Among all randomized patients, 98Æ2% received primary
cemented knee prosthesis, while the rest (1Æ2%) underwent
revision of prosthesis. Regarding the type of anaesthesia,
93Æ9% were administered spinal anaesthesia and 6Æ1%
general anaesthesia. The mean duration of surgery was
131Æ80 (SD 33Æ3) minutes, with no statistically significant
differences between the two comparator groups (P = 0Æ995).