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Table 5 Difference (95% CI) in blood pressure by categories of BMI and Hb levels in third trimester

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

 

Non-high BMI (<30.9 kg/m2)

High BMI (≥30.9 kg/m2)

 

Hb <13.0 g/dL

Hb ≥13.0 g/dL

Hb <13.0 g/dL

Hb ≥13.0 g/dL

Number

1435

600

148

78

SBP (mmHg)a

111.3

112.5

113.6

116.9

Model 1b

0.0 (reference)

1.3 (-1.0, 3.7)

2.2 (0.3, 4.1)

5.8 (3.2, 8.4)

Model 2c

0.0 (reference)

1.2 (-1.0, 3.4)

2.2 (0.2, 4.1)

5.6 (3.1, 8.1)

Model 3d

0.0 (reference)

0.8 (-1.1, 2.7)

2.0 (0.3, 3.7)

4.8 (2.3, 7.4)

DBP (mmHg)a

72.5

74.0

74.8

78.5

Model 1b

0.0 (reference)

1.9 (-0.6, 4.3)

2.5 (0.4, 4.7)

6.5 (3.8, 9.1)

Model 2c

0.0 (reference)

1.7 (-0.5, 3.9)

2.4 (0.3, 4.5)

6.2 (3.6, 8.8)

Model 3d

0.0 (reference)

1.2 (-1.0, 3.4)

2.2 (0.2, 4.2)

5.7 (3.2, 8.3)

  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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