Table 1.

PICOS criteria for inclusion of studies.

Item	Criteria	Description
Participation	Does the study involve elderly individuals?	Yes
Intervention	NA
Comparator	NA
Outcomes	Does the study report effect on oral health-related multiple outcomes of holistic health?	a. Respiratory diseases b. Malnutrition c. Frailty d. Diabetes mellitus e. Cardiovascular conditions f. Age-related oral changes g. Cognitive impairment h. Depression i. Poor quality of life
Study design	Is the study a systematic review?	Systematic reviews with/without meta-analyses are considered.

NA, not available.