Table 2: The comparison of NRS mean in different time between two groups and mean postoperative analgesic consumption in two groups over 24 hours.

VariablesMagnesium sulfate*Normal saline*Mean difference**P value
( = 20)( = 20)(95% CI)

Pain severity based on (NRS)
Emergence time 4.30 ± 2.543.70 ± 0.730.60 (−0.59, 1.80)0.102
6 h6.45 ± 1.059.80 ± 0.62−3.35 (−3.90, −2.80)0.0001
12 h5.90 ± 0.797.80 ± 1.11−1.90 (−2.51, −1.29)0.0001
24 h4.60 ± 0.945.90 ± 0.45−1.30 (−1.78, −0.82)0.0001
Pethidine consumption (mg)16.75 ± 18.2368.0 ± 17.42−51.25 (−62.67, −39.83)0.0001

Data are mean ± SD.
Difference between magnesium sulfate NRS mean and saline NRS mean and 95% confidence interval of calculated mean difference.