TABLE 1.

Study Sample Characteristics

	Add-on n = 2,698	No Add-on n = 4,411	P Value
Age, years, mean [SD]	65.6 [11.4]	67.5 [10.4]	< 0.001
18-44, % (n)	5.3 (144)	3.4 (148)	< 0.001
45-64, % (n)	30.5 (822)	25.4 (1,122)
≥ 65, % (n)	64.2 (1,732)	71.2 (3,141)
Sex, % (n)
Male	52.2 (1,409)	50.6 (2,233)	0.190
Female	47.8 (1,289)	49.4 (2,178)
Race/ethnicity, % (n)a
Non-Hispanic white	62.2 (1,679)	62.4 (2,752)	< 0.001
Non-Hispanic black	9.8 (265)	13.2 (582)
Hispanic	0.0 (0)	0.0 (0)
Other/unknown	28.0 (754)	24.4 (1,077)

Note: Chi-square test was used to compare categorical variables, and t-test was used for for continuous age.

^aRace/ethnicity data were only available for Medicare Advantage members. All commercially insured members in the sample were marked as “unknown.”

SD = standard deviation.