A colonoscopy or flexible sigmoidoscopy was performed and the Mayo Score was determined at weeks 0 and 8. A partial Mayo Score (Mayo Score without endoscopy) was determined at all visits between weeks 0 and 8 inclusive. Clinical response was defined as a decrease from baseline in the total Mayo Score by at least 3 points and at least 30% with an accompanying decrease in rectal bleeding subscore of at least 1 point or a absolute rectal bleeding subscore of 0 or 1 point (1 2,13) .