Effect of maternal stress during pregnancy on the risk for preterm birth

Table 3 Obstetric variables

	Index group		Control group
	N	%	N	%	P-value**
SSRI use during pregnancy					0.183
Yes	10	7	5	3.1
No	132	93	156	96.9
Twin pregnancy					<0.000
Yes	24	15	0	0
No	136	85	165	100
Amniotic fluid pathology					0.034
Normal	132	91.7	157	98.1
Polyhydramnios	5	3.5	1	0.6
Oligohydramnios	7	4.9	2	1.3
Genital tract infection					<0.000
Yes	36	24.8	13	8.1
No	109	75.2	147	91.9
Premature contractions					<0.000
Yes	60	40.3	24	15
No	89	59.7	136	85
Cervical changes					<0.000
Yes	21	14.2	4	2.5
No	127	85.8	156	97.5
Vaginal bleeding					<0.000
Yes	59	40	15	9
No	89	60	144	91
Anemia					0.601
Yes	8	6	7	4
No	126	94	152	96
PPROM					<0.000
Yes	94	59.5	1	0.6
No	64	40.5	164	99.4
SGA					<0.000
Yes	24	15.3	4	2.4
No	133	84.7	165	97.6
Congenital defects					0.279
Yes	9	5.7	5	3
No	149	94.3	164	97
Placental abruption					0.003
Yes	8	5	0	0
No	151	95	168	100
Preeclampsia					<0.000
Yes	14	8.8	5	3
No	145	91.2	163	97
Maternal stress during pregnancy					<0.000
Yes	58	42.3	32	20
No	79	57.7	128	80
Onset of labor					0.005
Spontaneous	123	76.9	150	88.8
Induced	37	23.1	19	11.2
Mode of delivery					<0.000
Vaginal	98	61.6	143	84.6
Vacuum extraction	8	5	13	7.7
Cesarean section	53	33.3	13	7.7
	Mean	SD	Mean	SD	p*
Gestational week at birth	33.06	3.84	40.03	1.2	<0.000

ISSN: 1471-2393