Table 2: Prevalence of oral contraceptive and hormone therapy use in Alberta (Alberta's Tomorrow Project, 2000-2009).

Exposure	Age, yr	Prevalence  (95% CI)
Oral contraceptives: ever use	35-44	92.3 (91.7-93.0)
	45-54	91.1 (90.4-91.8)
	55-64	85.5 (84.5-86.6)
	≥ 65	67.6 (65.3-69.9)
Hormone therapy: ever use	35-44	4.4 (3.9-4.9)
	45-54	25.2 (24.2-26.3)
	55-64	60.3 (58.9-61.7)
	≥ 65	60.5 (58.1-62.9)
Hormone therapy: current use	35-44	2.8 (2.4-3.3)
	45-54	15.5 (14.7-16.4)
	55-64	27.2 (25.9-28.5)
	≥ 65	19.6 (17.6-21.5)

Note: CI = confidence interval.