Variable

Cases

N = 103 (%)

Controls

N = 103 (%)

Total

N = 206 (%)

OR (95% CI)

p-value

Pyelonephritis

Yes

14 (13.6)

2 (2)

14 (6.8)

4.6 (3.7 - 17.2)

<0.001

No

89 (86.4)

103 (100)

192 (93.2)

Ref.

Recurrent urinary tract infection during the pregnancy

Yes

19 (18.4)

1 (1)

20 (9.7)

23.07 (4.1 - 488.6)

<0.001

No

84 (81.6)

102 (99)

186 (90.3)

Ref.

Threatened abortion

Yes

14 (13.6)

0 (0)

14 (6.8)

-

<0.001

No

89 (86.4)

103 (100)

192 (93.2)

Ref.

Preterm labor

Yes

38 (36.9)

2 (1.9)

40 (19.4)

29.52 (7.94 - 184.95)

<0.001

No

65 (63.1)

101 (98.1)

166 (80.6)

Ref.

Premature rupture of membranes

Yes

38 (36.9)

2 (1.9)

40 (19.4)

29.52 (7.94 - 184.95)

<0.001

No

65 (63.1)

101 (98.1)

166 (80.6)

Ref.

Amnionitis

Yes

33 (29.1)

4 (2.3)

37 (16.3)

18.33 (3.1 - 44.2)

0.001

No

70 (70.9)

99 (97.7)

51 (83.7)

Ref.

Vaginal birth

Yes

82 (79.6)

79 (76.7)

161 (78.2)

1.19 (0.61 - 2.32)

0.37

No

21 (20.4)

24 (23.3)

45 (21.8)

Ref.

Cesarean section

Yes

21 (20.4)

24 (23.3)

45 (21.8)

0.84 (0.43 - 1.64)

0.37

No

82 (79.6)

79 (76.7)

161 (78.2)

Ref.