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Table 4 Difference (95% CI) in blood pressure by categories of BMI and Hb levels in second trimester

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

 

Non-high BMI (<28.5 kg/m2)

High BMI (≥28.5 kg/m2)

 

Hb <13.0 g/dL

Hb ≥13.0 g/dL

Hb <13.0 g/dL

Hb ≥13.0 g/dL

Number

2201

488

190

109

SBP (mmHg)a

106.3

107.7

108.6

108.9

Model 1b

0.0 (reference)

1.1 (-1.3, 3.4)

2.2 (-0.6, 5.0)

3.2 (1.0, 5.5)

Model 2c

0.0 (reference)

0.9 (-1.5, 3.3)

2.1 (-0.4, 4.6)

3.0 (0.9, 5.1)

Model 3d

0.0 (reference)

0.6 (-1.6, 2.8)

1.9 (-0.5, 4.3)

2.6 (0.4, 4.8)

DBP (mmHg)a

66.2

66.4

67.2

68.1

Model 1b

0.0 (reference)

0.5 (-1.9, 2.8)

1.4 (-1.0, 3.8)

2.2 (-0.8, 5.2)

Model 2c

0.0 (reference)

0.2 (-2.0, 2.5)

1.2 (-1.1, 3.7)

2.2 (-0.7, 5.1)

Model 3d

0.0 (reference)

-0.2 (-2.3, 1.9)

0.8 (-1.5, 3.2)

1.5 (-1.3, 4.3)

  1. CI, confidence interval; SBP, systolic blood pressure; DBP, diastolic blood pressure; Hb, Hemoglobin.
  2. aMean SBP; mean DBP.
  3. bModel 1: Adjusted for age (continuous) and ethnicity (Han, Zhuang, other).
  4. cModel 2: Further adjusted for education (<12 years, ≥12 years), family income < US$ 3000 (yes, no), urban residence (yes, no), parity (0, 1, >1), and folic acid supplement (yes, no).
  5. dModel 3: Further adjusted for total cholesterol (continuous), triglycerides (continuous), and diabetes mellitus (yes, no).
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BMC Public Health

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