Table 3. Means, Standard Deviations, Differences, and t-tests by Experimental Group for Sample's Observed Raw Data across Study.

Month of study (M)		Base-Line	M2	M3	M4	M5	M6	M8	M10	M12	All Months
Perceived stress (Short Zarit Burden Interview- Bedard)	Mean	21.86	21.43	20.65	20.00	20.15	19.92	19.09	21.10	20.70	20.74
	(SD)	(8.83)	(7.70)	(8.97)	(8.15)	(9.04)	(8.88)	(8.61)	(9.55)	(10.48)	(8.62)
	Diff.	5.14	5.44	5.16	3.94	4.32	3.76	5.60	6.87	7.40	5.13
	t-test	2.11	2.53	2.06	1.55	1.52	1.31	1.91	2.08	1.92	5.81
	df	47	44	46	38	37	36	30	28	25	333.38
r1=0.53	(p)	(.04)	(.02)	(.05)	(.13)	(.11)	(.14)	(.07)	(.05)	(.07)	(0.000)
Emotional-behavioral responses (CES-D & NegPANAS combined*)	Mean	.102	-.011	-.086	.058	.054	-.048	-.147	.069	-.021	-.002
	(SD)	(.906)	(.942)	(.977)	(.908)	(.879)	(.866)	(.742)	(.932)	(.935)	(.90)
	Diff.	0.34	0.48	0.27	0.56	0.36	0.23	0.54	0.52	0.55	0.415
	t-test	1.33	1.87	0.98	2.01	1.31	.82	2.14	1.84	1.42	4.51
	df	47	41.99	47	38	38	37	23.05	29	31	354.47
r1=0.48	(p)	(.19)	(.07)	(.33)	(.06)	(.20)	(.42)	(.04)	(.08)	(.17)	(0.000)
Behavioral Symptoms (Neuro-Psychiatric Inventory-Questionnaire-Behaviors)	Mean	11.58	9.49	11.00	11.22	9.04	9.70	10.61	11.07	11.44	10.55
	(SD)	(7.12)	(7.17)	(7.53)	(7.14)	(6.80)	(7.00)	(6.98)	(7.95)	(8.44)	(7.28)
	Diff.	2.92	3.34	4.60	2.35	0.063	1.89	2.56	2.89	3.14	3.01
	t-test	1.18	1.36	2.12	.98	.03	.82	1.04	1.53	1.65	3.72
	df	32	31	43	34	34	35	30	27	20.5	293.98
	(p)	(.25)	(.19)	(.04)	(.33)	(.98)	(.42)	(.31)	(.14)	(.11)	(0.000)

^*combined z-scores from Center for Epidemiologic Study-Depression and negative portion of the Positive & Negative Affect Schedule.

¹correlation with outcome, Behavioral Symptoms of Dementia, across all data points

Note: SD= standard deviation; Diff.= difference in means between control and experimental subjects.