Step I Prevalence question

[MedicalDestiny]

Dear guys, please help with this question. I can't figure it out.

INCREASED prevalence of a disease increase which one of the below?

Sensitivity
Specificity
PPV
NPV


Please only reply if you know for sure.
Thank you.

 

[DrBowtie]

Ppv

 

[MedicalDestiny]

Thanks. 🙂
When we make that box listing TP, FP, etc.
What numbers would be increasing if prevalence increase (if any)?
Somehow I thought that prevalence would increase sensitivity as well as PPV. Can you explain this?
Thank you.

 

[ctizzle13498]

sens and spec are unique to a particular test...it doesnt change with prevalence

a test in china and a test in usa has the same sens and spec