Mizuno 1999.

Methods	Cross‐over RCT of prone and supine positions
Participants	Included: 7 very low birthweight infants with radiographic and clinical evidence of chronic lung disease, requiring ventilatory support and a feeding volume of more than 100 ml a day Excluded: not stated Mean gestational age: 26.6 weeks; mean birth weight: 845 g; mean age: 57.4 days; mean weight: 1018 g; mean FiO2: 0.24 Setting: not stated
Interventions	The infant was settled into position for at least 1 hour before being fed nasogastrically over 1 hour
Outcomes	SaO2; tcPCO2; tidal volume; minute ventilation; spontaneous respiratory rate; pulmonary resistance Measured 10 minutes before and during feeding (20 minutes, 40 minutes and end of feeding) when infants were quiet and awake
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not stated
Allocation concealment (selection bias)	Unclear risk	Not stated
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not stated
Incomplete outcome data (attrition bias) All outcomes	Low risk	Appears to be no loss to follow‐up