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Table 1 Characteristics of participants according to Hb category levels (n = 1532)

From: A relationship between a level of hemoglobin after delivery and exclusive breastfeeding initiation at a baby friendly hospital in Japan

 

Hb < 9.0

9.0 ≤ Hb ≤ 11.0

12.0 ≤ Hb

P*

n = 205

n = 762

n = 565

N

%

N

%

N

%

Maternal age, years, mean ± SD

33.9

5.4

34.1

4.8

33.7

5.1

0.484

Pre-pregnancy BMI, kg/m2

   

0.925

  < 18.5

48

23.4

175

23.0

135

23.9

 

 18.5–24.9

157

76.6

587

77.0

430

76.1

 

Nulliparity

153

74.6

492

64.6

323

57.2

<0.001

Caesarean section

49

24.0

134

17.6

61

10.8

<0.001

Pregnancy Induced Hypertension

17

8.3

26

3.4

17

3.0

0.002

Gestational week at delivery, mean ± SD

39.5

1.1

39.4

1.1

39.2

1.1

<0.001

Bleeding amount at delivery, mean ± SD

907.6

473.5

519.1

291.4

366.8

254.2

<0.001

Birth weight of infant, mean ± SD

3127.8

345.1

3083.4

354.3

3029.1

352.0

<0.001

Immediate separation after delivery

21

10.2

51

6.7

34

6.0

0.117

Breastfeeding at discharge

149

72.7

624

81.9

484

85.7

<0.001

Breastfeeding at 1 month

126

63.0

518

68.9

422

75.9

<0.001

  1. *Based on Chi-square test or Analysis of Variance