Maternal age (years) |
31.0±4.8 |
30.2±4.8 |
30.8 ±4.8 |
<0.001 |
Maternal pre-pregnancy BMI |
24.3±4.8 |
24.1±4.4 |
24.3±4.8 |
0.01 |
Parity |
|
|
|
|
0 |
9554 (41.9%) |
1813 (36.6%) |
11367 (41.0%) |
<0.001 |
1+ |
3139 (58.1%) |
13225 (63.4%) |
16364 (59.0%) |
|
Gestational age at delivery (days) |
280.6 |
281.0 |
280.7 |
0.002 |
Start of labour |
|
|
|
|
Spontaneous |
16272 (71.4%) |
3731 (75.3%) |
20003 (72.1%) |
<0.001 |
Induced |
5152 (22.6%) |
950 (19.2%) |
6102 (22.0%) |
|
Pre-labour cesarean delivery |
1355 (5.9%) |
271 (5.5%) |
1626 (5.9%) |
|
Mode of delivery |
|
|
|
|
Spontaneous vaginal |
17069 (74.9%) |
3858 (77.9%) |
20927 (75.5%) |
<0.001 |
Operative vaginal |
2443 (10.7%) |
432 (8.7%) |
2875 (10.4%) |
|
Cesarean |
3267 (14.3%) |
662 (13.4) |
3929 (14.2%) |
|
Birthweight (g) |
3583±483 |
3589±464 |
3584±479 |
0.38 |
5 min Apgar score < 7 |
260 (1.1%) |
51 (1.0%) |
311 (1.1%) |
0.55 |
Transfer to NICU |
1740 (7.6%) |
254 (5.1%) |
1994 (7.2%) |
<0.001 |