Table 1 Demographics of women with normal BMI compared with overweight and obese women

Age (years)^a

26.7 ± 5.9

26.8 ± 5.6

26.4 ± 5.1

0.2 [-0.5,0.8]

0.61

-0.3 [-1.1,0.5]

0.44

GA Entry (weeks)^a

17.2 ± 2.4

17.2 ± 2.4

17.2 ± 2.5

-0.04 [-0.3,0.2]

0.77

-0.05 [-0.4,0.3]

0.77

Systolic BP at Trial Entry (mm Hg)^a

108.2 ± 10.2

111.8 ± 9.9

116.0 ± 9.7

3.6 [2.5,4.8]

< 0.0001

7.8 [6.4,9.2]

< 0.0001

Diastolic BP at Trial Entry (mm Hg)^a

63.8 ± 7.6

66.3 ± 7.9

70.0 ± 7.8

2.5 [1.6,3.4]

< 0.0001

6.1 [5.1,7.2]

< 0.0001

Race

   Caucasian

885 (93.8)

430 (96.4)

261 (96.0)

1.03 [1.00,1.05]

0.03

1.02 [0.99,1.05]

0.14

   Asian

38 (4.0)

6 (1.3)

4 (1.5)

0.33 [0.14,0.78]

0.01

0.36 [0.13,1.01]

0.05

   Other

20 (2.1)

10 (2.2)

7 (2.6)

1.06 [0.50,2.24]

0.88

1.21 [0.52,2.84]

0.66

Education

   Secondary or lower

394 (42.8)

182 (41.8)

124 (46.1)

0.98 [0.86,1.12]

0.74

1.08 [0.93,1.25]

0.33

   Diploma or equiv

199 (21.6)

118 (27.1)

77 (28.6)

1.26 [1.03,1.53]

0.02

1.32 [1.06,1.66]

0.01

   University

328 (35.6)

135 (31.0)

68 (25.3)

0.87 [0.74,1.03]

0.10

0.71 [0.57,0.89]

0.003

Socio-economic index

   Low SEI

222 (23.5)

112 (25.1)

96 (35.3)

1.07 [0.88,1.30]

0.52

1.50 [1.23,1.83]

0.0001

   Low-Mid SEI

155 (16.4)

81 (18.2)

44 (16.2)

1.10 [0.87,1.41]

0.42

0.98 [0.72,1.34]

0.92

   Mid-High SEI

248 (26.3)

119 (26.7)

71 (26.1)

1.01 [0.84,1.22]

0.88

0.99 [0.79,1.25]

0.95

   High SEI

318 (33.7)

134 (30.0)

61 (22.4)

0.89 [0.75,1.05]

0.18

0.67 [0.52,0.84]

0.001

Smoking

198 (21.0)

94 (21.1)

51 (18.8)

1.00 [0.81,1.25]

0.97

0.89 [0.68,1.18]

0.42