Table 2: Demographic data and incidence of unilateral block.

Parameters Group A
(n = 70)
Mean ± SD
Group B
(n = 70)
Mean ± SD
P- value
Age (years) 26.6 ± 7.1 27.4 ± 7.4 P = 0.515
Weight (kg) 74.4 ± 11.0 71.8 ± 18.8 P = 0.304
Height (cm) 163.8 ± 5.8 164.5 ± 2.3 P = 0.349
Gestational age (wks.) 38.9 ± 5.8 37.3 ± 9.3 P = 0.224
Cervical' dilatation (cm) 3.2 ± 1.8 3.45 ± 1.8 P = 0.412
Labor” duration (min) 360 ± 180 310 ± 151 P = 0.077
VAS1
0
30 min
6.8 ± 2.2
1.6 ± 2.2
6.2 ± 2.4
2.4 ± 2.3*
P = 0.125
P = 0.037
Unilateral block (%) 5 (7.1%) 15 (21.4%)* P = 0.029
Number of repeat injections
of bupivacaine
5 (7.1%) 4 (5.7%) P = 0.828
Number of usage of fentanyl 5 (7.1%) 15 (21.4%)* P = 0.029

'At the time of epidural insertion.
“From epidural insertion to delivery.
1Visual analogue scales.
*P< 0.05.