Table 1.

Characteristics of periodontal disease.

	References
Prevalence and severity increased in elderly people	[28,40,41]
Prevalence significantly higher in males	[28,42,43]
Highest prevalence in racial and ethnic minorities	[28,44,45]
Higher severity associated with lower socioeconomic status and education	[28,46,47]
Association with respiratory infection (pneumonia and COPD)	[36,48,49]