TABLE 1

Maternal Sociodemographic, Obstetric, and Infant Birth Data for Birth Weight and Gestational Age Subgroups

ELBW GroupELGA Group
Period 1 (1996–1999) (n = 122)Period 2 (2000–2003) (n = 109)PPeriod 1 (1996–1999) (n = 118)Period 2 (2000–2003) (n = 107)P
Maternal sociodemographic factors
    Age, mean ± SD, wk27.3 ± 6.727.7 ± 7.4.67327.6 ± 6.827.3 ± 7.1.738
    Married, n (%)55 (45)40 (37).19655 (47)40 (37).162
    Black race, n (%)70 (57)68 (62).43866 (56)67 (63).308
    Education, n (%)
        Greater than high school60 (50)44 (41).120a57 (49)42 (40).070a
        Completed high school44 (36)42 (39)44 (38)40 (38)
        Less than high school17 (14)22 (20)16 (14)24 (23)
Perinatal factors
    Chorioamnionitis, n (%)17 (14)13 (12).65015 (13)13 (12).898
    Prenatal steroid therapy, n (%)85 (70)89 (82).03585 (72)89 (83).046
    Cesarean section, n (%)68 (56)60 (55).91664 (54)56 (52).775
    Infant born at another hospital, n (%)9 (7)11 (10).4649 (8)10 (9).643
Infant birth data
    Birth weight, mean ± SD, g750.1 ± 126.1739.2 ± 122.8.507769.1 ± 153.4748.3 ± 143.4.295
    Gestational age, mean ± SD, wk25.5 ± 1.625.2 ± 1.4.10925.2 ± 1.325.1 ± 1.2.275
    Male gender, n (%)58 (48)54 (50).76156 (48)53 (50).756
    Multiple birth, n (%)14 (11)25 (23).02016 (14)25 (23).057
    Weight z score at birth,31 mean ± SD−0.4 ± 0.8−0.3 ± 0.7.404−0.2 ± 0.7−0.2 ± 0.7.736
  • In some instances, data were missing for 1 or 2 children.

  • a Cochran-Armitage test.