Codes and Frequencies
CROHNEV identifies sample adults who were ever diagnosed with Crohn's disease or ulcerative colitis by a doctor or other health professional.
Sample adults who were ever diagnosed with Crohn's disease or ulcerative colitis were asked whether they had symptoms of the disease during the past 12 months (CROHNYR) and the age when they were first diagnosed (CROHNAGE).
Crohn's disease and ulcerative colitis are inflammatory bowel diseases. Ulcerative colitis is a chronic inflammation of the large intestine. Crohn's disease can affect any area of the gastrointestinal tract but most commonly affects the lower part of the small intestine. No definition of these conditions was given to interviewers or respondents.
In 2002 and 2007, sample adults were asked if a doctor or other health professional had ever diagnosed them as having "inflammatory bowel disease, irritable bowel, or constipation severe enough to require medication" (BOWELIRREV). Respondents with an affirmative answer in BOWELIRREV were asked whether they had this condition during the past 12 months (IRRBOWELYR). In 2007, sample adults who had the condition during the past 12 months were asked whether the specific condition they experienced was inflammatory bowel disease (BOWELINFYR), irritable bowel (IRRBOWELYR), or constipation severe enough to require medication (BOWELCONYR).
In 2015, sample adults were asked "Have you EVER been told by a doctor or other health professional that you had Crohn's disease or ulcerative colitis." The 2015 Field Representative's Manuals provides the information that "Inflammatory Bowel Diseases (IBDs) are conditions with chronic or recurring immune response and inflammation of the gastrointestinal tract. The two most common inflammatory bowel diseases are ulcerative colitis and Crohn's disease."
DIARRHEAYR, available for 1997 forward, identifies sample children who had "frequent or repeated diarrhea or colitis" during the past twelve months.
- 1999; 2015 2016: Sample adults age 18+.
- 1999, 2015-2016
- 1999, 2015-2016 : SAMPWEIGHT