|
Patients’ characteristics
|
|
Age* (years)
|
32.5 ± 3.0
|
30.4 ± 4.4
|
0.02
|
|
Body mass index*(kg/m2)
|
26.9 ± 3.5
|
28.6 ± 4.4
|
0.01
|
|
Gestational diabetes (%)
|
6
|
7
|
0.6
|
|
Obstetrical data
|
|
Weeks of pregnancy*
|
39.1 ± 1.3
|
39.4 ± 1.3
|
0.62
|
|
Birth weight (g)*
|
3428.8 ± 397.8
|
3378.3 ± 426.6
|
0.5
|
|
Instrumental delivery (%)
|
51
|
54
|
0.5
|
|
- Forceps (%)
|
9.7
|
1.8
|
0.04
|
|
- Fetal distress a (%)
|
43.7
|
48.3
|
0.4
|
|
Non-occiput anterior presentation (%)
|
16
|
17
|
0.6
|
|
2nd stage of labor (min)*
|
104.3 ± 62.8
|
98.9 ± 76.0
|
0.5
|
|
Episiotomy (%)
|
45
|
49
|
0.4
|
|
Nulliparous at delivery (%)
|
67
|
54
|
0.1
|
|
Induced labor (%)
|
22
|
24
|
0.5
|
|
Oxytocin during 2nd stage of labor (%)
|
67
|
66
|
0.5
|
|
Epidural anaesthesia (%)
|
58
|
66
|
0.2
|
|
Estimated blood loss (ml)*
|
498.3 (166.7)
|
548.2 ± 402.6
|
0.2
|
|
Male infant (%)
|
61
|
52
|
0.3
|
|
Degree of OASI (%)
|
|
3a
|
38
|
54
|
0.3
|
|
3b
|
45
|
33
|
0.4
|
|
3c
|
10
|
7
|
0.7
|
|
4
|
7
|
6
|
0.6
|
|
Follow-up assessment
|
|
Follow-up interval in weeks*
|
27.1 ± 2.5
|
28.5 ± 48.1
|
0.6
|
|
IAS-width (mm)*
|
1.5 ± 0.4
|
1.5 ± 0.5
|
0.8
|
|
EAS-width (mm)*
|
5.0 ± 1.7
|
5.5 ± 2.1
|
0.3
|
|
Perineum length (cm) *
|
2.3 ± 0.6
|
2.2 ± 0.7
|
0.5
|
|
Pelvic floor strength (Oxford scale)*
|
2.0 ± 0.6
|
2.1 ± 0.8
|
0.5
|
|
Kelly-Holschneider Score *
|
18.2 ± 1.5
|
19.9 ± 1.1
|
0.2
|
