Table 1 Characteristics of study population according to supplementation group

Sex

   Male

91

45.5

42

41.6

49

49.5

   Female

109

54.5

59

58.4

50

50.5

0.261

Age (years)^b

9.3

1.9

9.3

2.1

9.4

1.7

0.728

Height for age^c

   Normal

136

69.1

72

72.7

64

66.0

   Low or moderate malnutrition

60

30.6

27

27.3

33

34.0

0.305

Body mass index^d

   Normal

147

73.0

70

70.7

73

75.3

   Overweight or obese

53

27.0

29

29.3

24

24.7

0.473

Mother’s schooling

   High school or more

60

32.3

30

31.9

30

32.6

   Middle school or less

126

67.7

64

68.1

62

67.4

0.919

Hemoglobin concentration (g/l)^b

140.9

9.1

141.6

10.3

140.2

7.6

0.273

Ferritin concentration (μg/l)^b

8.7

2.1

8.7

2.1

8.9

2.1

0.548