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Table 4 Characteristics of the infants at birth and at the beginning and the end of the study

From: The effects of varying protein and energy intakes on the growth and body composition of very low birth weight infants

  

At birth

p *

At the beginning

p *

At the end

p **

Age (corrected

gestational age,

weeks)

BM

29.0 ± 1.7

----

32.2 ± 2.3

-----

35.7 ± 1.94

----

 

A

29.6 ± 1.6

0.683

32.8 ± 0.8

0.761

36.2 ± 0.60

0.406

 

B

30.2 ± 1.4

 

32.6 ± 1.22

 

36.0 ± 1.02

 
 

C

29.8 ± 1.7

 

32.9 ± 1.70

 

36.4 ± 1.53

 

Weight (g)

BM

1138 ± 173

----

1302 ± 173

----

1903 ± 223

----

 

A

1196 ± 243

0.589

1452 ± 216

0.259

1967 ± 189

0.000

 

B

1220 ± 221

 

1303 ± 213

 

1998 ± 146

A-B: 0.002

 

C

1313 ± 336

 

1404 ± 189

 

2154 ± 202

A-C: 0.002

       

B-C: 0.622

Weight (Z-score)

BM

-0.380 ± 0.918

----

-1.279 ± 0.984

----

-1.567 ± 0.738

----

 

A

-0.368 ± 0.678

0.445

-1.170 ± 0.407

0.706

-1.501 ± 0.525

0.001

 

B

-0.646 ± 0.476

 

-1.408 ± 0.639

 

-1.513 ± 0.605

A-B: 0.002

 

C

-0.309 ± 0.819

 

-1.438 ± 0.970

 

-1.347 ± 1.091

A-C: 0.001

       

B-C: 0.213

Length (cm)

BM

37.3 ± 2.2

----

39.7 ± 2.6

----

44.2 ± 1.52

-----

 

A

38.7 ± 2.7

0.750

41.5 ± 1.3

0.192

44.8 ± 0.91

0.715

 

B

37.9 ± 3.1

 

40.4 ± 1.7

 

44.5 ± 1.24

 
 

C

38.8 ± 3.5

 

41.7 ± 2.1

 

45.6 ± 1.77

 

Length (Z-score)

BM

-0.329 ± 0.903

----

-0.889 ± 0.972

----

-0.895 ± 0.845

----

 

A

0.017 ± 1.260

0.386

-0.589 ± 0.272

0.784

-0.738 ± 0.354

0.700

 

B

-0.619 ± 0.811

 

-0.807 ± 0.564

 

-0.537 ± 0.580

 
 

C

-0.215 ± 0.946

 

-0.642 ± 1.047

 

-0.441 ± 1.099

 

Head circumference

(cm)

BM

26.3 ± 1.3

----

28.0 ± 1.5

----

31.5 ± 1.28

-----

 

A

27.7 ± 1.7

0.615

29.2 ± 1.1

0.418

32.1 ± 0.55

0.077

 

B

26.8 ± 1.8

 

28.5 ± 1.3

 

32.3 ± 1.18

A-B: 0.033

 

C

27.8 ± 3.2

 

28.7 ± 1.3

 

32.3 ± 0.75

A-C: 0.097

       

B-C: 0.744

Head circumference

(Z-score)

BM

-0.297 ± 0.820

----

-0.907 ± 0.831

----

-0.654 ± 0.553

---

 

A

0.311 ± 1.375

0.164

-0.689 ± 0.429

0.409

-0.331 ± 0.517

0.203

 

B

-0.511 ± 0.583

 

-0.858 ± 0.556

 

-0.472 ± 0.639

 
 

C

-0.433 ± 0.857

 

-1.066 ± 0.761

 

-0.671 ± 0.777

 

Fat mass (g)

BM

----

----

111.1 ± 61.7

----

202.4 ± 49.6

----

 

A

----

----

140.3 ± 72.5

0.131

193.4 ± 49.6

0.182

 

B

----

 

135.7 ± 50.3

 

208.1 ± 61.0

 
 

C

----

 

129.9 ± 56.5

 

219.3 ± 52.0

 

Fat-free mass (g)

BM

----

----

1190 ± 204

----

1699 ± 206

----

 

A

----

----

1311 ± 158

0.925

1773 ± 152

0.007

 

B

----

 

1168 ± 180

 

1790 ± 127

A-B: 0.009

 

C

----

 

1274 ± 151

 

1915 ± 199

A-C: 0.044

       

B-C: 0.277

Body mass index

(kg/m 2 )

BM

8.16 ± 0.53

----

8.26 ± 0.69

----

16.0 ± 0.74

----

 

A

7.61 ± 1.00

0.195

8.41 ± 1.06

0.424

16.8 ± 1.18

0.472

 

B

8.37 ± 0.78

 

7.93 ± 0.80

 

15.6 ± 0.80

 
 

C

8.49 ± 1.25

 

8.04 ± 0.78

 

15.2 ± 1.57

 
  1. Number of patients in each group: 8 in A, 12 in B and 12 in C.
  2. Data are presented as the means ± SD
  3. * ONEWAY, with the factor group
  4. ** UNIANOVA, with the factor group and adjusted for covariates (initial corresponding value and duration of the intervention). If the p-value of the group < 0.1, pair comparisons have been performed.
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Nutrition Journal

ISSN: 1475-2891

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