Prospective Study
Copyright ©The Author(s) 2023.
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 (°) 99.3781-122.2101.77 ± 6.1299.29 ± 6.4899.18 ± 5.2895.62 ± 5.420.000
1st stage of labor (h)---5.93 ± 3.536.23 ± 3.37--
2nd stage of labor (h)---0.48 ± 0.310.52 ± 0.40--
Age (yr)30.2221-4130.67 ± 3.0629.76 ± 2.9730.33 ± 2.8730.88 ± 3.380.059
Height (meters)1.631.50-1.781.63 ± 0.041.64 ± 0.051.62 ± 0.041.62 ± 0.050.091
Gestational age at delivery (wk)39.4036-4139.35 ± 1.1039.31 ± 0.9739.73 ± 1.1639.67 ± 0.970.173
BMI (kg/m2)27.1419-3827.91 ± 3.4526.51 ± 2.7626.61 ± 2.5727.99 ± 2.560.001
Weight gain (kg)14.05 ± 6.219-5214.37 ± 5.2113.10 ± 4.1212.60 ± 3.0714.43 ± 4.590.084
Birth weight (g)3426.132500-45003496.95 ± 394.843336.86 ± 344.733522.67 ± 336.993560.41 ± 410.540.000
Table 2 Effects of the subpubic arch angle and other factors on the ability to deliver vaginally
PredictorsOdds 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
PredictorsB (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
PredictorsB (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