Subgroup analyses of primary outcomes by birthweight, gestational age, multiple
pregnancy, mode of delivery and size for gestational age
* 26 infants in the intervention and 18 infants in the control group have their
gestational age at birth missing. Size for gestational age could not be calculated for one
additional infant that was born with indeterminate sex.
¥ adjusted by site and clustering due to multiple births. For the
subgroup analysis by site, adjustment was only done for clustering due to multiple
births.
**The widths of the confidence intervals were not adjusted for multiplicity, so
the intervals should not be used to infer definitive intervention effects. The size of
squares representing the point estimates is proportional to the weight assigned to the
subgroup.