TABLE 1.

Characteristics of the cohort used in this studya

Group (n)Age (yr)Hemoglobin level (g/dl)Birth wt (kg)Gestational age (wk)
All mothers
    Primigravid (571)19.8 ± 2.39.8 ± 2.53.08 ± 0.5236.4 ± 3.7
    Secundigravid (305)21.8 ± 2.89.9 ± 2.83.23 ± 0.5036.8 ± 3.2
    Multigravid (453)28.0 ± 5.29.7 ± 2.53.36 ± 0.5036.7 ± 3.4
Mothers included in antibody studies
    Primigravid (47)20.4 ± 2.79.6 ± 2.83.19 ± 0.4936.4 ± 2.7
    Secundigravid (68)21.2 ± 2.79.7 ± 3.13.18 ± 0.5336.5 ± 2.6
    Multigravid (53)26.4 ± 5.79.2 ± 2.23.41 ± 0.4437.4 ± 2.3
  • a The whole cohort of women who entered the study is compared to the subset of mothers randomly selected for studies of antiadhesion antibodies. Values are means ± standard errors. Women whose plasma samples were studied for antiadhesion activity did not differ significantly from the primary cohort on the basis of age, hemoglobin level, birth weight, or gestational age of their neonates. P > 0.05 for all comparisons within gravid groups (Mann-Whitney test).