In tests for pironoma, a serious disease, a false positive result indicates that people have pironoma when, in fact, they do not; a false negative result indicates that people do not have pironoma when, in fact, they do. To detect pironoma most accurately, physicians should use the laboratory test that has the lowest proportation of false positive results.

Which of the following, if true, gives the most support to the recommendation above?

a.  The accepted treatment for pironoma does not have damaging side effects.

b. The laboratory test that has the lowest proportion of false positive results causes the same minor side effects as do the other laboratory tests used to detect pironoma.

c. In treating pironoma patients, it is essential to begin treatment as early as possible, since even a week of delay can result in loss of life.

d. The proportion of inconlusive test results is equal for all laboratory tests used to detect pironoma.

e. All laboratory tests to detect pironoma have the same propotion of false negative results.

我明白题目在说什么，但是我不明白答案应该选哪个。看了解释，还是不明白。请大家给我解释一下好吗？

E

因为错误阴性的出错率是一样的，当然选最低的错误阳性出错率。

其实就是把错误诊断率false negative 和 false positve降低到最小，即然

false negative 是一定的，于是就选 false positiv 最小的那个。所以e 固定

了一个因素false negative，只需考虑另一个因素false positive----支持了结论。