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What is the controversy concerning prostate cancer?
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Screening Controversy: One major controversy surrounding prostate cancer is the debate over screening methods. The most common screening test for prostate cancer is the prostate-specific antigen (PSA) blood test. However, there is ongoing debate about the Show more…
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What is most likely responsible for the reduction in death rates over the past several years in cancers of the breast and prostate? How is this related to the development of cancer?
Prostate cancer There has been debate among doctors over whether surgery can prolong life among men suffering from prostate cancer, a type of cancer that typically develops and spreads very slowly. Recently, The New England Journal of Medicine published results of some Scandinavian research. Men diagnosed with prostate cancer were randomly assigned to either undergo surgery or not. Among the 347 men who had surgery, 16 eventually died of prostate cancer, compared with 31 of the 348 men who did not have surgery. a) Was this an experiment or an observational study? Explain. b) Create a 95% confidence interval for the difference in rates of death for the two groups of men. c) Based on your confidence interval, is there evidence that surgery may be effective in preventing death from prostate cancer? Explain.
From the Data at Hand to the World at Large
Comparing Two Proportions
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