Question

Suppose that your company has just developed a new screening test for a disease and you are in charge of testing its validity and feasibility. You decide to evaluate the test on 1000 individuals and compare the results of the new test to the gold standard. You know the prevalence of disease in your population is 30%. The screening test gave a positive result for 292 individuals. 285 of these individuals actually had the disease on the basis of the gold standard determination. Cell a: Cell b: Cell c: Cell d: 1. Calculate the sensitivity of the new screening test, including your numerator and denominator. Interpret the results of sensitivity calculation in one sentence. 2. Calculate the specificity of the new screening test, including your numerator and denominator. Interpret the results of the specificity calculation in one sentence. 3. Calculate the predictive value of a positive test. Interpret the results of the predictive value positive calculation in one sentence.

          Suppose that your company has just developed a new screening
test for a disease and you are in charge of testing its validity
and feasibility. You decide to evaluate the test on 1000
individuals and compare the results of the new test to the gold
standard. You know the prevalence of disease in your population is
30%. The screening test gave a positive result for 292 individuals.
285 of these individuals actually had the disease on the basis of
the gold standard determination.
Cell a:   Cell
b:    Cell c:    Cell
d:
1. Calculate the sensitivity of the
new screening test, including your numerator and denominator.
Interpret the results of sensitivity
calculation in one sentence.
2. Calculate the specificity of the
new screening test, including your numerator and denominator.
      Interpret the results of the
specificity calculation in one sentence.
     3.  Calculate
the predictive value of a positive test.
            Interpret the results
of the predictive value positive calculation in one sentence.

Added by Russell P.

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