Table 6.

Aim I Stratified by Age (younger than 75 n = 1059; 75 or older n = 1494)

Variable	Episodic Memory		Executive Function		Visuoconstruction		Language		Processing
	β		β		β		β		β
	Under 75	75 +	Under 75	75+	Under 75	75+	Under 75	75+	Under 75	75+
Social Network Structure
Network Size	−0.02	−0.00	−0.01	−0.01	−0.04	−0.01	−0.02	−0.00	−0.04	−0.01
Contact frequency	0.04	0.01	0.08*	−0.02*	0.06*	0.05*	0.06*	0.04	0.08*	0.05*
Marital Status	0.01	−0.00	0.08	0.06	0.01	−0.00	−0.02	0.00	−0.02	−0.01
Social Network Quality
Support	−0.03	−0.06*	−0.05	−0.08*	−0.03	−0.07*	−0.02	−0.06*	−0.03	−0.07*
Strain	−0.03	−0.04	−0.05	−0.07*	−0.06*	−0.23*	−0.02	−0.05*	−0.05*	−0.07*
Covariates
Age	−0.12*	−0.25*	−0.12*	0.32*	−0.10*	−0.23*	−0.11*	−0.25*	−0.15*	−0.28*

Note. Additional covariates were left out of the table for simplicity, although included in the model. The episodic memory model R² = 0.44 for under75, and 0.40 for 75 and older. The executive function model R² = 0.55 for under75, and 0.47 for 75 and older. The visuoconstruction model R² = 0.45 for under75, and 0.38 for 75 and older. The language model R² = 0.47 for under75, and 0.44 for 75 and older. The processing speed model R² = 0.49 for under75, and 0.47 for 75 and older.

^*p < .05