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Table 4 Associations between blood pressures (per 1-SD increase) and size at birth by maternal BMI *

From: The association between maternal blood pressures and offspring size at birth in Southeast Asian women

Maternal BMI according to WHO classification

N

Peripheral systolic blood pressure (1 SD = 11.1 mmHg)

Peripheral diastolic blood pressure (1 SD = 8.3 mmHg)

Central systolic blood pressure (1 SD = 10.0 mmHg)

Central pulse pressure (1 SD = 6.5 mmHg)

ß (95% CI)

ß (95% CI)

ß (95% CI)

ß (95% CI)

Weight (g)

     

 BMI <25.0 kg/m2

329

−74.50 (−117.92 to −31.08)

−38.79 (−80.33 to 2.74)

−81.36 (−122.36 to −40.32)

−66.81 (−105.84 to −27.80)

 BMI 25.0-29.9 kg/m2

259

−26.64 (−79.84 to 26.56)

−60.87 (−111.65 to −10.10)

−41.90 (−94.50 to 10.69)

13.56 (−31.22 to 58.35)

 BMI ≥30.0 kg/m2

125

14.59 (−72.21 to 101.40)

80.71 (−8.57 to 170.01)

41.23 (−45.56 to 128.03)

−24.39 (−99.09 to 50.31)

 P for interaction

 

0.06

0.02

0.02

0.02

Length (cm) **

     

 BMI <25.0 kg/m2

327

−0.40 (−0.65 to −0.15)

−0.18 (−0.42 to 0.05)

−0.44 (−0.68 to −0.21)

−0.40 (−0.63 to −0.18)

 BMI 25.0-29.9 kg/m2

259

0.04 (−0.25 to 0.33)

−0.29 (−0.56 to −0.01)

−0.09 (−0.38 to 0.19)

0.18 (−0.06 to 0.42)

 BMI ≥30.0 kg/m2

125

−0.07 (−0.48 to 0.34)

0.51 (0.09 to 0.93)

0.12 (−0.29 to 0.54)

−0.31 (−0.66 to 0.04)

 P for interaction

 

0.04

0.009

0.03

0.001

Head circumference (cm) **

   

 BMI <25.0 kg/m2

327

−0.19 (−0.35 to −0.04)

−0.20 (−0.35 to −0.06)

−0.22 (−0.37 to −0.07)

−0.07 (−0.21 to 0.07)

 BMI 25.0-29.9 kg/m2

259

−0.08 (−0.27 to 0.10)

−0.10 (−0.28 to 0.08)

−0.12 (−0.31 to 0.06)

−0.03 (−0.19 to 0.12)

 BMI ≥30.0 kg/m2

125

0.17 (−0.11 to 0.45)

0.31 (0.02 to 0.59)

0.13 (−0.15 to 0.42)

−0.12 (−0.36 to 0.12)

 P for interaction

 

0.04

0.004

0.05

0.87

Placenta weight (g) ***

    

 BMI <25.0 kg/m2

323

−17.72 (−32.74 to −2.69)

−11.45 (−25.67 to 2.76)

−20.54 (−34.79 to −6.29)

−14.05 (−27.27 to −0.83)

 BMI 25.0-29.9 kg/m2

256

−5.85 (−21.75 to 10.06)

−9.62 (−24.95 to 5.71)

−10.14 (−25.91 to 5.62)

−1.76 (−15.11 to 11.58)

 BMI ≥30.0 kg/m2

120

−0.26 (−27.15 to 26.63)

4.16 (−23.54 to 31.87)

1.23 (−25.54 to 27.99)

−2.27 (−25.05 to 20.51)

 P for interaction

 

0.18

0.49

0.15

0.25

  1. SD, standard deviation; CI, confidence interval; BMI, body mass index.
  2. *Multiple linear regression models were used with adjustment for baby’s sex, gestation at delivery, maternal age, ethnicity, education, parity, smoking history, height, BMI at 27 weeks gestation, coffee consumption and depression.
  3. **There were 2 women with missing information on length and head circumference.
  4. ***There were 14 women with missing information on placental weight.