Neighbourhood deprivation and very preterm birth in an English and French cohort

Table 2 Characteristics of very preterm singletons in Trent and Ile-de-France

	Very preterm infants
	Trent	Ile-de-France	p
Characteristics of very preterm population
Maternal age [mean (SD)]	27.4 (7.1)	30.3 (6.0)	(<.001)
Gestational age [mean (SD)]	28.3 (2.4)	28.2 (2.5)	(0.8)
Birthweight [mean (SD)]	1162 (407)	1116 (394.5)	(1.0)
Sex [% male]	52.8	52.0	(0.8)
Characteristics of very preterm pregnancy and delivery
Hypertension during pregnancy^a	20.6	24.9	(0.07)
Antepartum haemorrhage without hypertension	38.8	15.9	(<.001)
Premature rupture of membranes without hypertension or antepartum haemorrhage	13.3	19.7	(0.002)
Preterm labour without hypertension, haemorrhage or PPROM	10.9	14.9	(0.03)
Caesarean section before labour	40.9	44.3	(0.2)
Very preterm infant outcomes
In-hospital mortality^b	20.0	24.3	(0.06)
Bronchopulmonary dysplasia^c,d	22.0	15.8	(0.01)
Brain lesions ^c,e	7.6	11.4	(0.03)
At least one day on ventilator ^c	60.9	73.0	(<.001)
Long hospital stay^c,f	44.1	63.3	(<.001)
Breast milk at discharge^c	35.9	26.9	(0.002)

a) Hypertension during pregnancy: pregnancy-induced hypertension, pre-eclampsia, eclampsia and HELLP syndrome.
b) In-hospital mortality includes death during labour, delivery or hospitalization after birth.
c) Includes only infants discharge alive.
d) Oxygen dependence or ventilation, including nasal continuous positive airway pressure, at 36 weeks of gestational age.
e) Brain lesions includes intraventricular haemorrhage and periventricular leukomalacia.
f) Long hospital stay: longer hospital stay than 75^th percentile for gestational age.

ISSN: 1471-2393