Recently, South African researchers conducted a study of the relationship between optimism and colon cancer survival....
Recently, South African researchers conducted a study of the relationship between optimism and colon cancer survival. Their hypothesis was that colon cancer patients who had a positive outlook on life would have a lower five-year cumulative incidence of mortality. The study included 100 recently diagnosed colon cancer patients who underwent psychological testing and were found to have an optimistic outlook on life and 100 recently diagnosed colon cancer patients who underwent the same psychological tests and were found to have a pessimistic outlook on life. By the end of five years of follow-up, 50 of the 100 patients with an optimistic outlook and 75 of the 100 patients with the pessimistic outlook had died from colon cancer. Assuming a standard 2 x 2 table and using the information given in the table below, calculate the direct measure of risk associated with this type of study design.
|
Disease (In this case-death within 5 years) |
Total |
||
|---|---|---|---|
|
Exposure |
Yes |
No |
|
|
Optimistic |
50 |
50 |
100 |
|
Pessimistic |
75 |
25 |
100 |
|
Total |
125 |
75 |
200 |
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Recently, South African researchers conducted a study of the
relationship between optimism and colon cancer survival....
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