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Table 3 Regression coefficient (95% CI) † of additive model for blood pressure by categories of BMI and Hb levels in pregnancy

From: Interaction of body mass index and hemoglobin concentration on blood pressure among pregnant women in Guangxi, China

Variable

SBP

DBP

β(95% CI)

Pvalue

β(95% CI)

Pvalue

First trimester

    

 Constant

70.3 (64.0, 76.6)

<0.001

55.6 (47.9, 63.3)

<0.001

 bmi

2.6 (0.3, 4.9)

0.01

2.5 (0.1, 4.9)

0.03

 hb

1.4 (-0.3, 3.1)

0.09

1.0 (-1.0, 3.0)

0.16

 bmi × hb

-1.1 (-3.7, 1.6)

0.14

0.4 (-2.3, 3.1)

0.38

Second trimester

    

 Constant

72.1 (65.8, 78.4)

<0.001

56.9 (49.1, 64.7)

<0.001

 bmi

1.9 (-0.5, 4.3)

0.22

0.8 (-1.5, 3.2)

0.32

 hb

0.6 (-1.6, 2.8)

0.54

-0.2 (-2.3, 1.9)

0.63

 bmi × hb

0.1 (-2.6, 2.8)

0.30

0.9 (-1.7, 3.5)

0.11

Third trimester

    

 Constant

74.1 (67.8, 80.4)

<0.001

59.3 (51.6, 67.0)

<0.001

 bmi

2.0 (0.3, 3.7)

0.009

2.2 (0.2, 4.2)

0.01

 hb

0.8 (-1.1, 2.7)

0.27

1.2 (-1.0, 3.4)

0.12

 bmi × hb

2.0 (0.1, 3.9)

0.02

2.3 (0.4, 4.3)

0.004

  1. †Adjusted for age (continuous), ethnicity (Han, Zhuang, other), education (<12 years, ≥12 years), family income < US$ 3000 (yes, no), urban residence (yes, no), parity (0, 1, >1), folic acid supplement (yes, no), total cholesterol (continuous), triglycerides (continuous), and diabetes mellitus (yes, no).
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BMC Public Health

ISSN: 1471-2458

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