title: Modeling and Control of Colorectal Cancer.
abstract: Colorectal Cancer (CRC) is becoming a major threat to people's life in China. Screening methods adopted by many other countries as effective counter-cancer methods have not been explicitly explored for people there. Thus, we present a Markov model with detailed precancerous adenoma states and then evaluate various screening strategies in this paper. Different from current researches, our model considers the population's heterogeneous risk of developing adenomas and observation-based screening strategies. Furthermore, we also give a new cost-effectiveness metric. After calibrating, the model is simulated using the Monte Carlo method. Numerical results show that there are threshold values of compliance rates below which strategy with every ten-year colonoscopy becomes the most cost-effective method; otherwise, an observation-based screening strategy is the most cost-effective. We also find that strategy with single colonoscopy for adenoma-free individuals and every three-year colonoscopy for those with adenoma is recommended when the observation-based strategy is not considered. Our findings give an explicit and complete instruction in CRC screening protocol in average-risk Chinese.
authors.affiliation: Department of Computer Science and Technology, North University of China, Taiyuan, Shanxi, China.
authors.forename: Li-Peng
authors.initials: LP
authors.lastname: Song
authors.affiliation: Department of Computer Science and Technology, North University of China, Taiyuan, Shanxi, China.
authors.forename: Hao-Yu
authors.initials: HY
authors.lastname: Wang
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D002681:China; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000517:prevention & control*; D003362:Cost-Benefit Analysis; D055088:Early Detection of Cancer / Q000191:economics / Q000379:methods; D006801:Humans; D008390:Markov Chains; D008875:Middle Aged; D015233:Models, Statistical; D011230:Precancerous Conditions / Q000175:diagnosis; D019057:Quality-Adjusted Life Years