Respiratory symptoms in preterm infants: burden of disease in the first year of life

Table 1 Characteristics of the study population of preterm infants (n = 126).

Characteristics	n	% ^a
Bronchopulmonary dysplasia (BPD)	78	62
mild BPD	28	36
moderate BPD	36	46
severe BPD	14	18
Gestational age in weeks (median/range)	28.71	23.9 - 36.1
Male sex	71	56
Birthweight in g (median/range)	1070	420-2980
Chorioamnionitis	42	37
Patent ductus arteriosus	29	23
Prenatal steroids	102	81
surfactant therapy	48	38
Mechanical ventilation	66	52
Days of mech. ventilation (median/range)	1	0-63
CPAP ^b	113	90
Days on oxygen therapy (median/range)	42	0-385
Days of initial hospital stay (median/range)	70	7-141
Contact to other children ^c	75	61
Maternal smoking in pregnancy ^d	13	10
Maternal atopy ^e	20	16

^a Data are given as number (percentage) if not indicated otherwise.
^b CPAP = continuous positive airway pressure breathing support
^c Contact to other children = having siblings or going to a nursery care institution regularly
^d Assessed by parental questionnaire
^e Maternal atopy = mother has asthma and/or allergic rhinitis and/or atopic dermatitis

ISSN: 2047-783X