Crohn's disease incidence in NHS Tayside.
OBJECTIVE
The incidence of Crohn's disease (CD) in northeastern Scotland was last reported as rising in the 1980's, while in the rest of Europe it had reached steady state. This study reviewed the incidence of CD in NHS Tayside.


METHODS
Data was collected retrospectively and analysed using age and sex standardization, socioeconomic factors and urban and rural postcodes.


RESULTS
A point prevalence of 157 per 100,000 population in the Tayside region was found. The average incidence of CD was 9.56 per 100,000 per year between 2003 and 2007 and 7.16 per 100,000 per year between 1998 and 2001. There was no link to urbanization and no difference in incidence between the sexes. Incidence was not related to affluence in this population and peak age of onset occurred in the third decade of life only. 12.7% of patients had a family history of inflammatory bowel disease and 25% of patients were current smokers.


CONCLUSIONS
The incidence of CD appears to have arrived at a steady state in Tayside, while recent evidence suggests that it is on the rise in Scandinavia again. The results of the genetic studies to come from the east of Scotland are eagerly awaited to help shed light on the aetiology of this complex disorder.
Steed
H
H
Gut Group, Dundee University, Ninewells Hospital, Dundee, DD1 9SY, UK. helensteed@doctors.org.uk
Walsh
S
S
Reynolds
N
N
D003424:Crohn Disease / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D012606:Scotland / Q000453:epidemiology; D012907:Smoking / Q000453:epidemiology