Influence of Type of Dental Visit on the Incidence of COVID-19 and Related Hospitalisation Among Older People in Japan.

In 2020, the coronavirus disease 2019 (COVID-19) pandemic began worldwide. We examined the association between dental visit status and the incidence of COVID-19 and hospitalisation for it among older people based on medical claims data to help reduce COVID-19 severity. The study included 170,232 people who were 75-85 years old in fiscal 2019, with fiscal 2020 and 2021 serving as the follow-up period to ascertain the status of COVID-19.

Validity of the self-reported number of teeth in independent older people in Japan.

Background: In questionnaire surveys, questions about self-reported number of teeth (SRNT) are often used as a measure oral health. This study investigated the validity of SRNT in older Japanese people.

Methods: In total, 4984 75- and 80-year-old patients who underwent dental examinations were enrolled.