GENDER – male; Adequacy – small for gestational age ; Hypertension –
maternal systemic arterial hypertension; Smoking – maternal smoking;
Chorio – chorioamnionitis; Antenatal_cortic – antenatal
corticosteroids; SURF – need for surfactant; RespSupp14th_0 – none
respiratory support on the 14th day of life (0); RespSupp14th_1e2 –
nasal oxygen catheter/CPAP/NIPPV (1) or MV/HFV (2) on the 14th day of
life; PDA – patent ductus arteriosus; NEC_uptothe14th – necrotizing
enterocolitis up to the 14th day of life; EARLYSEPSIS – early sepsis;
LATESEPSIS – late sepsis up to the 14th day of life; GAdays –
gestational age in days; WEIGHT_g – birth weight in grams; FiO214th –
fraction of inspired oxygen on the 14th day of life.
Table 2 – Association between antenatal and postnatal
variables and bronchopulmonary dysplasia according to its severity