Table 3.

Preference for preventing AD: multivariate linear regression

Dependent variable: preference for AD prevention with six categories (1–6), each indicating WTP (per month) of <$5, $5–25, $25–100, $100–250, $250–1000, and $1000 for a drug preventing AD
	(A) With perceived risk of AD N = 715		(B) Without perceived risk of AD N = 743
	Coefficient (SE)	P-value	Coefficient (SE)	P-value
Perceived risk of AD (0–100)	0.01‡ (0.002)	<0.001
Known risk factors of AD
Age	−0.01* (0.01)	0.10	−0.01 (0.01)	0.14
Cognitive functioning (0–27)	0.03‡ (0.01)	0.01	0.03† (0.01)	0.01
Physical activity	0.02 (0.09)	0.85	0.02 (0.09)	0.79
Stroke	0.07 (0.18)	0.70	0.16 (0.18)	0.39
Heart attack	−0.08 (0.36)	0.83	−0.27 (0.39)	0.49
Diabetes	0.16 (0.12)	0.18	0.19 (0.12)	0.10
Any ADL limitation	−0.34† (0.15)	0.02	−0.28* (0.15)	0.06
Other sociodemographic factors
Female	−0.07 (0.10)	0.46	−0.01 (0.10)	0.93
Race/ethnicity (ref: non-Hispanic white)
Black	0.14 (0.16)	0.40	0.02 (0.16)	0.93
Hispanic	−0.33 (0.21)	0.11	−0.39* (0.22)	0.08
Other race	0.70 (0.44)	0.11	0.55 (0.40)	0.18
Education (ref: high school graduate)
Less than high school	−0.08 (0.13)	0.54	−0.13 (0.12)	0.27
Some college	−0.07 (0.11)	0.49	−0.05 (0.11)	0.60
Married	0.13 (0.11)	0.26	0.16 (0.11)	0.13
Household wealth (/100 k)	0.005‡ (0.002)	0.005	0.005† (0.002)	0.02
Household income (/100 k)	0.08 (0.07)	0.24	0.06 (0.06)	0.38
Prescription drug coverage	0.15 (0.11)	0.18	0.14 (0.11)	0.22
Constant	3.64‡ (0.53)	<0.001	3.75‡ (0.52)	<0.001
R-squared	0.10		0.08

^*P < 0.1,

^†P < 0.05,

^‡P < 0.01.

Coefficient (robust standard errors).

AD, Alzheimer’s disease; ADL, activity of daily living; SE, standard error; WTP, willingness to pay.