Prespecified subgroup analyses were performed
with stratification on the basis of the grade of
abnormality on amplitude-integrated electroencephalography
at randomization and duration of
the interval between birth and randomization (0 to
<4 hours vs. 4 to 6 hours). The consistency of the
effect of the treatment group across subgroups
was explored by means of the statistical test of
interaction.
การแปล กรุณารอสักครู่..
