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.
These disorders result from an imbalance between gastric acid, which irritates the stomach lining, and the mucus barrier, which protects the stomach lining. In the past, gastritis and ulcers were thought to be due to emotional stress.However, in recent years, researchers have found that, while stress may play a minor role, infection by bacteria called Helicobacter pylori, or H. pylori, are the cause of most cases worldwide.hese disorders result from an imbalance between gastric acid, which irritates the stomach lining, and the mucus barrier, which protects the stomach lining. In the past, gastritis and ulcers were thought to be due to emotional stress.