Table 1—

Characteristics of the 9,439 mother-child pairs

Maternal age at screen
    <18 years260 (2.7)
    18–25 years2,821 (29.9)
    26–30 years2,187 (23.2)
    31–35 years2,830 (30.0)
    ≥36 years1,341 (14.2)
Parity
    04,019 (42.6)
    13,155 (33.4)
    21,429 (15.1)
    ≥3821 (8.7)
    Unknown15 (0.2)
Maternal weight gain
    0–24 lb2,014 (21.3)
    25–31 lb2,078 (22.0)
    32–40 lb1,866 (19.8)
    ≥41 lb1,480 (15.7)
    Unknown2,001 (21.2)
Ethnicity
    Caucasian4,103 (43.5)
    Hawaiian2,056 (21.8)
    Filipino1,235 (13.1)
    Japanese571 (6.1)
    Pacific Islander (other than Hawaiian or Samoan)345 (3.7)
    Chinese249 (2.6)
    Hispanic209 (2.2)
    African American180 (1.9)
    Samoan169 (1.8)
    Other*322 (3.4)
    Birth weight >4,000 g1,147 (12.2)
    Sex of baby female4,618 (48.9)
  • Data are n (%).

  • *

    * Other includes Korean (98), Puerto Rican (58), Native American (54), Vietnamese (39), other categories (60), and unknown (13).

  • Prior to current pregnancy.