Impact of periodontal disease and chewing ability on the quality of life of the elderly in an affluent community

Background/Purpose: Improvement of the medical and social environment is an important aspect of government policies in assuring the quality of life (QoL) of older adults. However, few studies have appraised the impact and relationship of QoL with clinical factors among elderly individuals in affluent residential areas. Methods: A total of 166 older adults from Chang Gung Health and Culture Village were enrolled. Oral health-related QoL was measured using the Geriatric Oral Health Assessment Index. Self-assessed chewing abilities and demographic characteristics were collected by questionnaire. Physical health was scored by activities of daily living (ADL) and instrumental ADL. Mini nutrition assessment questionnaire was used to evaluate the nutritional intake. Multiple linear regression was used to predict risk factors affecting QoL and to examine whether chewing ability was a mediator of oral health-related QoL. Results: Poor chewing ability was associated with older age (OR = 1.82 for 76–85 years and 3.58 for 86–95 years), sufficient economic status (OR = 5.55) and removable denture-wearing (OR = 7.52). On the other hand, poor chewing ability (OR = 0.11), removable denture-wearing (OR = 0.48), periodontal disease (OR = 0.38) had lower likelihood of good oral health-related QoL. Mediator analyses showed that chewing ability was a mediator for the association between oral health-related QoL and economic status or removable denture-wearing or having more than 20 teeth. Periodontal disease was an independent factor for oral health-related QoL. Conclusion: Among older adults in an affluent community, periodontal disease is an independent risk factor directly related to oral health-related QoL, whereas chewing ability is a mediator between QoL and removable denture-wearing.