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Table 1 Neonatal vitamin A supplementation (VAS) and anthropometric measurements at 2 months, overall and by BCG-group

From: The effect of neonatal vitamin A supplementation on growth in the first year of life among low-birth-weight infants in Guinea-Bissau: two by two factorial randomised controlled trial

  

Overall

BCG

No BCG

Interaction between BCG and VAS

All

 

VAS

Placebo

Difference*(CI: 95%)

RR *(CI: 95%)

VAS

Placebo

Difference** (CI: 95%)

RR ** (CI: 95%)

VAS

Placebo

Difference** (CI: 95%)

RR ** (CI: 95%)

 
 

Number

693

697

  

353

350

  

340

347

   
 

Median age in days

67

66

  

67

66

  

66

66

   
 

  Weight, kg

4.25

4.29

−0.01 (−0.07; 0.06)

 

4.27

4.24

0.05 (−0.04; 0.14)

 

4.22

4.34

−0.07 (−0.16; 0.03)

 

P = 0.08

 

  Weight-for-age   (WAZ), z-score

−2.13

−2.08

−0.02 (−0.12; 0.09)

 

−2.09

−2.19

0.08 (−0.07; 0.23)

 

−2.17

−1.98

−0.11 (−0.26; 0.04)

 

P = 0.07

 

  Underweight   (WAZ < −2)

35%

36%

 

0.95 (0.83; 1.07)

35%

37%

 

0.90 (0.76; 1.08)

35%

35%

 

0.99 (0.83; 1.19)

P = 0.48

 

  Length, cm

53.0

53.3

−0.11 (−0.37; 0.13)

 

52.9

53.2

−0.10 (−0.45; 0.25)

 

53.1

53.4

−0.13 (−0.49; 0.22)

 

P = 0.88

 

  Length-for-age   (LAZ), z-score

−2.67

−2.53

−0.06 (−0.17; 0.05)

 

−2.71

−2.58

−0.04 (−0.20; 0.12)

 

−2.62

−2.48

−0.09 (−0.24; 0.07)

 

P = 0.66

 

  Stunting (LAZ < −2)

51%

48%

 

1.05 (0.93; 1.11)

51%

49%

 

1.07 (0.94; 1.22)

51%

46%

 

1.02 (0.90; 1.16)

P = 0.61

 

  Head circumference, cm

37.4

37.4

0.05 (−0.10; 0.21)

 

37.5

37.4

0.18 (−0.04; 0.40)

 

37.3

37.5

−0.08 (−0.30; 0.14)

 

P = 0.10

 

  Head circumference-for-age, z-score

−1.32

−1.34

0.05 (−0.06; 0.17)

 

−1.25

−1.39

0.16 (0.00; 0.32)

 

−1.41

−1.29

−0.06 (−0.22; 0.10)

 

P = 0.06

Boys

              
 

Number

311

324

  

154

167

  

157

157

   
 

Median age in days

66

66

  

67

65

  

66

69

   
 

  Weight, kg

4.38

4.42

0.00 (−0.09; 0.10)

 

4.39

4.33

0.08 (−0.05; 0.22)

 

4.37

4.52

−0.08 (−0.22; 0.06)

 

P = 0.15

 

  Weight-for-age (WAZ), z-score

−2.29

−2.23

0.01 (−0.15; 0.17)

 

−2.30

−2.34

0.06 (−0.15; 0.28)

 

−2.29

−2.11

−0.05 (−0.27; 0.17)

 

P = 0.54

 

  Underweight (WAZ < −2)

42%

40%

 

1.04 (0.88; 1.23)

44%

43%

 

1.02 (0.81; 1.28)

40%

38%

 

1.06 (0.83; 1.37)

P = 0.80

 

  Length, cm

53.4

53.6

−0.04 (−0.41; 0.33)

 

53.3

53.3

0.10 (−0.42; 0.63)

 

53.5

53.9

−0.19 (−0.72; 0.34)

 

P = 0.47

 

  Length-for-age (LAZ), z-score

−2.91

−2.80

−0.01 (−0.17; 0.15)

 

−2.98

−2.89

−0.03 (−0.26; 0.19)

 

−2.85

−2.70

0.01 (−0.21; 0.24)

 

P = 0.75

 

  Stunting (LAZ < −2)

61%

55%

 

1.08 (0.96; 1.21)

60%

60%

 

1.01 (0.86; 1.18)

62%

51%

 

1.15 (0.97; 1.37)

P = 0.69

 

  Head circumference, cm

37.8

37.8

0.10 (−0.13; 0.32)

 

38.0

37.6

0.37 (0.06; 0.69)

 

37.7

38.0

−0.19 (−0.51; 0.12)

 

P = 0.02

 

  Head circumference-for-age, z-score

−1.46

−1.45

0.09 (−0.09; 0.26)

 

−1.37

−1.54

0.26 (0.01; 0.49)

 

−1.55

−1.35

−0.08 (−0.33; 0.16)

 

P = 0.06

Girls

              
 

Number

382

373

  

199

183

  

183

190

   
 

Median age in days

67

66

  

68

67

  

67

66

   
 

  Weight, kg

4.14

4.18

−0.01 (−0.10; 0.08)

 

4.19

4.17

0.03 (−0.09; 0.16)

 

4.10

4.19

−0.06 (−0.19; 0.06)

 

P = 0.24

 

  Weight-for-age (WAZ), z-score

−2.00

−1.94

−0.04 (−0.18; 0.10)

 

−1.93

−2.01

0.07 (−0.13; 0.28)

 

−2.08

−1.87

−0.17 (−0.37; 0.04)

 

P = 0.08

 

  Underweight (WAZ < −2)

30%

33%

 

0.87 (0.72; 1.05)

28%

33%

 

0.82 (0.63; 1.07)

31%

34%

 

0.93 (0.72; 1.21)

P = 0.49

 

  Length, cm

52.7

53.1

−0.18 (−0.52; 0.16)

 

52.7

53.2

−0.32 (−0.80; 0.16)

 

52.8

53.0

−0.03 (−0.52; 0.45)

 

P = 0.38

 

  Length-for-age (LAZ), z-score

−2.47

−2.30

−0.11 (−0.26; 0.03)

 

−2.51

−2.31

−0.15 (−0.36; 0.06)

 

−2.44

−2.30

−0.08 (−0.29; 0.13)

 

P = 0.63

 

  Stunting (LAZ < −2)

44%

41%

 

1.03 (0.90; 1.18)

44%

40%

 

1.06 (0.88; 1.29)

43%

42%

 

1.00 (0.82; 1.21)

P = 0.80

 

  Head circumference, cm

37.1

37.1

0.03 (−0.17; 0.24)

 

37.2

37.1

0.06 (−0.23; 0.34)

 

37.0

37.0

0.00 (−0.29; 0.29)

 

P = 0.79

 

  Head circumference-for-age, z-score

−1.21

−1.24

0.02 (−0.14; 0.17)

 

−1.15

−1.24

0.07 (−0.15; 0.29)

 

−1.28

−1.24

−0.03 (−0.26; 0.19)

 

P = 0.51

  1. *Analyses are adjusted for randomisation to BCG and weight/length/head circumference at inclusion.
  2. **Analyses are adjusted for weight/length/head circumference at inclusion.