Table 1.

Descriptive characteristics of the data sample (total sample size: 184,252).

Variable	Level	Booster		Non-booster
		N = 78822	%	N = 105430	%
Age	18–25	3934	5.0	14928	12.5
	25–45	15539	19.7	39806	38.5
	45–75	47572	60.4	43677	42.2
	75+	11777	14.5	7019	6.8
Gender	Female	44383	56.3	54221	51.4
	Male	34431	43.7	51154	48.6
Race	White	44425	56.4	66520	63.1
	Black/African American	1512	1.9	2556	2.4
	Asian	1312	1.7	2611	2.5
	American Indian/Alaska Native	159	0.2	389	0.4
	Pacific islander or Hawaiian	34	0.0	155	0.1
	More than one race	31380	39.8	33199	31.5
Ethnicity	Non-Hispanic	40418	51.3	47902	45.4
	Hispanic	38404	48.7	57527	54.6
Urban	Urban	73491	93.2	96745	91.8
	Rural	5331	6.8	8685	8.1