아빠가 들려주는 [통계] sample size for sensitivity, specificity

아빠가 들려주는 [통계] sample size for sensitivity, specificity


 

HOW TO USE

Old test has 70% of sensitivity and 80%of specificity. New test has 80% of sensitivity and 90%of specificity.

If you want to show New test is better than old test, how many samples do you need?

In this excel sheet shows you need 142  patients and 119 normal subjects.

But in usual situation, you donot not who is patients or not. You know only prevalance. 

Then this excel sheet can calculate the next steps.

If you input 0.3 as prevalance, you can get 2 potencial numbers such as 474 and 170, but 170 is not proper.

You finally get 474 as answer and excel sheet show you "yes" as a tag for descision.

 

2014년 2월 19일... 이전에 만들어 두었던 엑셀 파일을 이제서야 올리네요.
그제 알게된 분께서 진단 관련 사업을 하신다길래 부랴부랴 찾았습니다.
우리나라에서 좋은 진단법들이 계속 나와서 세계 의학에도 기여하고,
우리나라 경제에도 도움되면 좋겠습니다.

화이팅.