Impact of unintended pregnancy on maternal mental health: a causal analysis using follow up data of the Panel Study on Korean Children (PSKC)

Table 4 Difference in parenting stress scores according to pregnancy intention

	PSM			IPTW
	β (SE)	95% CI	P value	β (SE)	95% CI	P value
Parenting stress score
Time of inquiry
4 months postpartum	0.78 (0.40)	0.00–1.57	0.0502	1.15 (0.35)	0.47–1.82	0.0009
1 year postpartum	1.09 (0.41)	0.29–1.88	0.0076	1.24 (0.35)	0.56–1.92	0.0004
2 years postpartum	0.88 (0.43)	0.05–1.71	0.0387	1.35 (0.38)	0.61–2.08	0.0003
Pregnancy intention x time of inquiry^§			0.8987			0.9955
Overall pregnancy intention	0.85 (0.21)	0.44–1.27	<0.0001	1.16 (0.30)	0.58–1.74	<0.0001

^§The interaction between pregnancy intention and time of inquiry. PSM: propensity score matching; IPTW: inverse probability of treatment weighted; CI: confidence interval.

ISSN: 1471-2393