Table 1.
Outcome and characteristics of 755 198 mothers and children in different term groups
| 37 weeks | 38 weeks | 39–41 weeks | P‐value | |||||
|---|---|---|---|---|---|---|---|---|
| All births | n = 55 629 | n = 124 788 | n = 574 781 | overall | 37 vs 39–41 weeks | |||
| Outcome | ||||||||
| n | n | n | ||||||
| Intrapartum/neonatal mortality | 61 | 1.10‰ | 81 | 0.65‰ | 336 | 0.59‰ | a | a |
| Adverse neonatal outcome | 1189 | 21.4‰ | 161 | 12.9‰ | 6912 | 12.0‰ | a | a |
| Characteristics | n | % | n | % | n | % | ||
| Maternal | ||||||||
| Nulliparity | 26 787 | 48.2% | 52 659 | 42.2% | 257 109 | 44.7% | a | a |
| Maternal age | ||||||||
| <25 years | 7247 | 13.0% | 14 510 | 11.6% | 63 954 | 11.1% | a | a |
| 25–34 years | 36 697 | 66.0% | 82 820 | 66.4% | 394 510 | 68.6% | a | a |
| ≥35 years | 11 685 | 21.0% | 27 458 | 22.0% | 116 317 | 20.2% | a | a |
| Non‐Caucasian ethnicity | 11 005 | 19.8% | 26 383 | 21.1% | 108 668 | 18.9% | a | a |
| Socio‐economic status | ||||||||
| Low | 14 467 | 26.0% | 32 229 | 24.0% | 137 948 | 24.0% | a | a |
| Mid | 28 619 | 51.4% | 63 221 | 50.6% | 291 033 | 50.6% | a | a |
| High | 12 543 | 22.5% | 29 338 | 25.4% | 145 800 | 25.4% | a | a |
| Hypertensive disorders | 13 080 | 23.5% | 15 657 | 12.6% | 32 924 | 5.7% | a | a |
| Child | ||||||||
| Male gender | 29 493 | 53.0% | 65 018 | 52.1% | 288 546 | 50.2% | a | a |
| SGA<p10$ | 5233 | 9.4% | 10 706 | 8.4% | 48 103 | 8.4% | a | a |
| Delivery | ||||||||
| Spontaneous start of labour | 29 470 | 53.0% | 69 266 | 55.5% | 450 439 | 78.4% | a | a |
| Planned caesarean section | 5209 | 9.4% | 17 872 | 14.3% | 26 423 | 4.6% | a | a |
| Induction of labour | 20 950 | 37.7% | 37 650 | 30.2% | 97 919 | 17.0% | a | a |
| Start labour with primary care | 16 791 | 30.2% | 45 861 | 36.8% | 345 958 | 60.2% | a | a |
| Delivery with primary care | 10 239 | 18.4% | 28 747 | 23.0% | 196 706 | 34.2% | a | a |
a
P < 0.0001; $SGA < p10 = small for gestational age < 10th percentile.