Pearson’s Product Moment Correlations and Point-Biserial Correlations

	Mean [SD] N [%]	Age	Education	Cognitive Status	Illness Burden	Depressive Symptoms	Social Interaction	Perceived Social Support	Instrumental Social Support	Family Criticism	Functional Impairment
Gender [Female]	466 [63.4%]	−.08*	.18**	−.07	−.01	−.21**	−.04	.02	.06	.09	− 14**
Age	75.14 [6.89]	−	− 11**	−.26**	.25**	.06	−.10**	−.04	.04	−.10**	.28**
Education	14.03 [2.61]	−	−	.41**	−.13**	−.16**	.25**	.18**	.05	−.09*	−.24**
Cognitive Status	27.61 [2.49]	−	−	−	−.16**	−.09*	23**	.18**	.04	−.06	−.26**
Illness Burden	7.55 [3.00]	-	-	-	-	.33**	- 17**	- 17**	-.07	.05	.59**
Depressive Symptoms	8.73 [6.05]	-	-	-	-	-	-.20**	-.36**	.01	.20**	.39**
Social Interaction	8.96 [1.58]	-	-	-	-	-	-	.31**	-.18**	-.12**	-.21**
Perceived Social Support	19.51 [2.19]	-	-	-	-	-	-	-	-.31**	-.42**	-.28**
Instrumental Social Support	14.81 [2.38]	-	-	-	-	-	-	-	-	.04	-.04
Family Criticism	1.99 [2.95]	-	-	-	-	-	-	-	-	-	.07
Functional Impairment	21.79 [13.20]	-	-	-	-	-	-	-	-	-	-

Note: Cognitive status = MMSE score; Functional Impairment = Karnofsky Performance Scale; Illness Burden= Cumulative Illness Rating Scale score; Depressive Symptoms= Hamilton Depression Rating Scale score; Social Interaction, Perceived Social Support, and Instrumental Support = Duke Social Support Index subscale scores; Family Criticism = Family Emotional Involvement and Criticism Scale;

^*p<.05;

^**p<.01