|
Sphincter rupture |
Sphincter rupture |
All vaginal births |
Crude |
Crude |
Adjusted (maternal characteristics) |
Adjusted (maternal
characteristics) |
Adjusted (delivery mode) |
Adjusted (delivery
mode) |
Birth weight (g) |
n |
(%) |
N |
OR |
(95%CI) |
OR |
(95%CI) |
OR |
(95%CI) |
<2500 |
231 |
(0.9) |
25 472 |
0.24 |
0.21–0.27 |
0.17 |
0.15–0.20 |
0.19 |
0.17–0.22 |
2500–2999 |
1845 |
(1.8) |
101 202 |
0.48 |
0.45–0.50 |
0.36 |
0.34–0.38 |
0.38 |
0.36–0.40 |
3000–3499 |
8641 |
(2.7) |
323 256 |
0.70 |
0.68–0.72 |
0.59 |
0.57–0.60 |
0.61 |
0.60–0.63 |
3500–3999 |
13 713 |
(3.8) |
357 012 |
1.00 |
ref |
1.00 |
Ref |
1.00 |
Ref |
4000–4499 |
7829 |
(5.2) |
149 762 |
1.36 |
1.33–1.40 |
1.65 |
1.60–1.69 |
1.56 |
1.52–1.60 |
≥4500 |
2324 |
(7.2) |
32 284 |
1.87 |
1.80–1.96 |
2.84 |
2.73–2.96 |
2.61 |
2.50–2.72 |