Table 3.

Results of Ordered Logistic Regression: Parental Education Regressed on Cognitive Status^a

Characteristic		Odds Ratio	P Value	95% Confidence Interval
Regardless of ApoE status:
High maternal and high paternal education		1.0	(reference)
High maternal and low paternal education		1.1	.707	0.6–2.4
Low maternal and high paternal education		2.2	.108	0.8–5.8
Low maternal and low paternal education		1.9	.031	1.1–3.2
With ApoE status:
High maternal and high paternal education	No ApoE ε4 alleles	1.0	(reference)
High maternal and low paternal education	No ApoE ε4 alleles	1.2	.669	0.5–3.0
Low maternal and high paternal education	No ApoE ε4 alleles	2.9	.030	1.1–7.3
Low maternal and low paternal education	No ApoE ε4 alleles	1.9	.025	1.1–3.5
High maternal and high paternal education	1–2 ApoE ε4 alleles	2.0	.041	1.0–3.9
High maternal and low paternal education	1–2 ApoE ε4 alleles	1.6	.378	0.5–5.1
Low maternal and high paternal education	1–2 ApoE ε4 alleles	2.7	.255	0.5–15.2
Low maternal and low paternal education	1–2 ApoE ε4 alleles	3.7	.004	1.6–8.7

^aCognitive status was modeled in 3 categories: normal, cognitively impaired but no dementia, and dementia. All odds ratios were adjusted for age.