title: Association of personality traits with oral health-related quality of life independently of objective oral health status: a study of community-dwelling elderly Japanese.
abstract: OBJECTIVE
  Oral health-related quality of life (OHRQoL) is being increasingly used in epidemiologic studies of dentistry. However, patient-reported OHRQoL does not always coincide with clinical measures. Previous studies have shown a relationship between OHRQoL and personality, but did not concomitantly investigate oral function. We aimed to examine the association among personality traits, oral function, and OHRQoL using a large sample of community-dwelling Japanese elderly.
  
  
  METHODS
  The participants (n = 938; age, 69-71 years) were drawn from a complete enumeration of an urban area and a rural area of both the Tokyo metropolitan area and Hyogo Prefecture. The self-perceived impact of OHRQoL was measured using the Geriatric Oral Health Assessment Index (GOHAI). The oral status and socioeconomic characteristics were recorded in each participant, and personality traits (neuroticism, extraversion, openness to experience, agreeableness, and conscientiousness) were assessed with the NEO-five-factor inventory. Multiple linear regression analysis was performed to examine the relationships between OHRQoL and other factors, with p < 0.05 considered to be statistically significant.
  
  
  RESULTS
  Neuroticism was negatively associated with the GOHAI score in bivariate analyses (Spearman rank-order correlation coefficient (rs )= -0.20), whereas extraversion was positively associated (rs = 0.17). In the regression analyses, neuroticism (standardized partial regression coefficient (β) = -0.179) and extraversion (β=0.094) were significantly associated with the GOHAI scores independently of the number of teeth, maximal occlusal force, and financial status.
  
  
  CONCLUSIONS
  Personality traits are associated with OHRQoL independently of objective measures of oral health status in community-dwelling elderly Japanese.
  
  
  CONCLUSIONS
  This study showed personality traits are associated with OHRQoL independently of dental status and oral function in old Japanese people. As elderly patients undergo increasingly complex dental treatments, there is a need to evaluate patient personality traits prior to dental treatment and predict patient expectations and responses to planned treatment. This is advantageous in determining the most appropriate therapy.
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Takeshita
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan. Electronic address: ikebe@dent.osaka-u.ac.jp.
authors.forename: Kazunori
authors.initials: K
authors.lastname: Ikebe
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Kagawa
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Okada
authors.affiliation: Department of Clinical Thanatology and Geriatric Behavioral Science, Osaka University Graduate School of Human Sciences, Osaka, Japan.
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Gondo
authors.affiliation: Department of Clinical Thanatology and Geriatric Behavioral Science, Osaka University Graduate School of Human Sciences, Osaka, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nakagawa
authors.affiliation: Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan.
authors.forename: Yoshiko
authors.initials: Y
authors.lastname: Ishioka
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Chisato
authors.initials: C
authors.lastname: Inomata
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Sayaka
authors.initials: S
authors.lastname: Tada
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Matsuda
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Kurushima
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Kaori
authors.initials: K
authors.lastname: Enoki
authors.affiliation: School of Allied Health Sciences, Osaka University Graduate School of Medicine, Osaka, Japan.
authors.forename: Kei
authors.initials: K
authors.lastname: Kamide
authors.affiliation: Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan.
authors.forename: Yukie
authors.initials: Y
authors.lastname: Masui
authors.affiliation: Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan.
authors.forename: Ryutaro
authors.initials: R
authors.lastname: Takahashi
authors.affiliation: Keio University, School of Medicine, Tokyo, Japan.
authors.forename: Yasumichi
authors.initials: Y
authors.lastname: Arai
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Maeda
mesh_terms: D000368:Aged; D005260:Female; D015577:Geriatric Assessment; D006304:Health Status; D006801:Humans; D007564:Japan; D008297:Male; D008409:Mastication; D009909:Oral Health; D010551:Personality; D011788:Quality of Life / Q000523:psychology*
keywords: Elderly people; Multivariate analysis; Occlusal force; Personality traits; Quality of life