Table 3.

Hierarchical Regression Analyses Predicting Post-Intervention Depression Symptom Severity (Top Panel, n=135) and Perceived Stress (Bottom Panel, n=134)

	Post-intervention Depression Symptom Severity
	Model 1				Model 2
Predictor		B	SE	t		B	SE	t
Constant		3.31	2.26	1.46		3.06	2.29	1.33
Baseline PHQ		0.37	0.07	5.04**		0.36	0.07	4.96**
Group		−1.63	0.74	−2.20*		−0.89	1.25	−0.71
Gestational age		−0.04	0.08	−0.50		−0.05	0.08	−0.59
Age		−0.04	0.05	−0.81		−.004	0.05	−0.83
Baseline PSQI		0.22	0.08	2.58*		0.28	0.13	2.27*
Baseline PSQI*Group						−0.12	0.16	−0.74
R2	0.31**
ΔR2					0.03
Cohen’s f2	0.45				0.52
	Post-intervention Perceived Stress
	Model 1				Model 2
Predictor		B	SE	t		B	SE	t
Constant		5.16	3.26	1.58		4.04	3.26	1.24
Baseline PSS		0.47	0.08	5.88**		0.45	0.08	5.66**
Group		−1.43	1.26	−1.13		2.14	2.12	1.01
Gestational age		−0.01	0.13	−0.08		−0.05	0.13	−0.34
Baseline PSQI		0.47	0.14	3.32*		0.81	0.21	3.80**
Baseline PSQI*Group						−0.56	0.27	−2.09*
R2	0.36**
ΔR2					0.02
Cohen’s f2	0.56				0.38

Note. PHQ = Patient Health Questionnaire, sleep item removed; PSQI = Pittsburg Sleep Quality Index; PSS = Perceived Stress Scale.

^*p < .05;

^**p < .001