Table 1

New cases of Crohn’s disease in Stockholm County 1955–89 grouped by five year intervals of diagnosis in relation to sex, age at diagnosis, and localisation of disease at diagnosis

	1955–59	1960–64	1965–69	1970–74	1975–79	1980–84	1985–89	Total
Total	83	145	270	364	331	348	395	1936
Sex
Male	32	75	131	172	151	146	203	910
Female	51	70	139	192	180	202	192	1026
Age at diagnosis
0–14	3	17	20	15	23	24	35	137
15–29	29	69	149	190	149	148	140	874
30–44	20	32	49	89	87	90	111	478
45–59	20	22	35	43	49	47	61	277
60+	11	5	17	27	23	39	48	170
Localisation of disease at diagnosis
Orojejunal	0	2	4	4	0	8	6	24
Small bowel	7	8	11	19	18	20	29	112
Ileocaecal	52	80	126	177	170	133	169	907
Ileocolonic, continuous	11	28	64	56	47	64	52	322
Colon	12	22	57	95	86	111	128	511
Ileocolonic, discontinuous	1	5	8	13	10	10	10	57
Unknown	0	0	0	0	0	2	1	3