TABLE 1.

Descriptive Characteristics of Participants, Arbitrarily Divided Into Three Age Groups

	Age group
	18–39 years	40–59 years	60–98 years	All	Age r
Number	732	948	817	2,497
Age, years	26.7 (6.2)	50.1 (5.5)	71.3 (7.7)	50.2 (18.7)
Proportion female	.64	.72	.59	.65	−.04
Health self-rating	1.8 (0.8)	1.9 (0.9)	2.1 (0.9)	1.9 (0.9)	.16*
Education, years	15.2 (2.4)	15.8 (2.6)	16.2 (2.9)	15.7 (2.7)	.17*
	Scaled scores
Vocabulary	13.1 (3.2)	12.4 (2.9)	13.3 (2.7)	12.9 (3.0)	.03
Digit Symbol	11.6 (2.9)	11.4 (2.9)	11.7 (2.8)	11.5 (2.8)	.05
Word Recall	12.4 (3.1)	12.5 (3.3)	12.6 (3.2)	12.5 (3.2)	.02
Logical Memory	11.8 (2.7)	11.8 (2.8)	12.4 (2.8)	12.0 (2.8)	.10*

Note. Standard deviations in parentheses.

^*p < .01.