Table 1 The characteristics of newborns with symptoms of infections and E. coli infections

Birth weight

1091.4

[1072.4, 1110.4]

991.1

[971.9,1010.2]

NA

<0.0001

909.1

[858.6, 959.6]

NA

<0.0001

Gestational age

29.1

[28.8, 29.3]

28.0

[27.8, 28.2]

NA

<0.0001

27.0

[26.5, 27.6]

NA

<0.0001

CRIB

4.5

[4.1, 5.0]

4.4

[4.0, 4.8]

NA

-

5.5

[4.1, 6.8]

NA

-

Apgar (1 min.)

5.5

[5.3, 5.6]

5.3

[5.2, 5.4]

NA

<0.0001

4.8

[4.4, 5.2]

NA

<0.0001

Apgar (5 min.)

6.0

[5.9, 6.2]

6.0

[5.9, 6.2]

NA

-

5.7

[5.3, 6.1]

NA

<0.0001

Number and percentage of population

Female gender

438

49.2

350

44.8

1.19

0.986-1.45

-

44

45.8

0.96

0.626-1.465

-

Caesarean section

731

82.1

624

79.8

1.03

0.803-1.326

0.0002

62

64.6

2.17

1.377-3.408

<0.0001

Breast feeding

64

7.2

44

5.6

1.29

0.874-.932

-

3

3.1

5482

0.563-6.071

-

Trophic feeding

295

33.1

310

39.6

0.75

0.618-0.922

0.008

42

43.8

0.84

0.550-1.295

<0.0001

Total parenteral nutrition

319

35.8

409

52.3

0.51

0.419-0.619

<0.0001

56

58.3

0.78

0.509-1.203

<0.0001

Perinatal antibiotic prophylaxis

335

37.6

344

44.0

0.77

0.632-0.935

0.009

46

47.9

0.85

0.558-1.305

<0.0001

Death of the patient

209

23.5

64

8.2

3.44

2.553-4.643

<0.0001

14

14.6

0.52

0.280-0.972

<0.0001

Infants born from deliveries where the following were diagnosed during the mother’s pregnancy:

PROM

185

20.8

211

27.0

0.71

0.566-0.890

0.0008

33

34.4

0.71

0.449-1.106

<0.0001

Chorioamnionitis

62

7.0

60

7.7

0.90

0.623-1.303

-

13

13.5

0.53

0.279-1.000

<0.0001