The Data Below Are from Three Separate Studies That Tested

question 43

Multiple Choice

The data below are from three separate studies that tested different treatment options for prostate cancer. What can you conclude from these data?

• A)The men who were treated with surgery were the healthiest group after 10 years.
• B)Cancer progressed the least after 10 years for the men who received external radiation.
• C)After 5 years all three treatment options had similar outcomes.
• D)After 15 years it is expected that approximately 90% of men who received radiation seeds would have cancer that did not progress.

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Definitions:

Mechanism

A detailed description of the step-by-step process by which chemical reactions occur, including the breaking and forming of bonds.

Aromatic Ring

A stable ring-shaped molecule made up of alternating single and double bonds, common in many organic compounds.

O,p-director

Substituents that direct incoming substituents to the ortho and para positions in an aromatic ring during electrophilic substitution reactions.

Major Organic Product

The predominant compound produced through an organic reaction, usually of greatest interest or utility.