Objective: To explore international variations in the management and survival of extremely low gestational age and birth-weight births.
Design
Results:The percentage of births recorded as live born was consistently low at 22 weeks and consistently high at 25 weeks but varied internationally at 23 weeks for those weighing 500g and over (range 33%-70%) and at 24 weeks for those under 500g (range 5%-71%). Antenatal steroids and provision of respiratory support at 22 to 24 weeks gestation varied between countries, but were consistently high for babies born at 25 weeks. Survival to discharge was universally poor at 22 weeks gestation (0%) and at any gestation with birthweight below 500g, irrespective of treatment provision. In contrast, births at 23 and 24 weeks weighing 500g and over showed significant international variation in survival (23 weeks: range: 0%-25%; 24 weeks range: 21%-50%), reflecting levels of treatment provision.
Conclusion:Wide international variation exists in the management and survival of extremely preterm births at 22 to 24 weeks gestation. Universally poor outcomes for babies at 22 weeks and for those weighing under 500g suggest little impact of intervention and support the inclusion of birth-weight along with gestational age in ethical decision-making guidelines.