From: Comparison of fentanyl versus meperidine as supplements to epidural clonidine-bupivacaine in patients with lower limb orthopedic surgery under combined spinal epidural anesthesia
Intra-operative sedation score
Fentanyl group (n = 45)
Meperidine group (n = 45)
Clonidine group (n = 45)
Chi-square
X 2
P-value
Grade 0
4
5
0.981
0.986
Grade 1
19
17
18
Grade 2
14
15
12
Grade 3
7
8