TABLE 1

Maternal and Delivery Characteristics

CharacteristicsWeighted CohortWeighted Late PretermWeighted Full TermWeighted P
Age, mean (SD)27.327.5 (6.9)27.3 (7.9).2748
Race, %
    White80.875.181.4
    Black14.820.414.3<.0001
    Other4.44.54.3
Education, %
    < High school5.74.85.7
    High school46.952.546.4.0229
    College and beyond47.442.747.9
Marital status, %
    Married67.561.868.2.0018
    Unmarried32.538.231.8
Depression, %6.08.35.8.0220
English is primary language, %81.280.381.3.7248
Household income, %
    20 000 or less24.730.324.1
    20 001–30 00014.815.414.6.0026
    30 001–50 00021.621.921.7
    50 001–75 00016.114.916.3
    ≥75 00122.717.523.3
Impoverished, %21.430.320.3<.0001
Prenatal care use, %
    Inadequate10.610.710.5<.0001
    Intermediate14.85.415.8
    Adequate44.112.847.2
    Adequate plus30.471.126.6
No tobacco use during pregnancy, %87.585.687.8.1837
No alcohol use during pregnancy, %99.599.599.5.9804
Delivery type, %
    Vaginal74.667.075.4<.0001
    Cesarean delivery25.433.024.6