Table 1.

Descriptive statistics of the analysis sample

Variables*,†	Mean [SD]	Frequency
Perceived risk of AD in the next 10 years (in % chance: 0–100)	29.9 [27.1]
Preference for AD prevention: $ willing to pay per month
<5		6.5%
5–25		7.9%
25–100		19.6%
100–250		37.1%
250–1000		22.0%
>1000		7.0%
Longevity expectation (0–100)	48.9 [32.3]
Self-rated memory decline		19.4%
Known risk factors of AD
Age	68.0 [9.66]
Cardiovascular disease/risk factors
Stroke		5.8%
Heart attack		2.7%
Diabetes		19.0%
Physical activity		41.5%
Cognitive functioning (0–27)‡	15.1 [4.59]
Immediate recall (0–10)	5.40 [1.79]
Delayed recall (0–10)	4.42 [2.03]
Subtraction (0–5)	3.57 [1.68]
Backward count (0–2)	1.72 [0.70]
Any limitation in ADL		14.9%
Other sociodemographic characteristics
Female		53.2%
Race/ethnicity
White		81.2%
Black		11.2%
Hispanic		6.0%
Other race		1.5%
Education
Less than high school		23.5%
High school graduate		35.6%
Some college		40.7%
Married		67.4%
Prescription drug coverage		74.9%
Household wealth (−$130,000–$41,639,999)§	391,206 [1,594,994]
Household income (0–$757,000)	51,769

^*Range of values for continuous variables is presented in the parentheses.

^†Total number of participants was 778. For some variables, the number of participants who provided valid answers was as follows: perceived risk of AD (n = 740); preference for AD prevention (n = 760); longevity expectation (n = 714); cognitive functioning (n = 762); and race/ethnicity and education (n = 777).There was no missing value for other variables.

^‡Sum of scores for the four measures in following rows. Nonresponse for each test is excluded (i.e., coded as missing) in the summary statistics.

^§Some individuals (n = 21; 2.7%) had negative net wealth, largely from mortgage debt. Median wealth was $161,500.

Alzheimer’s disease; ADL, activity of daily living.