Spontaneous preterm birth (PTB) (<37 weeks) rate by maternal height categories in eight selected groups of maternal nationality at birth
| Maternal nationality | Overall PTB | PTB by height categories | ||||
| Rank | n | % | Short % | Middle % | Tall % | |
| Italian (n=3922) | 1 | 301 | 7.7 | 10.3 | 7.2 | 5.9 |
| Belgian (n=69 705) | 2 | 5321 | 7.6 | 9.4 | 7.4 | 6.0 |
| Congolese (n=2904) | 3 | 199 | 6.9 | 7.2 | 6.3 | 7.7 |
| French (n=5020) | 4 | 326 | 6.5 | 7.3 | 6.8 | 4.6 |
| Turks (n=3259) | 5 | 205 | 6.3 | 7.8 | 6.2 | 4.9 |
| Romanians (n=2904) | 6 | 130 | 6.2 | 7.0 | 5.8 | 5.9 |
| Polish (n=1924) | 7 | 116 | 6.0 | 8.6 | 4.9 | 5.7 |
| Moroccans (n=14 040) | 8 | 626 | 4.5 | 4.9 | 4.3 | 4.1 |