Assessment and Minimization of Preoperative Fear of the Unknown Using a VR Experience of the Theatre Suite; a Randomized Control Trial

The study objective is to determine whether exposure to the operating theatre suite via virtual reality (VR) for patients undergoing gynecologic-oncological surgery reduces pre-operative anxiety.

After patients are recruited, their anxiety level is measured by a simple 6-item visual anxiety scale (T0). Patients are then randomized into either receiving care-as-usual (CAU), or CAU combined with a VR experience (~3.5 minutes; with background music and narration) where they are familiarized with the environment they will encounter during their stay for their cancer operation. Anxiety is measured again (T1). Days/weeks later, when patients are back in the hospital for their surgery (T2), anxiety is measured again in the preanesthetic bay, before receiving any anesthetics. Personnel collecting the anxiety scale at T2 will be unaware whether a patient had received the VR intervention or not.

Randomization will be performed by a person unrelated to the study by using a computerized randomization tool to generate an allocation list and inserting paper slips with the group allocation into consecutively numbered, opaque envelopes which are opened, in order, at the time of randomization.

Using a two-sided Wilcoxon-Mann-Whitney test and targeting a power of 80% at a significance level α of 0.05, abd assuming a clinically relevant difference in the anxiety scale of at least one "face" (i.e. at least 1 point on the 6-item scale) between the two groups and a within-group standard deviation of 1.6 (effect size: 0.625), sample size was determined as 34 patients per group for a 1:1 group allocation. Assuming a drop out/lost-to-follow up rate of up to 15%, 80 patients (40 per group) are to be recruited.

Descriptive statistic analysis will be performed. Within-group and between-group assessements will be done using Wilcoxon signed rank test and the Mann-Whitney rank sum test, respectively.