Fig. 2. Upper dermatome blocked to light touch sensation at 10 and 20 min postspinal for the phenylephrine group ( cross-hatched bars ) and the ephedrine group (open bars ). Data are expressed as median (interquartile range). There was a difference between the groups at 10 min (P = 0.026) and at 20 min postspinal (P = 0.009) (Mann–Whitney U test).