We report our findings in a prospective, randomised study of patient r
ecall of verbal versus written preoperative warnings. There were 132 p
atients in the verbal group and 137 in the written group, with a simil
ar age and sex distribution in both groups. Four of the seven preopera
tive warnings were remembered significantly better by the group receiv
ing the written warnings (P < 0.001-0.05). However, the mean number of
warnings recalled was fewer than 3 in the verbal group, and fewer tha
n 4 (P = 0.0057) in the written group (Mann-Whitney U-test). Patients
given verbal warnings were less able to recall them than those receivi
ng written warnings. The inference is that they entered into surgery l
ess well informed.