Table 4.

Table 4a. Estrogen use among women study participants
	ERT USED	No ERT
Age	63.97 (9.98) years	74.4 (13.4) years
Education	11.6 (4.6) years	7.1 (8.4) years
AD	19 (5%)	361 (95%)
Unaffected	77 (21%)	289 (79%)

Table 4b. Estrogen use, APOE genotype and risk of AD among women study participants
ε4	ERT	Number at Risk	AD	OR*	95%CI	Significance
−	−	348	178 (51.1%)	1.0	--	Reference
−	+	53	5 (9.4%)	0.2	0.1–0.5	p = 0.002
+	−	305	185 (60.7%)	1.9	1.3–2.9	p < 0.001
+	+	43	14 (32.6%)	0.8	0.3–1.8	p = 0.533

Differences are statistically significant, p<0.001

^*= adjusted for age and education