A test for Hepatitis C is performed for 200 patients with biopsy proven disease

Question

A test for Hepatitis C is performed for 200 patients with biopsy proven disease and 200 patients known to be free of the disease. the test shows positive results in 180 of the patients with the disease and negative results on 150 of the patients without the disease. among those tested, the test therefore.

A .has ppv of 90% d .has specificity of 82.5%

b. has a NPV OF 75% E. The information given is insufficient

c. has a sensitivity of 90%

2. which of the following organs is dually innervated?

a. adrenal medulla c. urinary bladder

b. arrector pilli muscles in the skin d. most blood vessels

3. which of the following is associated with the " flight or fight reaction?

a. glycogen synthesis d. hypoglossal

b. increase gastric motility e. pupillary contriction

f. reduced urinary output

c. reduced heart rate

Explanation / Answer

1. Tp- 180

Fp 50

Fn 20

Tn 150

Sensitivity = Tp/Tp+ Fn

180/180+ 20 = 180/200 = 90%

2 urinary bladder is dually innervated

3. Reduced urinary output is shown fight or flight response

3.

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