Impact of a personalized intervention on preoperative anxiety and determination of the minimal clinically important difference in anxiety levels – a randomized clinical trial.

Preoperative anxiety is common and most patients experiencing preoperative anxiety would welcome support to cope with their anxiety. Studies examining the effectiveness of information to reduce anxiety have been inconsistent. In addition, it is unclear whether results reported to be statistically significant are also clinically relevant. This study's primary objective was to test the hypothesis that a personalized and information-based intervention would reduce anesthesia-related anxiety.