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Table 1 Maternal and pregnancy characteristics, Colorado singleton births, 1998–1999

From: Birth outcomes in Colorado's undocumented immigrant population

Maternal characteristics Undocumented immigrants N = 5961 (%) All other women N = 112,943 (%) p-value
Demographics    
   Age    <.001
<17 3.1 2.2  
17–35 93.4 87.0  
>35 3.5 10.8  
   Education: high school graduate 29.5 82.7 <.001
   Not married 34.6 25.3 <.001
   Parity    0.02
0 42.7 43.4  
1–2 47.5 47.9  
>2 9.8 8.7  
Behavioral characteristics    
   Smoking 1.9 11.1 <.001
   Alcohol Use 0.3 1.3 <.001
   Weight Gain <20 lbs. 23.5 12.7 <.001
   Number of Prenatal Visits    <.001
<9 47.3 20.1  
9–15 49.6 69.3  
>15 3.1 9.6  
   Trimester Care Began    <.001
No prenatal care 1.7 1.0  
1 52.0 83.3  
2 34.3 12.9  
3 12.0 2.8  
Medical risk factors    
   Anemia 7.7 2.2 <.001
   Lung disease 0.8 0.5 .004
   Gestational diabetes 2.7 1.7 <.001
   Hypertension 2.9 3.2 0.23
   Oligohydramnios 3.8 1.1 <.001
   Previous >4000 gms birth 3.1 0.7 <.001
   Previous preterm birth 2.1 1.3 <.001
   No risk factors 51.5 76.0 <.001