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Table 2 Characteristics of 216 preterm infants at time of rectal bleeding in cases and before the corresponding postnatal age in controls

From: Risk factors of mild rectal bleeding in very low birth weight infants: a case control study

 

Controls n = 144

Cases n = 72

p*

Characteristics at time of rectal bleeding

   

Postconceptional age (weeks)

34 [30–42]

34 [28–45]

0.1

Body weight (g)

1829 [1138–5030]

1690 [940–4630]

0.230

Body weight < −2 SD, n (%)

51 (35.4)

34 (47.9)

0.08

X-ray intestinal distension, n (%)

12 [8;3]

29 [40;3]

0.001

Enteral feeding at time of rectal bleeding

   

Human milk, n (%)

61 (42.4)

48 (66.7)

0.439

Preterm formula, n (%)

52 (36.1)

15 (20.8)

0.136

Human milk and preterm formula n, (%)

31 (21.5)

9 (12.5)

0.425

Starch-based thickener, n (%)

13 (9)

4 (5.6)

0.462

Carob-based thickener, n (%)

8 (5.6)

1 (1.4)

0.558

  1. Number of subjects (%) or median [min-max].
  2. *Chi-2 test (or Fisher’s exact test when required) and Wilcoxon test were performed to compare qualitative and quantitative value, respectively.