. Author manuscript; available in PMC: 2017 Oct 1.

Published in final edited form as: J Aging Health. 2016 Jul 9;29(3):367–388. doi: 10.1177/0898264316635587

Table 3.

Hierarchical Regression Models for Cognitive and Functional Performance Outcomes

Variables	Model 1				Model 2

	β	95% CI (LB,UB)	R²	t	β	95% CI (LB,UB)	R²	t
Executive Function Composite⁺

Age	.29	(.04, .06)		9.14^**	.30	(.04, .06)		9.49^**
Sex	.05	(−.03, .23)		1.57	.07	(.05,.31)		2.25^*
Education	−.26	(−.12,−.07)		−8.02^**	−.24	(−.11, −.07)		−7.43^**
CES-D⁺					.17	(.02,.03)		5.17^**
R²			.14				.17
ΔR²							.03

Speed of Processing Composite

Age	−.39	(−.07, −.06)		−13.37^**	−.40	(−.08, −.06)		−13.86^**
Sex	−.12	(−.36, −.12)		−4.00^*	−.14	(−.40, −.17)		−4.83^**
Education	.30	(.08, .13)		8.61^**	.28	(.08, .12)		9.43^**
CES-D⁺					−.19	(−.04, −.02)		−6.36^**
R²			.25				.28
ΔR²							.03

Memory Composite

Age	−.21	(−.05, −.02)		−6.55^**	−.21	(−.05, −.03)		−6.85^**
Sex	−.13	(−.39, −.14)		−4.10^**	−.15	(−.44, −.18)		−4.86^**
Education	.27	(.08, .13)		8.62^**	.25	(.07, .12)		7.91^**
CES-D⁺					−.18	(−.04, −.02)		−5.79^**
R²			.12				.15
ΔR²							.03

Functional Performance

Timed Instrumental Activities of Daily Living Composite⁺

Age	.38	(.03, .04)		12.27^**	.38	(03, .04)		12.35^**
Sex	.14	(.09, .24)		4.47^**	.15	(.10, .25)		4.70^**
Education	−.17	(−.05, −.03)		−5.56^**	−.16	(−.05, −.02)		−5.25^**
CES-D⁺					.06	(.00, .01)		2.02^*
R²			.18				.19
ΔR²							.01

Note: CES-D – Center for Epidemiologic Studies Depression Scale;

⁺

Lower scores reflect better performance; Executive function, speed of processing, and memory composite scores derived from factor analyses

p ≤ .05,

^**

p < .001