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Relationship between Mortality and Oral Function of Older People Requiring Long-Term Care in Rural Areas of Japan: A Four-Year Prospective Cohort Study

Author

Listed:
  • Shiho Morishita

    (Department of Oral Health Sciences, School of Health Sciences, Meikai University, 1 Akemi, Urayasu-City, Chiba 279-8550, Japan
    Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo 173-0015, Japan
    Division of Welfare, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, 2-746 Asahimachi-Dori, Chuo-Ku, Niigata 951-8518, Japan)

  • Yuki Ohara

    (Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo 173-0015, Japan)

  • Masanori Iwasaki

    (Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo 173-0015, Japan)

  • Ayako Edahiro

    (Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo 173-0015, Japan)

  • Keiko Motokawa

    (Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo 173-0015, Japan)

  • Maki Shirobe

    (Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo 173-0015, Japan)

  • Junichi Furuya

    (Department of Geriatric Dentistry, Showa University School of Dentistry, 2-1-1 Kitasenzoku, Ohta-Ku, Tokyo 145-8515, Japan)

  • Yutaka Watanabe

    (Gerodontology, Department of Oral Health Science, Faculty of Dental Medicine, Hokkaido University, Nishi-7, Kita-13, Kita-ku, Sapporo 060-8586, Japan)

  • Takeo Suga

    (Department of Geriatric Dentistry, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Yokohama 230-8501, Japan)

  • Yayoi Kanehisa

    (Department of Oral Health Sciences, School of Health Sciences, Meikai University, 1 Akemi, Urayasu-City, Chiba 279-8550, Japan)

  • Akitugu Ohuchi

    (Division of Welfare, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, 2-746 Asahimachi-Dori, Chuo-Ku, Niigata 951-8518, Japan)

  • Hirohiko Hirano

    (Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo 173-0015, Japan
    Tokyo Metropolitan Geriatric Hospital, Tokyo 173-0015, Japan)

Abstract

Oral ingestion influences the life sustenance, quality of life, and dignity of older adults. Thus, it is an important issue in medical care and the welfare of older adults. The purpose of this four-year prospective cohort study was to investigate the relationship between mortality and oral function among older adults who required long-term care and were living in different settings in a rural area of Japan. This study included 289 participants aged 65 and older who required long-term care and lived in the former Omorimachi area in Yokote City, Akita Prefecture, located in northern Japan. Following the baseline survey, mortality data were collected over four years; 102 participants (35.3%) died during that time. A significant difference was noted in the overall survival rates between the groups with good and deterioration of oral function such as oral dryness, rinsing ability, swallowing function, and articulation, based on Log-rank test results. After adjusting for various potential confounders using Cox proportional-hazards regression, oral dryness (HR: 1.83, 95% confidence interval: 1.12−3.00) was significantly associated with mortality within four years. This study revealed that oral dryness influences the life prognosis of older adults who receive long-term care in different settings.

Suggested Citation

  • Shiho Morishita & Yuki Ohara & Masanori Iwasaki & Ayako Edahiro & Keiko Motokawa & Maki Shirobe & Junichi Furuya & Yutaka Watanabe & Takeo Suga & Yayoi Kanehisa & Akitugu Ohuchi & Hirohiko Hirano, 2021. "Relationship between Mortality and Oral Function of Older People Requiring Long-Term Care in Rural Areas of Japan: A Four-Year Prospective Cohort Study," IJERPH, MDPI, vol. 18(4), pages 1-13, February.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:4:p:1723-:d:497427
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    Citations

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    Cited by:

    1. Ryuichi Ohta & Emily Weiss & Magda Mekky & Chiaki Sano, 2022. "Relationship between Dysphagia and Home Discharge among Older Patients Receiving Hospital Rehabilitation in Rural Japan: A Retrospective Cohort Study," IJERPH, MDPI, vol. 19(16), pages 1-17, August.
    2. Akiko Shimizu & Ryuichi Ohta & Hana Otani & Chiaki Sano, 2021. "The Contribution of Temporal Flat Lateral Position on the Mortality and Discharge Rates of Older Patients with Severe Dysphagia," IJERPH, MDPI, vol. 18(16), pages 1-9, August.
    3. Maki Shirobe & Ayako Edahiro & Keiko Motokawa & Shiho Morishita & Yuki Ohara & Yoshiko Motohashi & Masanori Iwasaki & Yutaka Watanabe & Hirohiko Hirano, 2023. "Association between Dementia Severity and Oral Hygiene Management Issues in Older Adults with Alzheimer’s Disease: A Cross-Sectional Study," IJERPH, MDPI, vol. 20(5), pages 1-10, February.
    4. Hiroyuki Suzuki & Junichi Furuya & Chiaki Matsubara & Michiyo Aoyagi & Maki Shirobe & Yuji Sato & Haruka Tohara & Shunsuke Minakuchi, 2022. "Comparison of the Amount of Used and the Ease of Oral Care between Liquid and Gel-Type Oral Moisturizers Used with an Oral Care Simulators," IJERPH, MDPI, vol. 19(13), pages 1-10, July.

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