Figure 1From: A retrospective study on the use of post-operative colonoscopy following potentially curative surgery for colorectal cancer in a Canadian province Time to first post-operative colonoscopy stratified by time period of diagnosis. Kaplan-Meier survival curves of time to first post-operative colonoscopy for patients diagnosed from 1983 – 1989 and 1990 – 1995. A divergence in the curves at 12 months is consistent with increased use of colonoscopy for post-operative surveillance.Back to article page