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

Published in final edited form as: Psychosom Med. 2016 Jul-Aug;78(6):667–676. doi: 10.1097/PSY.0000000000000316

Table 3.

Group responses to the journaling task post- intervention.

	Gratitude Journaling		Treatment as Usual		η ²	Observed Power	P

	Rest	Journaling	Rest	Journaling
log RMSSD mean (SD)	3.68	3.85	3.56	3.32	.14	.51	.049
log RMSSD mean (SD)	(0.75)	(0.80)	(0.80)	(0.81)	.14	.51	.049
log HF power mean (SD)	5.60	5.91	5.51	4.88	.12	.41	.084
log HF power mean (SD)	(1.89)	(1.72)	(1.52)	(1.45)	.12	.41	.084
log SD1 mean (SD)	3.31	3.48	3.19	2.98	.15	.57	.036
log SD1 mean (SD)	(0.75)	(0.78)	(0.80)	(0.79)	.15	.57	.036

Group differences were determined using repeated measures ANCOVAs, adjusting for %LVEF and Stage B etiology. P values represent group x time interactions. ANCOVA = analysis of co-variance; LVEF= left ventricular ejection fraction; SD= standard deviation; η² = partial eta squared; RMSSD = root mean square successive differences; HF power = high frequency power; SD1 = standard deviation of the distances of the RRi to the slope of the line.