Table 1. Baseline Characteristics of the Subjects.

Table 1. Baseline Characteristics of the Subjects.*


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Characteristic
Patients w/ Labor Analgesia (n=68)
Patients w/ Labor Analgesia (n=71)
P Value
Age at delivery – year
25.5 ± 3.2
25.0 ± 5.6
0.97
Weight – kg
74 ± 11
77 ± 17
0.91
Height – cm
163 ± 5
159 ± 9
0.88
Gestational age of fetus – week
   Median
39
38
0.85
   Interquartile interval
38 – 41
37 – 40
Current smoker – n (%)
22 (14.6)
24 (17.0)
0.51
Spontaneous ROM > 12 hrs before oxytocin infusion – n (%)
31 (20.5)
36 (25.5)
0.18
Use of oxytocin prior to analgesia – n (%)
23 (15.2)
27 (19.1)
0.33
Reasons for oxytocin
Induction of labour after prelabour ROM – n (%)
14 (60.9)
18 (66.7)
0.96
Augmentation of labour – n (%)
7 (30.4)
5 (18.5)
0.72
Maternal request – n (%)
2 (8.7)
4 (14.8)
0.92
Pain ratings before analgesia with VAS†
Median
63
85
0.17
   Interquartile interval
52 – 77
67 – 90
Vital signs prior to analgesia
Blood pressure
   Systolic pressure – mmHg
116 ± 13
120 ± 13
0.76
   Diastolic pressure – mmHg
65 ± 7
68 ± 8
0.41
Heart rate – beats per minute
72 ± 10
71 ± 5
0.62
Respiratory rate – breaths per minute
22 ± 7
19 ± 8
0.84
Oral temperature – ℃
37.3 ± 0.1
36.9 ± 0.4
0.16
* Plus-minus values indicate the means ± standard deviation (SD). P values were calculated with ANOVA or the Chi-square test, as appropriate.
† The Visual Analog Scale (VAS) ratings of pain intensity is a 100-point linear gauge in which 0 = no pain, 100 = worst pain imaginable.
ROM: rupture of membranes.