Baseline variables (study phase 3)Group SGroup PP values†*
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.