Baseline variables (study phase 3)Group SGroup PP values†*
MedianIQRMedianIQR
Age295.52630.09
Experience in anaesthesia (in months)1771860.92
Total number of epidurals performed prior to recruitment1617.510130.29
Total number of spinal anaesthetics performed prior to recruitment403030500.92
Most recent epidural performed prior to recruitment (days)77770.76
  • *All parametric data were summarised as mean and SD. All non-parametric data were summarised as median and IQR.

  • †Mann-Whitney U test.