Table 3 Mothers’ characteristics throughout three periods
From: Sociodemographic characteristics of mother’s population and risk of preterm birth in Chile
N | 1991-1995 | 1996-2000 | 2001-2008 | ||||||
|---|---|---|---|---|---|---|---|---|---|
4 392 427 | 1323021 | 1232824 | 1836582 | aP1-P2 | P2-P3 | P1-P3 | |||
Age | % | n | % | n | % | n | P b | P | P |
<18 (292 891) | 5.6 | 74 659 | 7.2 | 88 197 | 7.1 | 130 035 | <0.001 | <0.014 | <0.001 |
18-38 (3 910 271) | 91.0 | 1 204 514 | 88.8 | 1 095 027 | 87.7 | 1 610 730 | <0.001 | <0.001 | <0.001 |
>38 (189 265) | 3.3 | 43 848 | 4.0 | 49 600 | 5.2 | 95 817 | <0.001 | <0.001 | <0.001 |
Marital Status | |||||||||
Living with partner | 62.1 | 821 803 | 54.9 | 544 980 | 42.3 | 775 989 | <0.001 | <0.001 | <0.001 |
(2 142 772) | |||||||||
Not living with partner | 37.9 | 501 218 | 45.1 | 446 808 | 57.7 | 1 060 593 | <0.001 | <0.001 | <0.001 |
(2 008 619) | |||||||||
Parity | |||||||||
Primipara (1 849 118) | 40.6 | 537 524 | 42.1 | 519 250 | 43.1 | 792 344 | <0.001 | <0.001 | <0.001 |
Multipara (2 471 351) | 57.2 | 756 413 | 56.2 | 692 944 | 55.7 | 1 021 994 | <0.001 | <0.001 | <0.001 |
Grand Multipara | 19.0 | 25 410 | 15.0 | 19 004 | 12.0 | 21 580 | <0.001 | <0.001 | <0.001 |
(65 994) | |||||||||