translate English to French: The evidence to date suggests that 1 or 2 cancers per 1,000 individuals may be detected by sigmoidoscopy and these cancers may be detected at an earlier stage.
Environ 70 % des t´ moins avaient subi e e e une sigmo¨doscopie de d´ pistage comparativement a seulement 11 % ı e ` des cas (ratio de cotes (RC) 0,21; intervalle de confiance a 95 %, 0,08 a ` ` 0,52).