Factors Related to Regular Dental Check-Ups in Adults With Intellectual Disabilities in Japan

We investigated the factors associated with regular dental check-ups among adults with intellectual disabilities in Japan, with the aim of increasing the attendance rate of regular dental check-ups, which are important for maintaining the oral health of persons with intellectual disabilities.

A questionnaire survey focused on oral health was conducted with 971 adults with intellectual disabilities in Japan. The survey included questions related to disability diagnosis, severity of intellectual disability, residence type, and several oral-health factors, including proxy-reported number of teeth, presence of a family dentist, frequency of regular dental check-ups, tooth-brushing habits, and availability of a dental hygienist at a facility. Logistic regression analysis was used to determine the association between regular dental check-ups (dependent variable) and independent variables. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated.

In a multivariate analysis, sex, diagnosis of disability, severity of intellectual disability, residence type, and the presence of a family dentist were significantly associated with regular dental check-ups. The ORs for nonregular dental check-ups were significantly higher for adults with Down syndrome, those with mild disability, and those living at home with family; the respective mean ORs (95% CIs) were 2.3 (1.2-4.4), 3.3 (1.3-8.4), and 1.8 (1.1-3.0). The absence of a family dentist had a particularly strong association with a lack of regular dental check-ups, with a mean OR (95% CI) of 15.0 (8.7-26.0).

Regular dental check-ups among adults with intellectual disabilities in Japan were associated with sex, diagnosis of disability, severity of disability, type of residence, and the presence of a family dentist.