Table 2.

 Clinical data on Crohn’s disease fistulae. In Crohn’s disease, every fistula is counted as a single event

No	Year of birth	Sex	Year of surgery	Location of fistula	Year of diagnosis of CD
1	1959	M	1994	Sigma	1982
			1994	Sigma
			1994	Sigma
			1997	Colon
			1998	Colon
2	1973	F	1997	Perianal	1997
3	1964	F	1994	Rectum	1993
4	1970	F	2003	Ileum	1996
			2003	Ileum
5	1967	M	2000	Ileum	1998
6	1948	M	1999	Colon	1982
7	1963	F	1998	Ileum	1998
8	1972	M	1994	Ileum	1989
9	1967	M	1997	Ileum	1987
10	1954	M	2003	Perianal	Not known
11	1975	M	1997	Ileum	1997
12	1951	M	1999	Ileum	1988
13	1939	M	1994	Ileum	1994
14	1940	F	2003	Ileum	Not known
15	1953	F	2000	Ileum	1985
16	1974	M	1995	Ileum	1995
			1998	Ileum
			1998	Colon
17	1970	F	2002	Colon	1990
18	1964	M	2002	Sigma	2002
19	1972	F	1993	Ileum	1982
20	1956	F	1993	Ileum	1993
			1993	Perianal
21	1925	M	2000	Ileum	2000
22	1953	F	1995	Rectum	1980
23	1954	M	2001	Ileum	1992
24	1953	M	1997	Ileum	1978
25	1950	F	1997	Colon	1973
26	1969	M	2000	Sigma	1999
27	1947	F	2000	Perianal	1973
28	1984	M	2002	Colon	1998
29	1985	M	2002	Colon	2001
30	1962	F	1999	Perianal	1993
31	1972	F	2000	Ileum	1988
32	1957	F	1994	Ileum	1986
			1996	Ileum
33	1971	M	1993	Ileum	1988
34	1954	F	1998	Colon	1997
			2003	Ileum
35	1969	M	2002	Ileum	1995
36	1934	F	2002	Ileum	2002
37	1952	F	1998	Colon	1986
38	1951	F	1994	Ileum	1993
39	1937	F	1997	Colon	1994
40	1961	F	1998	Ileum	1998
41	1943	F	2001	Ileum	2001
42	1975	F	2002	Colon	1994
43	1968	M	1994	Ileum	1991
			1994	Colon
			2003	Colon
44	1963	M	1999	Ileum	1991
45	1934	M	1995	Ileum	1994
			2002	Ileum
46	1968	M	2001	Ileum	1995
			2001	Colon
47	1969	M	2000	Ileum	2000
48	1988	M	2001	Ileum	2001
49	1963	M	1994	Ileum	1994
50	1959	M	1999	Perianal	1991
51	1971	M	1996	Ileum	1989
52	1973	F	1999	Ileum	1999
53	1975	F	2002	Ileum	2001
54	1961	M	2001	Ileum	1997
55	1949	F	1993	Perianal	1993
56	1976	F	2002	Perianal	1996
57	1956	M	1999	Ileum	1999
58	1978	M	2003	Ileum	2003
59	1964	F	2001	Ileum	1987
60	1938	M	2001	Ileum	2001
61	1969	F	1993	Ileum	1993
62	1957	F	1992	Colon	1992
63	1982	M	1997	Colon	1996
			1999	Ileum
64	1967	M	1998	Ileum	1997
65	1963	F	2000	Ileum	1996
				Colon
66	1967	F	2000	Ileum	1997
				Colon
67	1946	F	2002	Ileum	1985