. Author manuscript; available in PMC: 2015 Feb 5.

Published in final edited form as: J Obstet Gynecol Neonatal Nurs. 2014 Apr 22;43(3):282–293. doi: 10.1111/1552-6909.12312

Table 2.

Effect sizes of intervention participation (>=4 modules) on labor and postpartum outcomes

Outcome	Observation group n=43		Intervention group n=17		P	Cohen’s d	Effect size r	Variance explained	Effect size
Outcome	M (SD)	SEM	M (SD)	SEM	P	Cohen’s d	Effect size r	Variance explained	Effect size
PDEQ score	16.0 (7.1)	1.1	13.4 (3.5)	0.8	.07	.46	.23	5%	medium
Labor rating	5.5 (2.8)	2.2	6.8 (2.8)	0.7	.14	.47	.23	5%	medium
PCQ score	54.9 (9.3)	1.4	61.1 (11.9)	2.9	.04	.58	.28	8%	medium
PTSD symptoms	3.7 (2.9)	0.4	2.9 (2.6)	0.6	.34	.33	.16	3%	small
PDSS score	73.3 (19.7)	3.0	68.5 (22.4)	5.4	.41	.23	.11	2%	small
PBQ score	18.4 (6.5)	1.0	16.3 (6.7)	1.6	.26	.35	.17	3%	small

Abbreviations: PDEQ, Peritraumatic Dissociation Experiences Scale: PCQ, Perception of Care Questionnaire; PTSD, Posttraumatic Stress Disorder; PDSS, Postpartum Depression Screening Scale; PBQ, Postpartum Bonding Questionnaire.