kokaze
- Department of Hygiene, Public Health and Preventive Medicine, School of Medicine, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
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Shirobe M, Edahiro A, Motokawa K, Morishita S, Motohashi Y, Matsubara C, Iwasaki M, Watanabe Y, Hirano H. Feasibility of Oral Function Evaluation According to Dementia Severity in Older Adults with Alzheimer's Disease. Nutrients 2024; 16:992. [PMID: 38613025 PMCID: PMC11013786 DOI: 10.3390/nu16070992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
Oral function evaluation in older adults with dementia is important for determining appropriate and practical dietary support plans; however, it can be challenging due to their difficulties in comprehending instructions and cooperating during assessments. The feasibility of oral function evaluation has not been well studied. This cross-sectional study aimed to determine the feasibility of oral function evaluation in older adults with Alzheimer's disease (AD) according to Functional Assessment Staging of Alzheimer's Disease (FAST) stages. In total, 428 older adults with AD (45 men and 383 women; mean age: 87.2 ± 6.2 years) were included. Multilevel logistic regression models were used to examine the prevalence of participants who were unable to perform oral function evaluations, including oral diadochokinesis (ODK), repeated saliva swallow test (RSST), and modified water swallow test (MWST). In comparison to the reference category (combined FAST stage 1-3), FAST stage 7 was associated with the infeasibility of ODK (adjusted odds ratio, 95% confidence interval = 26.7, 4.2-168.6), RSST (5.9, 2.2-16.1), and MWST (8.7, 1.6-48.5, respectively). Oral function evaluation is difficult in older adults with severe AD. Simpler and more practical swallowing function assessments and indicators that can be routinely observed are required.
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Affiliation(s)
- Maki Shirobe
- Research Team for Promoting Independence and Mental Health, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo 173-0015, Japan; (M.S.); (A.E.); (S.M.); (M.I.); (Y.W.); (H.H.)
| | - Ayako Edahiro
- Research Team for Promoting Independence and Mental Health, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo 173-0015, Japan; (M.S.); (A.E.); (S.M.); (M.I.); (Y.W.); (H.H.)
| | - Keiko Motokawa
- Research Team for Promoting Independence and Mental Health, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo 173-0015, Japan; (M.S.); (A.E.); (S.M.); (M.I.); (Y.W.); (H.H.)
| | - Shiho Morishita
- Research Team for Promoting Independence and Mental Health, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo 173-0015, Japan; (M.S.); (A.E.); (S.M.); (M.I.); (Y.W.); (H.H.)
- School of Health Sciences, Meikai University, Chiba 279-8550, Japan
| | - Yoshiko Motohashi
- Research Team for Promoting Independence and Mental Health, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo 173-0015, Japan; (M.S.); (A.E.); (S.M.); (M.I.); (Y.W.); (H.H.)
| | - Chiaki Matsubara
- Research Team for Promoting Independence and Mental Health, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo 173-0015, Japan; (M.S.); (A.E.); (S.M.); (M.I.); (Y.W.); (H.H.)
- Department of Dental Hygiene, University of Shizuoka, Shizuoka Junior College, Shizuoka 422-8021, Japan
| | - Masanori Iwasaki
- Research Team for Promoting Independence and Mental Health, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo 173-0015, Japan; (M.S.); (A.E.); (S.M.); (M.I.); (Y.W.); (H.H.)
- Department of Preventive Dentistry, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Hokkaido 060-8586, Japan
| | - Yutaka Watanabe
- Research Team for Promoting Independence and Mental Health, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo 173-0015, Japan; (M.S.); (A.E.); (S.M.); (M.I.); (Y.W.); (H.H.)
- Gerodontology, Department of Oral Health Science, Hokkaido University, Hokkaido 060-8586, Japan
| | - Hirohiko Hirano
- Research Team for Promoting Independence and Mental Health, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo 173-0015, Japan; (M.S.); (A.E.); (S.M.); (M.I.); (Y.W.); (H.H.)
- Dentistry and Oral Surgery, Tokyo Metropolitan Geriatric Hospital, Tokyo 173-0015, Japan
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