From: A matched case–control study of preterm birth in one hospital in Beijing, China
Related factors | β | Waldsχ2 | OR | 95% CI | P |
---|---|---|---|---|---|
University or graduate education | 0.097 | 0.050 | 1.10 | 0.47-2.57 | 0.823 |
Family income <1000 dollars per month | 0.386 | 0.875 | 1.47 | 0.66-3.31 | 0.350 |
Family living space <20 m2 per person | −0.234 | 0.254 | 0.79 | 0.32-1.97 | 0.614 |
Prenatal care visits ≥ 8 times | −1.852 | 12.458 | 0.16 | 0.06-0.44 | <0.001 |
Anxiety during pregnancy | 0.482 | 1.784 | 1.62 | 0.80-3.28 | 0.182 |
Reproductive tract infection during pregnancy | 0.602 | 2.758 | 1.83 | 0.90-3.72 | 0.097 |
Gestational hypertension | 2.040 | 15.349 | 7.69 | 2.77-21.32 | <0.001 |
Gestational diabetes mellitus | 0.2110 | 0.180 | 1.24 | 0.47-3.27 | 0.671 |
Balanced diet | −1.023 | 4.717 | 0.36 | 0.14-0.91 | 0.030 |
Supplement folic acid ≥3 months during pregnancy | −0.162 | 0.197 | 0.85 | 0.42-1.74 | 0.657 |
Pre-pregnancy BMI <18.5 kg/m2 | 0.145 | 0.086 | 1.16 | 0.44-3.05 | 0.769 |
Pre-pregnancy BMI ≥24 kg/m2 | 0.362 | 0.632 | 1.44 | 0.59-3.50 | 0.427 |
Low growth weight gain | 1.104 | 7.402 | 3.02 | 1.36-6.68 | 0.007 |
High growth weight gain | −0.886 | 4.226 | 0.41 | 0.18-0.96 | 0.040 |