| Reference | Objective | Design | Evidence |
|---|---|---|---|
| Sjogren et al. [498] | A systematic review of the preventive effect of oral hygiene on pneumonia and respiratory tract infection in elderly people in hospitals and nursing homes | MA | 1B+ |
| Awano et al. [499] | To study the risk of death from pneumonia in relation to dental status | CCS | 4C+ |
| Bassim et al. [500] | To study the risk of mortality from pneumonia with oral hygiene care | CCS | 3B+ |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.