Descriptive analysis of maternal and neonatal outcomes by maternal age
| ≤19 | 20–34 | Total | Missing | ||||||
| n | % | n | % | n | % | n | % | P values | |
| Whole cohort | 640 | 13.9 | 3951 | 86.1 | 4591 | 100 | |||
| Neonatal outcomes | |||||||||
| Low birth weight (<2500 g) | 56 | 9.3 | 349 | 9.4 | 405 | 9.3 | 0 | 0.0 | 0.933 |
| Very low birth weight (<1500 g) | 9 | 1.6 | 36 | 1.1 | 45 | 1.1 | 0 | 0.0 | 0.248 |
| Extremely low birth weight (<1000 g) | 6 | 1.1 | 10 | 0.3 | 16 | 0.4 | 0 | 0.0 | 0.007 |
| Macrosomia (birth weight >4000 g) | 35 | 6.0 | 223 | 6.2 | 258 | 6.2 | 0 | 0.0 | 0.852 |
| Small for gestational age | 81 | 14.0 | 576 | 16.3 | 657 | 16.0 | 0 | 0.0 | 0.153 |
| Large for gestational age | 61 | 10.9 | 426 | 12.6 | 487 | 12.4 | 0 | 0.0 | 0.256 |
| Preterm delivery (<37 weeks) | 44 | 6.9 | 236 | 6.0 | 280 | 6.1 | 0 | 0.0 | 0.376 |
| Very preterm delivery (<32 weeks) | 12 | 2.0 | 35 | 0.9 | 47 | 1.1 | 0 | 0.0 | 0.021 |
| Extremely preterm delivery (<28 weeks) | 4 | 0.7 | 5 | 0.1 | 9 | 0.2 | 0 | 0.0 | 0.008 |
| Stillborn | 5 | 0.8 | 26 | 0.7 | 31 | 0.7 | 0 | 0.0 | 0.724 |
| Apgar score <7 at 1 min | 75 | 11.7 | 456 | 11.5 | 531 | 11.6 | 0 | 0.0 | 0.896 |
| Apgar score <7 at 5 min | 24 | 3.8 | 136 | 3.4 | 160 | 3.5 | 0 | 0.0 | 0.694 |