Statistical Analysis
pain
The primary end point was to measure the intensity of pain in each group using the VAS and to demonstrate a 1.5-point reduction in pain in the VR group. We enrolled 120 patients to validate this hypothesis with an SD of 2.5, power of 90%, and type I error rate of 5%. We included 6 more patients, considering that 5% could not be evaluated using 2-tailed tests. Intention-to-treat analysis included patients for whom pain assessment was available.Variables are presented in tables; the Student All statistical analyses were conducted using SAS 9.3 software (SAS Institute Inc) with a significance of 5%.