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Table 2 Effect of early pregnancy weight (kg), height (m), and BMI (kg/m2) on haemoglobin concentration (g/dL) at booking with corresponding anaemia risks

From: Does body mass index early in pregnancy influence the risk of maternal anaemia? An observational study in Indonesian and Ghanaian women

 

Indonesian cohort

Ghanaian cohort

Linear regression

  

Coefficient

95% CI

P

Coefficient

95% CI

P

 Weight (kg)

  Haemoglobin (g/dL)

Crude

0.021

0.01, 0.03

< 0.001

0.017

0.01, 0.03

< 0.001

Model 1

0.02

0.01, 0.03

< 0.001

0.017

0.01, 0.03

< 0.001

Model 2

0.02

0.01, 0.03

< 0.001

0.017

0.01, 0.03

< 0.001

Model 3

0.02

0.01, 0.03

< 0.001

0.016

0.01, 0.02

< 0.001

 Height (cm)

  Haemoglobin (g/dL)

Crude

−0.004

−0.02, 0.02

0.71

0.014

−0.001, 0.03

0.07

Model 1

−0.004

−0.02, 0.02

0.67

0.012

− 0.003, 0.03

0.13

Model 2

−0.005

−0.02, 0.01

0.62

0.012

−0.003, 0.03

0.13

Model 3

−0.005

−0.02, 0.01

0.61

0.002

−0.01, 0.02

0.79

 Early pregnancy BMI (kg/m2)

  Haemoglobin (g/dL)

Crude

0.054

0.03, 0.08

< 0.001

0.042

0.02, 0.06

< 0.001

Model 1

0.054

0.03, 0.08

< 0.001

0.042

0.02, 0.06

< 0.001

Model 2

0.054

0.03, 0.08

< 0.001

0.041

0.02, 0.06

< 0.001

Model 3

0.054

0.03, 0.08

< 0.001

0.044

0.02, 0.07

< 0.001

Logistic regression

  

OR

95% CI

P

OR

95% CI

P

 Weight (kg)

  Anaemia (< 11.0 g/dL)

Crude

0.97

0.94, 1.00

0.03

0.98

0.97, 0.99

< 0.001

Model 1

0.96

0.93, 1.00

0.03

0.98

0.97, 0.99

0.001

Model 2

0.96

0.93, 1.00

0.04

0.98

0.97, 0.99

0.001

Model 3

0.96

0.93, 1.00

0.03

0.98

0.97, 0.99

0.002

 Height (cm)

  Anaemia (< 11.0 g/dL)

Crude

1.04

0.99, 1.10

0.13

0.99

0.97, 1.01

0.53

Model 1

1.05

0.99, 1.11

0.09

1

0.98, 1.02

0.75

Model 2

1.05

0.99, 1.11

0.09

1

0.98, 1.02

0.75

Model 3

1.05

0.99, 1.11

0.1

1.01

0.99, 1.03

0.5

 Early pregnancy BMI (kg/m2)

  Anaemia (< 11.0 g/dL)

Crude

0.89

0.82, 0.97

0.01

0.95

0.92, 0.97

< 0.001

Model 1

0.88

0.81, 0.97

0.01

0.95

0.92, 0.98

0.001

Model 2

0.88

0.80, 0.97

0.01

0.95

0.92, 0.98

0.001

Model 3

0.88

0.81, 0.97

0.01

0.95

0.92, 0.98

< 0.001

  1. OR odds ratio
  2. Results are expressed as linear regression coefficients of haemoglobin concentration in g/dL or logistic regression coefficients of maternal anemia for every 1 unit increase in exposures
  3. Model 1 is adjusted for maternal age, education level and employment status
  4. Model 2 is adjusted as for model 1 and for gravidity
  5. Model 3 is adjusted as for model 2 and for secondhand smoking exposure in Indonesian cohort or anaemia-associated-comorbidities in Ghanaian cohort
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BMC Public Health

ISSN: 1471-2458

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