Table 3 Black subgroup demographic and clinical characteristics

Maternal age, years (Mdn (min-max))

20.0 (14-37)

20.0 (14-37)

0.99^a

Gravida (Mdn (min-max))

1 (1-6)

1 (1-6)

0.38^a

Nulliparous (n, %)

25 (83.3%)

25 (83.3%)

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Gestational age at delivery, wks (Mdn (min-max))

36.9 (27.4-40.0)

40.6 (37.1-42.1)

< 0.001 ^a

Birthweight, grams (M (SD))

2313.9 (715.8)

3388.8 (405.3)

< 0.001 ^b

Avg. SBP < 20 weeks’, mm Hg (M (SD)) ^c

113.3 (9.2)

114.4 (6.8)

0.60^d

Avg. DBP < 20 weeks’, mm Hg (M (SD)) ^c

70.4 (6.5)

69.2 (4.2)

0.41^d

Avg. SBP in labor, mm Hg (M (SD)) ^e

159.9 (17.8)

120.7 (9.1)

< 0.001 ^b

Avg. DBP in labor, mm Hg (M (SD)) ^e

97.1 (10.4)

72.6 (7.4)

< 0.001 ^d

Pre-pregnancy BMI (Mdn (min-max)) ^f

23.0 (17.7-38.4)

25.8 (19.4-49.9)

0.25^a