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Old 06-06-2011
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Stats Biostatistics #14 - Screening test

In a diabetes detection program, the screening level for a positive blood sugar level in test 1 is set at 160 mg/dl and in test 2 at 130 mg/dl. The sensitivity is:

a. greater in test 1
b. greater in test 2
c. equal in tests 1 and 2
d. dependent on the size of the population being evaluated
e. dependent on the actual prevalence of diabetes in the population
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Old 06-06-2011
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I would say B)
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Old 06-06-2011
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Quote:
Originally Posted by bebix View Post
In a diabetes detection program, the screening level for a positive blood sugar level in test 1 is set at 160 mg/dl and in test 2 at 130 mg/dl. The sensitivity is:

a. greater in test 1
b. greater in test 2
c. equal in tests 1 and 2
d. dependent on the size of the population being evaluated
e. dependent on the actual prevalence of diabetes in the population
i will go with B.
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Old 06-06-2011
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I think is b)
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Old 06-06-2011
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Correct Answer Answer is B

Quote:
Originally Posted by bebix View Post
In a diabetes detection program, the screening level for a positive blood sugar level in test 1 is set at 160 mg/dl and in test 2 at 130 mg/dl. The sensitivity is:

a. greater in test 1
b. greater in test 2
c. equal in tests 1 and 2
d. dependent on the size of the population being evaluated
e. dependent on the actual prevalence of diabetes in the population
Actually that is pretty similar to the old problem that was happening to the old cutoff value with the glucose test...

If you set a HIGHER value you are making the test MORE SPECIFIC because LESS people are going to fall into that value, so in "real proportion" in the past the cutoff value for glucose was people over 160 mg/dl today we know is 126 mg/dl MAKING the test MORE Sensitive and LESS specific..

That was just a little review :P the ansewr is Greater in the test 2, answer is B.

Answer A: Is more Specific
Answer C: Of course is not equal
Answer D: Didn't think on any reason to choose this one :P but is not this
Answer E: Sensitivity and Specificity are NOT affected by prevalence.
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Old 06-06-2011
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Quote:
Originally Posted by bebix View Post
In a diabetes detection program, the screening level for a positive blood sugar level in test 1 is set at 160 mg/dl and in test 2 at 130 mg/dl. The sensitivity is:

a. greater in test 1
b. greater in test 2
c. equal in tests 1 and 2
d. dependent on the size of the population being evaluated
e. dependent on the actual prevalence of diabetes in the
population
Yup its B for sure
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Old 06-06-2011
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Correct Answer correct answer

Yup...congrats!

the answer is B)
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