Table 2. Primary and Secondary Outcomes.

Table 2. Primary and Secondary Outcomes.*


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Outcome
Patients w/ Labor Analgesia (n=68)
Patients w/ Labor Analgesia (n=71)
P Value
Caesarean – n (%)
5 (7.3)
45 (63.4)
< 0.0001
Length of labor – hr†(Vaginal deliveries only)
9.0 ± 4.0
8.9 ± 4.5
0.83
Duration of first stage – min
409 ± 56
411 ± 52
0.72
Duration of second stage – min
59 ± 10
56 ± 9
0.83
Average VAS pain ratings (0 – 100 mm) ‡
 
     First stage of labor
< 0.001
        Median
25
98
 
        Interquartile interval
16 – 45
81 – 100
     Second stage of labor
< 0.001
        Median
20
85
 
        Interquartile interval
15 – 37
76 – 97
 
Use of oxytocin after analgesia – n (%)
7 (10.2)
32 (45.1)
< 0.01
Maternal overall satisfaction (VAS, 1 – 100mm) §
< 0.01
     Median
88
22
 
     Interquartile interval
76 – 97
11 – 305
Infant weight – g
3,300 ± 340
3,400 ± 350
0.83
1 – min Apgar < 7 – n (%)
4 (5.8)
5 (7.0)
0.69
5 – min Apgar < 7 – n (%)
0
0
* Plus-minus values are means ± standard deviation (SD). P values were calculated with Student t test or the Chi-square test, as appropriate.
† The length of labor indicates the time period from the onset of regular uterine contraction to the 1 hr after delivery of placenta.
‡ The VAS system of pain is a 0 to 100 mm linear gauge in which 0 = no pain, 100 = worst pain imaginable.
§ The VAS system of satisfaction with analgesia is a 1 to 100 mm linear gauge in which 1 = dissatisfaction, 100 = fully satisfied.