Magnesium group
(n=30)
Control group
(n=30)
Age (y)
(Mean ±SD) 
Range
39.55 ± 12.23 22 - 56 35.50 ± 9.06 22 - 50
Weight (kg)
(Mean ±SD) 
Range
74.65 ± 8.02 60  - 95 72.50 ± 7.97 65 - 90
Sex #
(male/female)
19 / 11  21/ 9
Surgical diagnosis #
- Craniotomy
- Spine surgery
  11
19
  13
17
• Comparison between the two groups by unpaired t-test.
• (#) Comparison by Chi square test.
• (*) Significant (P < 0.05)
Table 1: Patients' characters.