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Table 2 Bivariate analysis of the risk factors for intussusception

From: Incidence and risk factors for intussusception among children in northern Israel from 1992 to 2009: a retrospective study

 

Cases

Controls

OR (95% CI)

Pv

Age (months), n (%)

    

< 3

10 (5.3)

33 (11.2)

Reference

<0.001

3-5

48 (25.3)

21 (7.1)

7.54 (3.14-18.07)

 

6-11

76 (40.0)

88 (29.8)

2.85 (1.31-6.16)

0.008

12-23

44 (24.4)

136 (46.1)

1.06 (0.48-2.34)

0.87

24-59

12 (6.3)

17 (5.8)

2.32 (0.83-6.48)

0.10

Paternal age (yrs), mean (SD)a

34.7 (5.8)

33.3 (5.6)

1.04 (0.99-1.09)

0.078

Maternal age (yrs), mean (SD)a

31.0 (5.1)

29.6 (5.1)

1.05 (1.00-1.11)

0.045

SES of residence town, n (%)a

    

Low

66 (42.9)

73 (29.4)

2.29 (1.32-3.97)

0.003

Intermediate

60 (39.0)

104 (41.9)

1.46 (0.85-2.51)

0.16

High

28 (18.2)

71 (28.6)

Reference

 

Birth weight, n (%)

    

Birth weight < 2500 gra

6 (4.2)

14 (6.0)

Reference

0.44

Birth weight ≥ 2500 gr

138 (95.8)

221 (94.0)

1.45 (0.54-3.88)

 

Birth week, n (%)

    

Less than 37 weeks

6 (4.3)

10 (4.6)

Reference

0.86

≥ 37 weeks

135 (95.7)

206 (95.4)

1.09 (0.38-3.07)

 

Gastroenteritis before admission, n (%)

    

Yes

12 (6.3)

1 (0.3)

19.82 (2.55-153.72)

<0.001

No

178 (93.7)

294 (99.7)

Reference

 

Breastfeeding < 1 yr, n (%)

    

Breastfed aged < 1 yr

50 (37.3)

40 (28.2)

Reference

0.10

Not breasted children aged <1 yr

84 (62.7)

102 (71.8)

0.65 (0.39-1.09)

 

Breastfeeding 1–4 yrs, n (%)

    

Breastfed children age 1-4 yrs

9 (16.1)

8 (5.2)

Reference

 

Not breasted children age 1-4 yrs

47 (83.9)

145 (94.8)

0.28 (0.10-0.78)

0.011

  1. aData on maternal and paternal age were available for 93 (47%) cases and 143 (48%) controls. Information on birth week was available for 141 (74%) cases and 216 (73%) controls, and on birth weight it was available for 144 (76%) cases and 235 (80%) controls. Information on SES of place of residence was available for 154 (81%) cases and 248 (84%) controls.