From: Single-dose intrathecal analgesia: a safe and effective method of labor analgesia for parturients in low resource areas
Second stage
Group S (n = 45)
Percentage
Group C (n = 44)
Duration (min)
sP
sM
cP
cM
< 30
1
2
4
0
30–60
18
14
40
31
15
41
34
> 60–90
6
3
13
7
16
> 90–120
5
> 120