Table 2 Maternal characteristics, overall and by outcome (preterm birth (PTB), small for gestational age (SGA)), Metropolitan France, SNDS, 2015
Total | PTB | SGA | ||||||
|---|---|---|---|---|---|---|---|---|
% | n | % | n | pa | % | n | pa | |
N | 726,497 | 7.5 | 54,378 | 11.9 | 86,305 | |||
Maternal age (years) | 0.004 | < 0.001 | ||||||
< 20 | 1.9 | 13,950 | 9.2 | 1,285 | 16,2 | 2,256 | ||
[20–25[ | 12.4 | 89,934 | 7.7 | 6,877 | 13,7 | 12,290 | ||
[25–30[ | 31.7 | 230,368 | 7.1 | 16,288 | 11,6 | 26,676 | ||
[30–35[ | 33.4 | 242,236 | 7.0 | 17,032 | 11,2 | 27,208 | ||
≥ 35 | 20.7 | 150,009 | 8.6 | 12,896 | 11,9 | 17,875 | ||
CMU-C | < 0.001 | < 0.001 | ||||||
No | 81.0 | 588,406 | 7.2 | 42,207 | 11,5 | 67,769 | ||
Yes | 19.0 | 138,091 | 8.8 | 12,171 | 13.4 | 18,536 | ||
Previous PTB | < 0.001 | 0.002 | ||||||
No | 97.0 | 704,345 | 7.1 | 50,092 | 11.8 | 83,529 | ||
Yes | 3.0 | 22,152 | 19.4 | 4,286 | 12.5 | 2,776 | ||
Previous SGA | < 0.001 | < 0.001 | ||||||
No | 98.3 | 714,491 | 7.4 | 53,135 | 11.6 | 83,122 | ||
Yes | 1.7 | 12,006 | 10.4 | 1,243 | 26.5 | 3,183 | ||
Parity | < 0.001 | < 0.001 | ||||||
No | 44.4 | 322,349 | 8.7 | 28,023 | 6.8 | 49,295 | ||
Yes | 55.6 | 404,148 | 6.5 | 26,355 | 9.2 | 37,010 | ||
obesity (≥ 30) | < 0.001 | < 0.001 | ||||||
No | 95.0 | 689,894 | 7.3 | 50,646 | 11.4 | 82,509 | ||
Yes | 5.0 | 36,603 | 10.2 | 3,732 | 10.4 | 3,796 | ||
Previous tobacco consumption | < 0.001 | < 0.0001 | ||||||
No | 90.5 | 657,501 | 7.2 | 47,460 | 10.0 | 72,594 | ||
Yes | 9.5 | 68,781 | 10.0 | 6,903 | 19.9 | 13,679 | ||
Previous hypertension | < 0.0001 | < 0.001 | ||||||
No | 98.4 | 714,984 | 7.3 | 52,441 | 11.7 | 83,947 | ||
Yes | 1.6 | 11,513 | 16.8 | 1,937 | 20.5 | 2,358 | ||
Individual maternal deprivation | < 0.0001 | < 0.0001 | ||||||
No | 98.1 | 713,062 | 7.4 | 52,924 | 11.8 | 84,235 | ||
Yes | 1.9 | 13,435 | 10.8 | 1,454 | 15.4 | 20.7 | ||