Table 2.
Maternal and perinatal characteristics by mode of delivery in a population-based cohort of singleton pregnancies starting with labour and ending at term
| |
Spontaneous vaginal |
Emergency CS |
Vacuum extraction |
|---|---|---|---|
| N = 1,010,229 | N = 851,347 | N = 75,216 | N = 87,150 |
| |
% |
% |
% |
|
Maternal age (years) |
|
|
|
| -19 |
1.9 |
1.1 |
1.6 |
| 20-24 |
13.6 |
10.1 |
13.5 |
| 25-29 |
31.2 |
28.1 |
32.8 |
| 30-34 |
34.6 |
36.1 |
34.8 |
| 35-39 |
15.6 |
19.4 |
14.4 |
| >39 |
2.8 |
4.7 |
2.6 |
| Missing |
0.3 |
0.4 |
0.3 |
|
Maternal height (cm) |
|
|
|
| -155 |
3.6 |
8.1 |
4.7 |
| 156-160 |
12.8 |
19.4 |
15.2 |
| 161-165 |
24.7 |
27.1 |
26.1 |
| 166-170 |
28.5 |
23.9 |
26.9 |
| >170 |
24.5 |
15.0 |
20.9 |
| Missing |
6.0 |
6.4 |
6.1 |
|
Maternal BMI |
|
|
|
| Underweight |
1.5 |
0.9 |
1.6 |
| Normal |
36.6 |
30.3 |
38.1 |
| Overweight |
14.3 |
17.6 |
14.2 |
| Obese |
5.8 |
10.0 |
5.0 |
| Missing |
41.8 |
41.2 |
41.1 |
|
Parity |
|
|
|
| Multipara |
60.7 |
35.3 |
20.8 |
| Primipara |
39.3 |
64.7 |
79.2 |
|
Indication |
|
|
|
| Signs of fetal distress |
1.1 |
29.7 |
34.9 |
| Prolonged labour |
6.4 |
32.9 |
38.3 |
| Both |
0.2 |
8.3 |
10.8 |
| None of these |
92.3 |
29.2 |
16.1 |
|
Gestational week |
|
|
|
| 37-38 |
16.3 |
16.8 |
11.4 |
| 39-41 |
77.1 |
64.3 |
75.8 |
| 42-45 |
6.6 |
18.9 |
12.8 |
|
Infant birthweight (g) |
|
|
|
| ≤3000 |
9.5 |
11.1 |
9.2 |
| 3001-3500 |
32.9 |
25.5 |
30.9 |
| 3501-4000 |
37.7 |
33.0 |
37.7 |
| 4001-4500 |
16.1 |
21.6 |
17.9 |
| >4500 gram |
3.6 |
8.6 |
4.1 |
| Missing | 0.2 | 0.3 | 0.2 |