Table 1.

Clinical and demographic characteristics of the patients included in the study

Male/female, n (%)	45/34 (57/43)
Age at diagnosis, y	26±11
Disease duration, y	5.7±5.5
Smoking status, n (%)
Current	14 (17.7)
Never smoked	53 (67)
Former smoker	11 (13.9)
Previous surgery, n (%)	13 (16.4)
Perianal disease, n (%)	17 (21.5)
Current treatment, n (%)	18 (22.7)
None	23 (29.1)
5-ASA	5 (6.3)
Thiopurines	20 (25)
Anti-TNF	24 (31.6)
Combined anti-TNF + thiopurines	6 (7.5)

5-ASA, 5-aminosalicylic acid; TNF, tumour necrosis factor.