Table 4. Logistic regression model for Perceived Stress Scale (PSS, cut-off > 26).

Variables in the model	OR^a	95%CI
Migrant^b	0.708	0.216–2.322
Maternal education
1-4 years	-	-
5-6 years	0.408	0.035–4.732
7-9 years	0.232	0.022–2.415
10-12 years	0.062	0.005–0.792
Higher education	0.071	0.004–1.420
Family income^b (€)
< 500	-	-
500-1,000	3.353	0.840–13.378
1,001-1,500	0.553	0.109–2.798
1,501-2,000	2.281	0.289–18.034
> 2,000	-	-
Parity^b (multiparous)	2.409	0.600–9.672
Marital Status^b (living with partner)	0.531	0.174–1.616
Adverse obstetric outcomes (previous pregnancies)	8.802	1.911–40.530
Depression^b (previous to pregnancy)	0.754	0.158–3.597
Anaemia (previous to pregnancy)	8.383	1.633–43.024
Infant with low birth weight	7.643	1.953–29.919
Smoking in pregnancy^c
Non-smoker	-	-
≤ 10	0.021	0.001–0.293
> 10	3.172	0.316–31.860
Delivery mode^b
Normal	-	-
Instrumented	0.671	0.118–3.817
Caesarean section	0.518	0.107–2.505
Infant with malformations^b	5.653	0.614–52.036
Gestational hypertension	5.216	1.160–23.443
Gestational diabetes^b	2.194	0.459–10.491
Episiotomy (only vaginal delivery)	18.820	3.953–89.609

^a odds ratio adjusted for all variables included (that met the inclusion criterion p > 0.2). Variables removed: “preeclampsia”.

^b absent from predictive model.

^c mean of cigarettes/day.

Significant values are presented in bold.