Group D
(n=31)
Group P
(n=31)
Significance
Time to T8 (min)     Z=4.615
P<0.0001*
Min-Max 6-10 6-14
Mean ± SD 7.7 ± 1.5 10.6 ± 2.4
2 segment regression (min)     t=9.208
P<0.0001*
Min-Max 90-140 80-110
Mean ± SD 120.3 ± 13.8 92.3 ± 9.9
Time to bromage 3 (min)     Z=4.854
P<0.0001*
Min-Max 6-10 8-12
Mean ± SD 7.9 ± 1.5 10.3 ± 1.6
t: t-test Z: Mann Whitney test *Significant at P ≤ 0.05
Table 2: Block characteristics among the studied groups.