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Table 3 Crude and adjusted ORs (95% CI) of infant anemia for maternal BMI during early pregnancy

From: Association of maternal BMI during early pregnancy with infant anemia: a large Chinese birth cohort

Infant anemia

Early pregnancy BMI, n (%)

Underweight

Normal weight

Overweight

Obesity

Anemia at 6 months a

107 (7.1)

688 (6.4)

301 (7.3)

64 (8.7)

Crude OR

1.13 (0.91, 1.39)

1.00

1.16 (1.01, 1.34)*

1.41 (1.08, 1.84)*

Adjusted ORb

1.14 (0.90, 1.44)

1.00

1.19 (1.02, 1.39)*

1.45 (1.08, 1.95)*

Adjusted OR c

1.14 (0.90, 1.44)

1.00

1.17 (1.00, 1.37)*

1.40 (1.04, 1.89)*

Adjusted OR d

1.08 (0.85, 1.37)

1.00

1.15 (0.98, 1.35)

1.39 (1.02, 1.88)*

Anemia at 12 months a

85 (5.6)

549 (5.1)

235 (5.7)

35 (4.8)

Crude OR

1.12 (0.89, 1.42)

1.00

1.13 (0.97, 1.32)

0.94 (0.66, 1.33)

Adjusted ORb

1.02 (0.78, 1.34)

1.00

1.13 (0.94, 1.34)

1.01 (0.70, 1.48)

Adjusted OR c

1.04 (0.80, 1.37)

1.00

1.12 (0.94, 1.33)

0.98 (0.67, 1.43)

Adjusted OR d

1.02 (0.78, 1.34)

1.00

1.11 (0.93, 1.33)

0.99 (0.68, 1.45)

  1. a The proportions were calculated for infant anemia
  2. b Adjusted covariates were maternal age, ethnicity, education status, occupation, micronutrient supplementation, and infant’s sex, gestational age, feeding mode, and age of infant at hemoglobin measurement
  3. c Additionally adjusted for rate of gestational weight gain, mode of delivery, and birth weight
  4. d Further adjusted for mid-pregnancy anemia and gestational week when hemoglobin was measured during pregnancy
  5. *P < 0.05