On the left side of the equation is one or more response variables, Y. On the right hand side is one or more predictor variables, X, and their coefficients, B. X, the variables on the right hand side can have many forms and are called by many names.
Subscribe to our Digestive Health e-newsletter to stay up to date on digestive health topics. The exact cause of ulcerative colitis remains unknown. Previously, diet and stress were suspected, but now doctors know that these factors may aggravate but don't cause ulcerative colitis.One possible cause is an immune system malfunction.reviously, diet and stress were suspected, but now doctors know that these factors may aggravate but don't cause ulcerative colitis.
Colitis can be caused by infections, loss of blood supply, or chronic diseases. Despite the cause, people suffering from colitis may have typical symptoms that include. 1  abdominal pain, 2  cramping, 3  bloating, and.  diarrhea (bloody diarrhea with some types of colitis).