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Table 1 Characteristics of intussusception incident cases included in the overall study cohort (2002–2012)

From: Intussusception hospitalizations incidence in the pediatric population in Italy: a nationwide cross-sectional study

 

No.

%

Incidence (per 100,000)

IRR (IC 95 %)

Total

20,524

 

21

 

 Male

11,321

55.2

23

1.16 (1.13–1.20)

 Female

9203

44.8

19

Ref

Age

 1–5 weeks

89

0.4

15

Ref

 6–14 weeks

196

1.0

19

1.22 (0.95–1.57)

 15–24 weeks

541

2.6

47

3.04 (2.43–3.80)

 25–32 weeks

561

2.7

60

3.94 (3.15–4.93)

 33–52 weeks

957

4.7

41

2.69 (2.16–3.34)

 1–3 years

2794

13.6

15

1.00 (0.81–1.23)

 4–6 years

2699

13.2

15

0.97 (0.79–1.20)

 7–9 years

4349

21.2

24

1.56 (1.27–1.93)

 10–12 years

4875

23.8

26

1.72 (1.40–2.21)

 13–15 years

3463

16.9

18

1.20 (0.97–1.48)

Geographical area

 North Italy

4968

24.2

12

Ref

 Central Italy

3408

16.6

19

1.61 (1.54–1.68)

 South Italy, Sicily and Sardinia

12,148

59.2

32

2.65 (2.56–2.74)

Risk factors (previous 6-month hospitalizations)

 Yes

291

1.4

  

 No

20,233

98.6

  

Severity

 Intussusception

18,000

87.7

  

 Intussusception requiring surgery

2036

9.9

  

 Intussusception requiring enema

488

2.4

  

Recurrence (1 year following the first episode)

 Yes

759

3.7

  

 No

19,765

96.3