Spinal anesthesia with (yes) and without (no) Clonidine: n (%)

Duration (min)

NO

yes

Total

P-value

≤90

21 (77.8)

6 (22.2)

27 (100

0.0023

]90 - 120]

12 (75)

4 (25)

16 (100)

0.0000

]120 - 150]

8 (72.7)

3 (27.3)

11 (100)

3.7141

>150

1 (16.7)

5 (83.3)

6 (100)

4.5214