Table 1: Characteristics of the NHANES 2011-2012 sample.

	NHANES
Characteristic	Number	%
Total	3,248
Age, y
30-39	817	25.2
40-49	735	22.6
50-59	693	21.3
60-69	603	18.6
≥ 70	400	12.3
Gender
Male	1,593	49.1
Female	1,655	50.9
Race/ Ethnicity
Mexican American	348	10.7
Other Hispanic	331	10.2
Non-Hispanic White	1,204	37.1
Non-Hispanic Black	816	25.1
Other Race - Including Multi-Racial	549	16.9
Education level
Less than high school	716	22.1
High school or equivalent	679	20.9
Some college or higher	1,851	57.0
	Mean	SD
Number of teeth present (Minimum-maximum)	23.4 (6-28)	5.5
% of sites with PD
≥ 3 mm	11.4	15.6
≥ 4 mm	3.6	8.4
≥ 5 mm	1.2	4.3
≥ 6 mm	0.4	2.3
% of sites with CAL
≥ 3 mm	22.1	24.5
≥ 4 mm	10.6	18.5
≥ 5 mm	5.5	13.4
≥ 6 mm	3.0	9.8