Statistical analysis
Based on the preliminary trial, it was observed that approximately 70 per cent of patients developed TH during knee arthroscopy after 10 ml of 0.9 per cent normal saline was given. A 30 per cent decline in the occurrence of TH was considered clinically significant; hence, 43 patients were required per group with an alpha level of 0.05 and power of 90 per cent. Considering a 20 per cent dropout, the aim was to enrol 108 patients.Categorical data are presented as number (percentage) and were analysed by the chi-square test or Fisher’s exact test. The independent 