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Table 3 Selected baseline characteristics of the sample by treatment group

From: Rationale, design, methodology and sample characteristics for the Vietnam pre-conceptual micronutrient supplementation trial (PRECONCEPT): a randomized controlled study

 

Black

Brown

Green

Orange

Red

Violet

Total

Maternal characteristics

      

Mean age ±SD

26.2 ± 4.4

26.0 ± 4.6

26.0 ± 4.4

26.4 ±4.7

26.0 ±4.5

26.2 ±4.7

26.2 ± 4.6

Age at first married

21.8 ± 3.3

21.7 ± 3.3

21.8 ± 3.3

21.8 ±3.3

21.8 ±3.3

21.8 ±3.3

21.8 ± 3.3

Minority ethnic (%)

50.2

49.5

49.5

49.2

49.0

49.6

49.5

Education level (%)

       

Primary school

8.5

6.5

7.4

8.6

9.1

9.4

8.2

Secondary school

55.3

56.2

57.7

53.1

51.6

54.3

54.7

High school

24.5

25.9

22.4

26.8

27.6

23.2

25.1

College or higher

11.6

11.4

12.6

11.5

11.7

13.1

12.0

Work as farmers

80.2

81.5

78.9

81.6

80.8

80.6

80.6

Obstetric history

       

Number of children

       

0

9.4

11.8

12.6

10.9

10.5

11.9

9.4

1

88.1

84.9

84.7

85.0

85.8

84.9

88.1

≥2

2.5

3.4

2.8

4.1

3.7

3.1

2.5

Last pregnancy experiences

      

Prenatal check up

90.6

92.3

88.9

89.2

88.6

90.6

90.0

Taking IFA or MM

75.71

80.2

77.4

78.2

75.6

80.8

78.0

C-section

13.8

14.6

15.1

15.5

16.5

14.5

15.0

LBW (<2500 g)

7.2

7.1

8.1

9.9

8.6

8.7

8.3

Premature delivery

8.0

7.9

10.4

9.7

10.7

9.3

9.3

Anthropometric measurements

      

Height

152.4 ±5.0

152.8 ±5.3

152.6 ±5.2

152.4 ±5.0

152.4 ±5.2

152.4 ±5.2

152.5 ±5.2

Weight

45.7 ± 5.3

45.7 ± 5.6

45.6 ± 5.5

45.4 ±5.3

45.7 ±5.9

45.5 ±5.7

45.6 ± 5.5

BMI

19.6 ± 2.0

19.6 ± 2.1

19.5 ± 2.0

19.5 ±2.0

19.7 ±2.1

19.6 ±2.1

19.6 ± 2.0

BMI<18.5 (%)

30.5

31.1

33.1

30.3

31.3

31.9

31.4

MUAC

24.5 ± 2.2

24.5 ± 2.3

24.5 ± 2.2

24.5 ±2.2

24.6 ±2.4

24.4 ±2.3

24.5 ± 2.3

Triceps skin fold

15.8 ± 5.1

15.7 ± 5.1

15.9 ± 4.9

15.8 ±5.0

16.2 ±5.1

15.9 ±5.0

15.9 ± 5.0

Subscapular skinfold

14.5 ± 5.0

14.5 ± 5.3

14.5 ± 4.8

14.3 ±5.2

14.8 ±5.3

14.5 ±5.1

14.5 ± 5.1

Calf circumference

31.9 ± 2.1

31.8 ± 2.3

31.8 ± 2.2

31.8 ±2.1

31.9 ±2.3

31.7 ±2.2

31.8 ± 2.2

Hematological indicators

      

Hemoglobin

13.0 ± 1.4

12.9 ± 1.4

12.9 ± 1.3

12.9 ±1.4

13.0 ±1.4

13.0 ±1.3

12.9 ± 1.4

Anemia (%)

19.7

21.0

19.3

20.4

20.0

18.1

19.7