Dr Amnon Sonnenberg and colleagues from Oregon, USA analyzed physician visits associated with inflammatory bowel disease (IBD) in the United States, in order to shed light on the underlying disease time trends.
The research team used the National Diseases and Therapeutic Index of IMS America from 1960 until 2006 as the data source.
|Physician visits for Crohn's disease increased 5-fold between 1960 to 1964|
|Inflammatory Bowel Diseases|
Survey data had been obtained from a representative sample of physicians from the United States 4 times per year during a 48-hour period and extrapolated to a national level.
All physician visits for Crohn's disease and ulcerative colitis were expressed as rates per 100,000 people living in the United States.
The researchers found physician visits for Crohn's disease increased almost 5-fold between 1960 to 1964 and 1990 to 1994, and have leveled off since then.
Except for a slight decrease between 1960 to 1964 and 1980 to 1984, physician visits for ulcerative colitis have remained largely unchanged, especially during the most recent 15 years.
The researchers observed similar trends for both men and women.
Dr Sonnenbergs' team concluded, "USA time trends of physician visits are similar to other previously published time trends of inflammatory bowel disease."
"It appears that the overall incidence of inflammatory bowel disease has remained stable in the past 15 years."