Diagnosis during hosp: none

Major cerebral anomaly = Including evidence of parenchymal haemorrhage as determined by ultrasound, ventricular dilatation (defined as >97th centile for gestational age) or the presence of porencephalic cysts or cystic leukomalacia

Meconium aspiration syndrome = The presence of meconium stained amniotic fluid at birth and severe respiratory distress within 1 hour of birth and compatible x-ray changes

Necrotising Enterocolitis = Infants with abdominal distension, blood in stools together with abdominal x-ray showing bowel oedema, pneumatosis or pneumoperitoneum, Bell stag 2 or 3

Pulmonary haemorrhage = Copious bloody secretions with clinical deterioration requiring changes in ventilatory management

Pulmonary hypertension = Severe hypoxaemia disproportionate to the severity of lung disease, evidence of a right to left shunt and other findings suggesting PHT in echocardiography and the need for medication