Are 6 more accurate than 4? The influence of different modes of delivery on postpartum depression and PTSD

Table 3 EPDS- hierarchical multiple regression analyses

model	predictors	EPDS
model	predictors	β	t	R²adj
step 1				.031**
	age	− .064*	-2.184
	educational level
	medium	.132**	4.528
	low	.105**	3.632
step 2				.122**
	age	− .048	-1.684
	educational level
	medium	.109**	3.927
	low	.068*	2.443
	psychological treatment before childbirth	− .130**	-4.783
	fear of childbirth	.204**	7.648
	planning of pregnancy	.058*	2.084
	lack of social support after childbirth	.130**	-4.783
step 3				.135**
	age	− .052	-1.815
	educational level
	medium	.103**	3.708
	low	.065*	2.346
	psychological treatment before childbirth	− .127**	-4.675
	fear of childbirth	.198**	7.290
	planning of pregnancy	.057*	2.045
	lack of social support after childbirth	.132**	4.912
	delivery mode***
	AVD	− .013	-0.471
	Grade 4	− .020	-0.730
	Grade 3	.003	0.121
	Grade 2	− .017	-0.616
	Grade 1	.121**	4.409
ΔR² from step 1 to step 2			.093**
ΔR² from step 2 to step 3			.016*

The explained variances are reported as adjusted R²
**p < .01, *p < .05: significance of increase in explained variance and significance of beta weights
***delivery mode: AVD = assisted vaginal delivery (involving the use of vacuum or forceps to guide the infant out of the birth canal), Grade 4 = caesarean section (CS) on maternal request, Grade 3 = medically indicated CS, Grade 2 = secondary CS, Grade 1 = emergency CS

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