Sensitivity refers to the proportion of patients who suffer physical and diagnostic results says a patient who is a real disease, all of which is equal to a x 100/(a + c).
Sensitivity refers to the proportion of patients with real diseases. And the diagnosis is that the patient is actually all the same ax 100 / (a + c).
Sensitivity refers to the proportion of patients with true. And the effects of disease diagnosis said on patients with true, all of which were a x 100 / (a+c).