J Dent Hyg Sci.  2019 Dec;19(4):245-253. 10.17135/jdhs.2019.19.4.245.

Relationships between Depression, Oral Dryness, and Oral Health-Related Quality of Life among Elderly in Korea

Affiliations
  • 1Department of Dental Hygiene, Yonsei University Wonju College of Medicine, Wonju 26426, Korea.
  • 2Department of Dental Hygiene, Yonsei University Graduate School, Seoul 03722, Korea.
  • 3Department of Preventive Medicine and Public Health, Yonsei University College of Medicine, Seoul 03722, Korea.
  • 4Department of Dental Hygiene, Hanyang Women's Institute of Technology, Seoul 04763, Korea.
  • 5Department of Dental Hygiene, Yeoju Institute of Technology, Yeoju 12652, Korea. yudhjhs@naver.com

Abstract

BACKGROUND
This study aimed to analyze correlations between depression, cognitive function, oral health state, ability to perform activities of daily living, oral dryness symptoms, and oral health-related quality of life, and determine factors influencing the latter.
METHODS
This was a cross-sectional study based on questionnaires completed by 260 participants with suspected dementia, residing in South Korea. Psychiatrists, psychiatric nurses, and dental hygienists visited clinics in the participating regions for examination and questionnaire administration. General characteristics, the geriatric depression scale, ability to perform activities of daily living, cognitive function, oral health state, and oral health-related quality of life were analyzed. Independent t-tests, one-way analysis of variance (ANOVA), correlation analysis and multiple regression analysis were conducted, identifying factors affecting oral health-related quality of life. Data analysis was performed using SPSS ver. 20.0 (IBM Corp., USA), and the significance was set at p<0.05.
RESULTS
Approximately 65.0% of participants were female, 63.5% were in their 70s, and 90.0% had health insurance. About 21.5%, 42.0%, and 36.5% were normal, slightly impaired, and had dementia, respectively. High cognitive impairment was associated with poor oral health. Sex, education levels, marital status, and living arrangements influenced oral health-related quality of life. According to the regression analysis, geriatric depression and oral dryness affected the Geriatric Oral Health Assessment Index scores.
CONCLUSION
In conclusion, oral dryness and depression levels among elders influenced oral health-related quality of life. The results showed that to enhance elders' oral health-related quality of life, it is essential to not only improve their oral health state, but also relieve oral health problems, especially oral dryness, and take into consideration their psychological aspects.

Keyword

Aged; Cognition; Depression; Oral health; Quality of life
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