Sigmoidoscopy screening probably works, but how well is still unknown.
Mandel
Jack S
JS
D016022:Case-Control Studies; D015179:Colorectal Neoplasms / Q000175:diagnosis / Q000401:mortality*; D006801:Humans; D015994:Incidence; D008403:Mass Screening / Q000379:methods* / Q000706:statistics & numerical data*; D016032:Randomized Controlled Trials as Topic; D012812:Sigmoidoscopy / Q000706:statistics & numerical data*