question for 4e

question for 4e

by Christine -

The question for 4e:

 

e.   This study included consecutive boys with "acute scrotum" who were going to be explored surgically.  The 4 clinical features included in the decision rule (pain <24 hours, nausea/vomiting, abnormal cremasteric reflex, high position of the testis) were undoubtedly used to make the diagnosis of “acute scrotum.”  What bias would that cause, and how would it be expected to affect the estimates of sensitivity and specificity? [2]

 

Is this asking about the sensitivity and specificity of 1) acute scrotum or for 2) testicular torsion?

 

Thank you!

Chris

Re: question for 4e

by Thomas Newman -

Thanks for asking.

The question is asking how the use of the 4 findings that ended up in their prediction rule to help decide who had "acute scrotum" (and therefore would be included in the study) would affect the sensitivity and specificity of the prediction rule for the diagnosis of testicular torsion.