Statistical analyses
The primary analysis was by intention to treat, with a secondary analysis consistent with the main paper as per-protocol. Post hocanalyses were conducted of maternal and neonatal cost subgroups and after exclusion of outliers. The economic perspective taken is that of the Australian public hospital system with total costs incurred by the hospital. Differences in costs between the two arms are presented with 95% confidence intervals and evidence was considered statistically significant if two-tailed P-values were < 0.05. All analyses were conducted using [Stata/MP version 17.0] (13).