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Association of Number of Teeth with ADL/IADL in Korean Middle-Aged and Older Adults: An Analysis of the 7th Korean Longitudinal Study of Aging

Author

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  • Nu-Ri Jun

    (Department of Public Health, Graduate School, Dankook University, Cheonan-si 31116, Korea
    These authors contributed equally to this work.)

  • Jae-Hyun Kim

    (Department of Public Health, Graduate School, Dankook University, Cheonan-si 31116, Korea
    Department of Health Administration, College of Health Science, Dankook University, Cheonan-si 31116, Korea
    These authors contributed equally to this work.)

  • Jong-Tae Park

    (Department of Oral Anatomy, College of Dentistry, Dankook University, Cheonan-si 31116, Korea)

  • Jong-Hwa Jang

    (Department of Public Health, Graduate School, Dankook University, Cheonan-si 31116, Korea
    Department of Dental Hygiene, College of Health Science, Dankook University, Cheonan-si 31116, Korea)

Abstract

We determined the association between the number of natural and implant teeth with activities of daily living (ADL) and instrumental ADL (IADL) levels in middle-aged and older adults aged ≥ 55 years. We included 6,925 participants, who underwent a computer-assisted personal interview in the 7th Korean Longitudinal Study of Aging. After controlling for general characteristics, the associations between the number of natural and implant teeth with ADL and IADL levels were examined using multiple regression analysis. The participants had 21.2 natural teeth and 1.08 implant teeth on average. The ADL and IADL levels were 0.61 and 1.56, 0.40 and 1.16, and 1.10 and 0.31 in participants with ≤ 9, 10–19, and ≥ 20 teeth, respectively. There was no significant association between ADL and the number of natural and implant teeth ( p > 0.05). However, a one-unit increase in IADL score was associated with a reduced number of natural (β = −0.031, p < 0.001) and implant (β = −0.194, p = 0.006) teeth. Difficulties regarding IADL were associated with fewer natural and implant teeth, suggesting that maintaining and managing the number of teeth is critical to promoting the health of middle-aged and older adults.

Suggested Citation

  • Nu-Ri Jun & Jae-Hyun Kim & Jong-Tae Park & Jong-Hwa Jang, 2022. "Association of Number of Teeth with ADL/IADL in Korean Middle-Aged and Older Adults: An Analysis of the 7th Korean Longitudinal Study of Aging," IJERPH, MDPI, vol. 19(19), pages 1-13, October.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:19:p:12840-:d:935487
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    References listed on IDEAS

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    1. Mitchell P. LaPlante, 2010. "The Classic Measure of Disability in Activities of Daily Living Is Biased by Age but an Expanded IADL/ADL Measure Is Not," The Journals of Gerontology: Series B, The Gerontological Society of America, vol. 65(6), pages 720-732.
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