This has been asked in Question Paper
IBPS Clerk Mains 2016Attempt
More Questions From Paper
Chapters. Coherent Paragraph
(a) Some of the worst cancers aren’t detected by screening.
(b) The only way to be sure is to look at the results of randomized trials comparing cancer deaths in screened and unscreened people. (c) So how can we be confident that getting a screening test regularly is a good idea?
(d) Even when screening “works” in such trials, the size of the benefit observed is surprisingly low: Generally, regular screening reduces fatalities from various cancers between 15 per cent and 25 per cent.
(e) They appear suddenly, between regular screenings, and are difficult to treat because they are so aggressive.