Results
anxiety
A total of 67 patients scheduled for TKA were assessed for eligibility, and seven were excluded (five due to spinal block failure and two for refusal of sedation). The remaining 60 patients were assigned to one of the three groups and completed the study (Figure Table Patient characteristics and the variables assessed in the first session did not differ significantly among the three groups. Figure The primary outcome was the identification of power of BW at four frequency intervals (BW 1-4) directly related to anxiety (STAI-S score), rather than comparing groups and sessions. All data were first merged for descriptive statistics: 60 patients, three sessions per patient, for a total of 180 data points (Table 