TABLE 1.

Demographic Data

	2012	2013	Change
Eligible members	22,314,101	22,745,508	431,407 (1.9%)
Prescription medication users	14,960,649	15,110,518	149,869 (1.0%)
Prevalence of prescription medication users (%)	67.0	66.4	-0.9
Average age, years (SD)	36.9 (20.7)	36.8 (20.6)	-0.1 yr
Female	11,508,347	11,713,474	1.8%
Percent female	51.6	51.5	-0.2
Compound users	245,285	323,501	78,216 (31.9%)
Prevalence of compound users (%)	1.1	1.4	27.3
Average age, years (SD)	41.8 (21.3)	42.3 (21.1)	0.5 yr
Female	162,471	212,590	30.8%
Percent female	66.2	65.7	-0.8

SD = standard deviation.