O-006 Follow – Up Outcomes From The Boost-ii Uk Trial Of Oxygen Saturation Targeting In Preterm Infants
2014
Background and aims The optimal target range for pulse oximeter saturation (SpO 2 ) in extremely preterm infants is unknown. BOOST-II UK is one of 5 international studies that have recently investigated this. Methods Preterm infants born before 28 weeks’ gestation were randomised within 24 h of birth to an SpO 2 target range of 85–89% or 91–95%. The intervention used masked offset oximeters and was continued until 36 weeks’ gestation. The primary outcome was a composite of death or serious neurosensory disability (SND) in survivors at age 2 corrected for prematurity, evaluated in 745 infants cared for using updated trial oximeters. A sensitivity analysis restricted to infants assessed by a Bayley III examination and a secondary analysis including a further 228 infants who were studied before the oximeters were updated were also performed. Results The primary outcome was determined for 722 (96.9%) of infants. The sensitivity analysis showed similar results. In the secondary analysis the mortality difference was 4.9% (p = 0.05). Severe visual loss did not differ between groups. Conclusions The higher SpO 2 target group had 8.5% greater survival with no increase in serious neurosensory disability. For infants born before 28 weeks’’ gestation, SpO 2 targets below 90% are not recommended.
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