Risk factors for tooth loss in the institutionalised elderly; a six-year cohort study.
OBJECTIVE
The aim of this study was to examine risk factors for tooth loss and edentulism in institutionalised elderly people.


METHODS
Six-year prospective cohort study.


METHODS
Twenty nine of the 30 institutions for elderly people in Kitakyushu, Japan.


METHODS
Four hundred and eighteen of the 1,096 subjects who were dentate at the baseline examination.


METHODS
Factors that influenced tooth loss and edentulism.


RESULTS
In both sexes, older subjects had fewer remaining teeth at baseline. Males lost more teeth than females, and edentulism was also more likely in males than in females. Stepwise multiple linear regression analysis showed that the number of teeth, number of decayed teeth, periodontal pocket depth, and plaque index were significant predictors for the number of teeth lost. The incidence of edentulism was higher in males than in females. Stepwise multiple logistic regression analysis revealed that poorer mental health status, fewer teeth, having deep periodontal pocket, and poorer oral hygiene status were independently associated with the six-year incidence of edentulism.


CONCLUSIONS
Tooth loss in institutionalised elderly people in Japan is related to both poor oral health status and poor mental health status.
Shimazaki
Yoshihiro
Y
Department of Preventive Dentistry, Kyushu University Faculty of Dental Science, Fukuoka, Japan. shimadha@mbox.nc.kyushu-u.ac.jp
Soh
Inho
I
Koga
Toshihiko
T
Miyazaki
Hideo
H
Takehara
Tadamichi
T
D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D003731:Dental Caries / Q000150:complications; D003774:Dental Plaque Index; D003817:Dentition; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007326:Institutionalization; D016014:Linear Models; D016015:Logistic Models; D008297:Male; D008603:Mental Health; D008875:Middle Aged; D009066:Mouth, Edentulous / Q000209:etiology; D009911:Oral Hygiene Index; D010514:Periodontal Pocket / Q000150:complications; D011446:Prospective Studies; D012307:Risk Factors; D012737:Sex Factors; D016388:Tooth Loss / Q000209:etiology*