Liang ZW, Gao WL. Predictive value of the trans-perineal three-dimensional ultrasound measurement of the pubic arch angle for vaginal delivery. World J Clin Cases 2023; 11(20): 4874-4882 [PMID: 37583997 DOI: 10.12998/wjcc.v11.i20.4874]
Corresponding Author of This Article
Wan-Li Gao, BMed, Professor, Department of Obstetrics and Gynecology, Beijing Tiantan Hospital, No. 119 South Fourth Ring West Road, Fengtai District, Beijing 100070, China. gaolisa2004@mail.ccmu.edu.cn
Research Domain of This Article
Obstetrics & Gynecology
Article-Type of This Article
Prospective Study
Open-Access Policy of This Article
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World J Clin Cases. Jul 16, 2023; 11(20): 4874-4882 Published online Jul 16, 2023. doi: 10.12998/wjcc.v11.i20.4874
Table 1 General information (mean ± SD) on the sample population and differences among delivery groups
Characteristic
Sample
Mode of delivery
P value
M
Range
Pre-labor CS (n = 82)
Normal vaginal delivery (n = 155)
Forceps delivery (n = 15)
CS in labor (n = 49)
SPAA (°)
99.37
81-122.2
101.77 ± 6.12
99.29 ± 6.48
99.18 ± 5.28
95.62 ± 5.42
0.000
1st stage of labor (h)
-
-
-
5.93 ± 3.53
6.23 ± 3.37
-
-
2nd stage of labor (h)
-
-
-
0.48 ± 0.31
0.52 ± 0.40
-
-
Age (yr)
30.22
21-41
30.67 ± 3.06
29.76 ± 2.97
30.33 ± 2.87
30.88 ± 3.38
0.059
Height (meters)
1.63
1.50-1.78
1.63 ± 0.04
1.64 ± 0.05
1.62 ± 0.04
1.62 ± 0.05
0.091
Gestational age at delivery (wk)
39.40
36-41
39.35 ± 1.10
39.31 ± 0.97
39.73 ± 1.16
39.67 ± 0.97
0.173
BMI (kg/m2)
27.14
19-38
27.91 ± 3.45
26.51 ± 2.76
26.61 ± 2.57
27.99 ± 2.56
0.001
Weight gain (kg)
14.05 ± 6.21
9-52
14.37 ± 5.21
13.10 ± 4.12
12.60 ± 3.07
14.43 ± 4.59
0.084
Birth weight (g)
3426.13
2500-4500
3496.95 ± 394.84
3336.86 ± 344.73
3522.67 ± 336.99
3560.41 ± 410.54
0.000
Table 2 Effects of the subpubic arch angle and other factors on the ability to deliver vaginally
Predictors
Odds ratio (95%CI)
P value
Age (yr)
1.13 (1.00–1.27)
0.042
Height (meters)
0.00 (0.00–0.41)
0.026
Gestational age at delivery (wk)
1.27 (0.87–1.84)
0.214
BMI (kg/m2)
1.11 (0.97–1.26)
0.130
Weight gain (kg)
1.05 (0.97–1.14)
0.256
Birth weight (g)
1.00 (1.001–1.003)
0.000
SPAA (°)
0.90 (0.84–0.95)
0.000
Table 3 Predictive effect of the subpubic arch angle with respect to the duration of the first stage of vaginal delivery and other factors
Predictors
B (95%CI)
P value
Age (yr)
-0.02 (-0.21 to 0.16)
0.789
Height (meters)
-0.09 (-17.39 to 4.62)
0.254
Gestational age at delivery (wk)
0.02 (-0.50 to 0.66)
0.785
BMI (kg/m2)
-0.03 (-0.25 to 0.18)
0.758
Weight gain (kg)
-0.19 (-0.31 to 0.02)
0.025
Birth weight (g)
0.13 (0.000 to 0.003)
0.135
SPAA (°)
0.06 (-0.05 to 0.12)
0.459
Table 4 Predictive effect of the subpubic arch angle with respect to the second stage of labor in the normal vaginal delivery group
Predictors
B (95%CI)
P value
Age (yr)
0.17 (0.002 to 0.071)
0.039
Height (meters)
-0.18 (-4.63 to -0.55)
0.013
Gestational age at delivery (wk)
0.02 (-0.10 to 0.13)
0.853
BMI (kg/m2)
-0.11 (-0.074 to 0.005)
0.087
Weight gain (kg)
0.02 (-0.02 to 0.03)
0.765
Birth weight (g)
0.09 (0.000 to 0.001)
0.316
SPAA (°)
0.13 (-0.001 to 0.03)
0.045
Citation: Liang ZW, Gao WL. Predictive value of the trans-perineal three-dimensional ultrasound measurement of the pubic arch angle for vaginal delivery. World J Clin Cases 2023; 11(20): 4874-4882