ARJ
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A study is conducted to assess the effectiveness of a new blood test for early detection of prostate cancer. Ten thousand healthy men over the age of 50 years are randomly assigned to receive either annual rectal examination or annual screening with the new blood test. After 5 years, results show that of the 50 men in the blood test group that were diagnosed with prostate cancer, 40 were living 2 years after the diagnosis was made. In comparison, only 15 out of 45 men in the rectal examination group survived 2 years after being diagnosed with prostate cancer. Researchers conclude that the blood test increases survival compared with rectal examination. Which of the following potential flaws is most likely to invalidate this conclusion?
A ) Age of the patients
B ) Diagnostic bias
C ) Lead time bias
D ) Recall bias
E ) Type II error
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| phuluong2k
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C
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| frontal
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Blood test increases survival? 
What is type II error?
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| lucky
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C
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| achilles
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its C...
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| ARJ
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Good you are correct
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| frank100
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c
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