From: Sociodemographic characteristics of mother’s population and risk of preterm birth in Chile
Periods | 1991-1995 | 1996-2000 | 2001-2008 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mothers’ characteristicsb | Crude OR | CI [95%] | Adjusted ORc | CI [95%]c | Crude OR | CI [95%] | Adjusted OR | CI [95%] | Crude OR | CI [95%] | Adjusted OR | CI [95%] | |
Age | <18 | 1.42 | [1.38,1.47] | 1.26 | [1.22,1.30] | 1.33 | [1.29,1.37] | 1.24 | [1.21,1.28] | 1.28 | [1.25,1.31] | 1.20 | [1.17,1.23] |
18-38 | 1.0 Referenced | 1.0 Reference | 1.0 Reference | ||||||||||
>38 | 1.76 | [1.69,1.82] | 1.78 | [1.72,1.85] | 1.76 | [1.70,1.82] | 1.82 | [1.75,1.88] | 1.59 | [1.56,1.63] | 1.65 | [1.61,1.69] | |
Marital Status | Living with a partner | 1.0 Reference | 1.0 Reference | 1.0 Reference | |||||||||
Not living with a partner | 1.20 | [1.18,1.22] | 1.16 | [1.14,1.18] | 1.06 | [1.04,1.08] | 1.02 | [1.00,1.04] | 1.03 | [1.02,1.04] | 1.17 | [1.14,1.20] | |
Parity | Primiparous | 1.09 | [1.08,1.12] | 1.07 | [1.05,1.09] | 1.10 | [1.08,1.12] | 1.11 | [1.09,1.13] | 1.10 | [1.09,1.12] | 1.12 | [1.11,1.14] |
Multipara | 1.0 Reference | 1.0 Reference | 1.0 Reference | ||||||||||
Grand multipara | 1.38 | [1.31,1.46] | 1.33 | [1.25,1.42] | 1.30 | [1.22,1.38] | 1.28 | [1.19,1.38] | 1.30 | [1.23,1.37] | 1.26 | [1.18,1.35] |