Table 4

Results of meta-regression analyses

Dependent variable	Independent variable	K	β*	95% CI	p Value
Pregnancy	ES—anxiety	6	0.19	0.06 to 0.31	0.004
	Mean age	9	−0.05	−0.19 to 0.10	0.534
	Intervention duration	9	0.01	−0.03 to 0.06	0.669
	Number of sessions	9	−0.00	−0.08 to 1.07	0.922
	Study quality (quality scores)†	10	−0.02	−0.09 to 0.04	0.477
Psych. combined	Mean age	32	−0.05	−0.12 to −0.02	0.214
	Intervention duration	32	0.01	−0.02 to 0.04	0.518
	Number of sessions	27	0.03	−0.01 to 0.07	0.150
	Study quality (quality scores)†‡	35	−0.02	−0.06 to 0.02	0.415

*Mixed effects regression: unrestricted maximum likelihood.
†Modified Jadad quality score.
‡p Values for individual psychological outcomes; 0.09 (anxiety)–0.58 (depression).
Bold typeface indicates a significant result. ES, effect size; Psych, psychological outcomes.