Table 1 Distribution of the patients enrolled, grouped by age at diagnosis (group A, 5 to 10 years, versus group B, 11 to 16 years of age at diagnosis), by type of Inflammatory Bowel Disease, gender and ethnicity. Disease location, CD behaviour, Growth (for CD) and Severity (for UC) are also displayed according to the Paris Classification [28]

Patients’ number

40

40

40

40

 Distribution by gender

23 M^c 17 F^d

25 M 15 F

15 M 25 F

20 M 20 F

 Mean ± SD^e

7.65 ± 2.38

14.1 ± 1.03

7.4 ± 3.1

13.4 ± 1.39

 Median

8.34

14.3

7.9

13.5

 Range

5.1–10.6

11.4–16.6

5.6–10.8

11.2–16.3

 Distribution by type of IBD^f

15 CD^g

19 CD

16 CD

22 CD

4 IBD-U^h CD-like

5 IBD-U CD-like

1 IBD-U CD-like

1 IBD-U CD-like

12 UCⁱ

7 UC

15 UC

15 UC

9 IBD-U UC-like

9 IBD-U UC-like

8 IBD-U UC-like

2 IBD-U UC-like

 Mean ± SD

3.1 ± 2.3

1.92 ± 1.19

4.5 ± 3.71

2.21 ± 2.4

 Median

2.8

1.72

4.2

1.17

 Range

0.1–11.14

0.3–4.62

0.04–11.7

0.07–9.5

 Ethnicity

36 white British

38 white British

34 white Italians

38 white Italians

3 white non-British (Belgium, Italy, Romania)

1 white non British (Turkey)

6 white non-Italians (2 from Romania, 2 from Moldova, 1 from Kosowo, 1 Gipsy)

1 white non-Italian (Romania)

1 African (Morocco)

1 African (Egypt)

1 African (Morocco)

Disease location (Paris Classification [28])

CD

CD

CD

CD

2 L1 + L4a

1 L1/2 L1 + L4a/1 L1 + L4b

1 L1

2 L1/2 L1 + L4a

2 L2/4 L2 + L4a

1 L2 + L4a

5 L2/1 L2 + L4a

1 L2/1 L2 + L4a

9 L3 + L4a/2 L3 + L4b

3 L3/16 L3 + L4a

3 L3/7 L3 + L4a

10 L3/7 L3 + L4a

UC

UC

UC

UC

1 E1/2 E2

1 E1/2 E2

1 E1/7 E2

2 E1/4 E2

1 E3/17E4

2 E3/11 E4

1 E3/14 E4

2 E3/9 E4

CD behaviour (Paris Classification [28])

11 B1, 5 pB1

11 B1, 4 pB1

10 B1, 2 pB1

5 B1, 5pB1

1 B2

5 B2

1 B2, 1 pB2

10 B2, 1 pB2

1B3

1 B3, 1 pB3

1pB3

1 pB3

1pB2B3

1 B2B3, 1 pB2B3

1 B2B3, 1 pB2B3

1 B2B3

CD growth (Paris Classification [28])

4 S1

3 S1

3 S1

2 S1

17 S0

13 S0

20 S0

15 S0