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Table 1 Comparison of selected demographic and clinical variables between ELBW newborns and the control group a

From: The prevalence and risk factors of allergic and respiratory symptoms in a regional cohort of extremely low birth weight children (<1000 g)

 

ELBW group (n=81)

Control group (n=40)

p value

Birth weight (g), mean (SD)

845 (130)

3554 (512)

<0.001b

Gestational age (weeks), mean (SD)

27.2 (2.1)

39.9 (1.4)

<0.001b

Female

52 (64)

21 (53)

0.15c

Vaginal delivery

17 (21)

34 (85)

<0.001c

Multiple pregnancy

10 (12)

0 (0)

<0.001c

Small for gestational age

24 (30)

2 (5)

0.003c

5th min. Apgar score, Me; (25th -75th percentile)

6 (5–7)

10 (9–10)

<0.001d

Siblings

47 (58%)

27 (67.5%)

0.33c

School attendance

71 (88%)

40 (100%)

0.03c

Paternal history of atopy

14 (17%)

3 (7.5%)

0.17c

Pets at home

32 (39.5%)

13 (32.5%)

0.7c

Passive smoking

   

None

64

32

 

History

9

1

0.16c

Current

8

7

 

Place of residence

   

City area

31

18

0.56c

Rural area

50

22

 
  1. aexpressed as a number (percentage) of patients unless otherwise indicated.
  2. p value for ANOVAb, chi square testc, and Kruskal-Wallis testd.
  3. ELBW – extremely low birth weight.