Heaf 1983.

Methods	Cross‐over RCT of supine and lateral good‐lung dependent, or lateral good‐lung uppermost positions
Participants	Included: 10 infants with unilateral lung disease Excluded: not stated Mean age: 45 days; mean weight: 3240 g; mean FiO2: 0.33; ventilation: intubated 5, mechanically ventilated 3; diagnosis: post‐diaphragmatic hernia repair 8, hypoplastic right lung 1, atelectasis of the right lung 1 Setting: UK
Interventions	Only the order of the lateral positions were randomly allocated; both lateral positions were preceded by supine positioning; infants remained in each position for 10 minutes
Outcomes	tcO2; tcCO2 Recorded over the 10 minutes in each position
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